Linux 2.6.31.2-test relatime barrier=0 fs=ext4 disk=areca RAID6 journal=int data=journal scheduler=cfq ************************************************************************************** 1 readers (30s) ---------------------------------------------------------------------- Linux 2.6.31.2-test relatime barrier=0 fs=ext4 disk=HDD journal=int data=journal scheduler=cfq ************************************************************************************** 1 readers (30s) ---------------------------------------------------------------------- A read dir cnt 27736 min 0.001 ms max 49.782 ms avg 0.053 ms med 0.004 ms std 0.590 B lstat file cnt 25915 min 0.006 ms max 21.600 ms avg 0.033 ms med 0.024 ms std 0.331 C open file cnt 20455 min 0.014 ms max 0.231 ms avg 0.021 ms med 0.017 ms std 0.011 D rd 1st byte cnt 20455 min 0.175 ms max 169.608 ms avg 0.621 ms med 0.284 ms std 1.839 E read rate 39.868 MB/s (data) 18.381 MB/s (readdir + open + 1st byte + data) 3 readers (30s) ---------------------------------------------------------------------- A read dir cnt 3491 min 0.001 ms max 46.846 ms avg 1.029 ms med 0.004 ms std 4.559 B lstat file cnt 3244 min 0.006 ms max 35.487 ms avg 0.051 ms med 0.026 ms std 0.828 C open file cnt 2502 min 0.014 ms max 0.097 ms avg 0.020 ms med 0.017 ms std 0.009 D rd 1st byte cnt 2502 min 0.185 ms max 444.524 ms avg 6.410 ms med 0.385 ms std 17.230 E read rate 6.239 MB/s (data) 2.089 MB/s (readdir + open + 1st byte + data) 3 readers, 3 writers (30s) ---------------------------------------------------------------------- F write open cnt 25 min 0.042 ms max 0.055 ms avg 0.047 ms med 0.046 ms std 0.003 G wr 1st byte cnt 25 min 0.006 ms max 0.015 ms avg 0.007 ms med 0.007 ms std 0.002 H write close cnt 25 min 0.018 ms max 0.032 ms avg 0.024 ms med 0.024 ms std 0.003 I mkdir cnt 1 min 0.045 ms max 0.045 ms avg 0.045 ms med 0.045 ms std 0.000 J write rate 317.319 MB/s (data) 164.464 MB/s (open + 1st byte + data + close) A read dir cnt 7053 min 0.001 ms max 64.260 ms avg 0.838 ms med 0.004 ms std 4.310 B lstat file cnt 6567 min 0.006 ms max 32.875 ms avg 0.049 ms med 0.026 ms std 0.694 C open file cnt 5109 min 0.014 ms max 0.141 ms avg 0.020 ms med 0.018 ms std 0.010 D rd 1st byte cnt 5109 min 0.174 ms max 220.157 ms avg 5.411 ms med 0.361 ms std 10.403 E read rate 6.961 MB/s (data) 2.527 MB/s (readdir + open + 1st byte + data) Linux 2.6.31.2-test atime barrier=0 fs=ext4 disk=HDD journal=int data=journal scheduler=cfq ************************************************************************************** 1 readers (30s) ---------------------------------------------------------------------- A read dir cnt 27952 min 0.001 ms max 49.707 ms avg 0.057 ms med 0.004 ms std 0.626 B lstat file cnt 26118 min 0.006 ms max 21.598 ms avg 0.033 ms med 0.024 ms std 0.334 C open file cnt 20614 min 0.014 ms max 0.239 ms avg 0.021 ms med 0.018 ms std 0.010 D rd 1st byte cnt 20614 min 0.174 ms max 26.087 ms avg 0.604 ms med 0.279 ms std 1.396 E read rate 39.686 MB/s (data) 18.502 MB/s (readdir + open + 1st byte + data) 3 readers (30s) ---------------------------------------------------------------------- A read dir cnt 3559 min 0.001 ms max 50.287 ms avg 1.043 ms med 0.004 ms std 4.643 B lstat file cnt 3306 min 0.007 ms max 32.197 ms avg 0.049 ms med 0.026 ms std 0.779 C open file cnt 2549 min 0.015 ms max 0.132 ms avg 0.021 ms med 0.018 ms std 0.011 D rd 1st byte cnt 2549 min 0.173 ms max 59.799 ms avg 6.317 ms med 0.501 ms std 9.706 E read rate 6.457 MB/s (data) 2.123 MB/s (readdir + open + 1st byte + data) 3 readers, 3 writers (30s) ---------------------------------------------------------------------- F write open cnt 395 min 0.040 ms max 146212.484 ms avg 370.252 ms med 0.044 ms std 7347.426 G wr 1st byte cnt 395 min 0.006 ms max 0.107 ms avg 0.008 ms med 0.007 ms std 0.007 H write close cnt 395 min 0.015 ms max 0.148 ms avg 0.023 ms med 0.021 ms std 0.012 I mkdir cnt 32 min 0.024 ms max 48.745 ms avg 1.560 ms med 0.032 ms std 8.475 J write rate 385.714 MB/s (data) 0.105 MB/s (open + 1st byte + data + close) A read dir cnt 20258 min 0.001 ms max 68.241 ms avg 0.709 ms med 0.004 ms std 3.874 B lstat file cnt 18919 min 0.006 ms max 35.504 ms avg 0.047 ms med 0.026 ms std 0.692 C open file cnt 14902 min 0.014 ms max 0.263 ms avg 0.020 ms med 0.018 ms std 0.010 D rd 1st byte cnt 14902 min 0.174 ms max 3608.074 ms avg 5.976 ms med 0.364 ms std 31.437 E read rate 6.970 MB/s (data) 2.401 MB/s (readdir + open + 1st byte + data) Linux 2.6.31.2-test relatime barrier=1 fs=ext4 disk=HDD journal=int data=journal scheduler=cfq ************************************************************************************** 1 readers (30s) ---------------------------------------------------------------------- A read dir cnt 27918 min 0.001 ms max 58.103 ms avg 0.055 ms med 0.004 ms std 0.640 B lstat file cnt 26087 min 0.007 ms max 21.571 ms avg 0.033 ms med 0.024 ms std 0.321 C open file cnt 20590 min 0.014 ms max 0.183 ms avg 0.021 ms med 0.018 ms std 0.011 D rd 1st byte cnt 20590 min 0.174 ms max 21.460 ms avg 0.612 ms med 0.288 ms std 1.393 E read rate 40.096 MB/s (data) 18.516 MB/s (readdir + open + 1st byte + data) 3 readers (30s) ---------------------------------------------------------------------- A read dir cnt 3841 min 0.001 ms max 65.333 ms avg 0.989 ms med 0.004 ms std 4.741 B lstat file cnt 3567 min 0.007 ms max 34.718 ms avg 0.049 ms med 0.026 ms std 0.795 C open file cnt 2749 min 0.015 ms max 0.131 ms avg 0.020 ms med 0.018 ms std 0.009 D rd 1st byte cnt 2749 min 0.175 ms max 59.643 ms avg 5.424 ms med 0.367 ms std 9.316 E read rate 6.341 MB/s (data) 2.311 MB/s (readdir + open + 1st byte + data) 3 readers, 3 writers (30s) ---------------------------------------------------------------------- F write open cnt 36 min 0.043 ms max 0.055 ms avg 0.048 ms med 0.048 ms std 0.003 G wr 1st byte cnt 36 min 0.006 ms max 0.011 ms avg 0.007 ms med 0.007 ms std 0.001 H write close cnt 36 min 0.019 ms max 0.039 ms avg 0.024 ms med 0.024 ms std 0.004 I mkdir cnt 1 min 0.038 ms max 0.038 ms avg 0.038 ms med 0.038 ms std 0.000 J write rate 361.395 MB/s (data) 232.072 MB/s (open + 1st byte + data + close) A read dir cnt 7669 min 0.001 ms max 48.609 ms avg 0.654 ms med 0.004 ms std 3.627 B lstat file cnt 7142 min 0.007 ms max 28.781 ms avg 0.055 ms med 0.026 ms std 0.824 C open file cnt 5565 min 0.014 ms max 0.161 ms avg 0.020 ms med 0.018 ms std 0.010 D rd 1st byte cnt 5565 min 0.176 ms max 285.210 ms avg 5.610 ms med 0.359 ms std 11.199 E read rate 7.093 MB/s (data) 2.596 MB/s (readdir + open + 1st byte + data) Linux 2.6.31.2-test atime barrier=1 fs=ext4 disk=HDD journal=int data=journal scheduler=cfq ************************************************************************************** 1 readers (30s) ---------------------------------------------------------------------- A read dir cnt 27757 min 0.001 ms max 49.837 ms avg 0.055 ms med 0.004 ms std 0.618 B lstat file cnt 25935 min 0.006 ms max 18.506 ms avg 0.032 ms med 0.024 ms std 0.311 C open file cnt 20472 min 0.014 ms max 0.380 ms avg 0.021 ms med 0.018 ms std 0.010 D rd 1st byte cnt 20472 min 0.175 ms max 18.335 ms avg 0.610 ms med 0.281 ms std 1.402 E read rate 39.311 MB/s (data) 18.372 MB/s (readdir + open + 1st byte + data) 3 readers (30s) ---------------------------------------------------------------------- A read dir cnt 3965 min 0.001 ms max 66.063 ms avg 0.859 ms med 0.004 ms std 4.155 B lstat file cnt 3685 min 0.007 ms max 30.953 ms avg 0.045 ms med 0.026 ms std 0.663 C open file cnt 2845 min 0.014 ms max 0.147 ms avg 0.021 ms med 0.018 ms std 0.010 D rd 1st byte cnt 2845 min 0.178 ms max 67.175 ms avg 5.446 ms med 0.361 ms std 9.261 E read rate 6.710 MB/s (data) 2.401 MB/s (readdir + open + 1st byte + data) 3 readers, 3 writers (30s) ---------------------------------------------------------------------- F write open cnt 25 min 0.042 ms max 272.075 ms avg 10.926 ms med 0.044 ms std 53.307 G wr 1st byte cnt 25 min 0.006 ms max 0.016 ms avg 0.007 ms med 0.006 ms std 0.002 H write close cnt 25 min 0.017 ms max 0.042 ms avg 0.024 ms med 0.022 ms std 0.005 I mkdir cnt 1 min 0.041 ms max 0.041 ms avg 0.041 ms med 0.041 ms std 0.000 J write rate 314.092 MB/s (data) 5.919 MB/s (open + 1st byte + data + close) A read dir cnt 4157 min 0.001 ms max 68.778 ms avg 0.917 ms med 0.004 ms std 4.574 B lstat file cnt 3871 min 0.006 ms max 36.098 ms avg 0.064 ms med 0.026 ms std 1.059 C open file cnt 3009 min 0.014 ms max 0.141 ms avg 0.020 ms med 0.018 ms std 0.010 D rd 1st byte cnt 3009 min 0.180 ms max 239.733 ms avg 6.028 ms med 0.384 ms std 11.285 E read rate 7.012 MB/s (data) 2.330 MB/s (readdir + open + 1st byte + data) Linux 2.6.31.2-test relatime barrier=0 fs=ext4 disk=HDD journal=int data=journal scheduler=deadline ************************************************************************************** 1 readers (30s) ---------------------------------------------------------------------- A read dir cnt 27797 min 0.001 ms max 49.602 ms avg 0.058 ms med 0.004 ms std 0.641 B lstat file cnt 25974 min 0.006 ms max 21.621 ms avg 0.033 ms med 0.024 ms std 0.331 C open file cnt 20501 min 0.014 ms max 0.197 ms avg 0.021 ms med 0.018 ms std 0.010 D rd 1st byte cnt 20501 min 0.174 ms max 21.491 ms avg 0.610 ms med 0.285 ms std 1.402 E read rate 39.858 MB/s (data) 18.441 MB/s (readdir + open + 1st byte + data) 3 readers (30s) ---------------------------------------------------------------------- A read dir cnt 3634 min 0.001 ms max 65.947 ms avg 0.950 ms med 0.004 ms std 4.496 B lstat file cnt 3376 min 0.007 ms max 31.330 ms avg 0.051 ms med 0.026 ms std 0.794 C open file cnt 2607 min 0.015 ms max 0.134 ms avg 0.021 ms med 0.018 ms std 0.011 D rd 1st byte cnt 2607 min 0.179 ms max 63.240 ms avg 5.996 ms med 0.427 ms std 9.568 E read rate 6.095 MB/s (data) 2.150 MB/s (readdir + open + 1st byte + data) 3 readers, 3 writers (30s) ---------------------------------------------------------------------- F write open cnt 25 min 0.042 ms max 0.068 ms avg 0.046 ms med 0.044 ms std 0.005 G wr 1st byte cnt 25 min 0.006 ms max 0.012 ms avg 0.007 ms med 0.007 ms std 0.001 H write close cnt 25 min 0.018 ms max 0.039 ms avg 0.022 ms med 0.022 ms std 0.005 I mkdir cnt 1 min 0.038 ms max 0.038 ms avg 0.038 ms med 0.038 ms std 0.000 J write rate 384.874 MB/s (data) 268.351 MB/s (open + 1st byte + data + close) A read dir cnt 4568 min 0.001 ms max 56.338 ms avg 0.685 ms med 0.004 ms std 3.942 B lstat file cnt 4259 min 0.007 ms max 28.015 ms avg 0.056 ms med 0.026 ms std 0.836 C open file cnt 3335 min 0.015 ms max 0.196 ms avg 0.021 ms med 0.018 ms std 0.012 D rd 1st byte cnt 3335 min 0.181 ms max 203.886 ms avg 5.305 ms med 0.353 ms std 10.083 E read rate 7.786 MB/s (data) 2.655 MB/s (readdir + open + 1st byte + data) Linux 2.6.31.2-test atime barrier=0 fs=ext4 disk=HDD journal=int data=journal scheduler=deadline ************************************************************************************** 1 readers (30s) ---------------------------------------------------------------------- A read dir cnt 28054 min 0.001 ms max 49.893 ms avg 0.053 ms med 0.004 ms std 0.595 B lstat file cnt 26214 min 0.006 ms max 21.595 ms avg 0.033 ms med 0.025 ms std 0.334 C open file cnt 20690 min 0.014 ms max 0.204 ms avg 0.021 ms med 0.018 ms std 0.011 D rd 1st byte cnt 20690 min 0.175 ms max 18.398 ms avg 0.608 ms med 0.285 ms std 1.391 E read rate 40.138 MB/s (data) 18.618 MB/s (readdir + open + 1st byte + data) 3 readers (30s) ---------------------------------------------------------------------- A read dir cnt 3762 min 0.001 ms max 62.508 ms avg 1.061 ms med 0.004 ms std 4.789 B lstat file cnt 3494 min 0.007 ms max 31.077 ms avg 0.046 ms med 0.026 ms std 0.688 C open file cnt 2696 min 0.014 ms max 0.095 ms avg 0.021 ms med 0.018 ms std 0.009 D rd 1st byte cnt 2696 min 0.177 ms max 90.041 ms avg 5.660 ms med 0.372 ms std 9.530 E read rate 6.474 MB/s (data) 2.247 MB/s (readdir + open + 1st byte + data) 3 readers, 3 writers (30s) ---------------------------------------------------------------------- F write open cnt 25 min 0.043 ms max 0.116 ms avg 0.050 ms med 0.046 ms std 0.014 G wr 1st byte cnt 25 min 0.007 ms max 0.101 ms avg 0.011 ms med 0.007 ms std 0.018 H write close cnt 25 min 0.018 ms max 0.091 ms avg 0.030 ms med 0.023 ms std 0.022 I mkdir cnt 1 min 0.057 ms max 0.057 ms avg 0.057 ms med 0.057 ms std 0.000 J write rate 346.020 MB/s (data) 234.207 MB/s (open + 1st byte + data + close) A read dir cnt 4133 min 0.001 ms max 104.934 ms avg 0.888 ms med 0.004 ms std 4.640 B lstat file cnt 3847 min 0.006 ms max 44.255 ms avg 0.065 ms med 0.026 ms std 1.062 C open file cnt 2987 min 0.015 ms max 0.183 ms avg 0.020 ms med 0.018 ms std 0.010 D rd 1st byte cnt 2987 min 0.176 ms max 214.362 ms avg 5.717 ms med 0.370 ms std 10.750 E read rate 6.549 MB/s (data) 2.335 MB/s (readdir + open + 1st byte + data) Linux 2.6.31.2-test relatime barrier=1 fs=ext4 disk=HDD journal=int data=journal scheduler=deadline ************************************************************************************** 1 readers (30s) ---------------------------------------------------------------------- A read dir cnt 27815 min 0.001 ms max 49.828 ms avg 0.058 ms med 0.004 ms std 0.638 B lstat file cnt 25991 min 0.006 ms max 21.616 ms avg 0.033 ms med 0.025 ms std 0.331 C open file cnt 20516 min 0.014 ms max 0.304 ms avg 0.021 ms med 0.018 ms std 0.011 D rd 1st byte cnt 20516 min 0.175 ms max 23.973 ms avg 0.611 ms med 0.286 ms std 1.411 E read rate 39.942 MB/s (data) 18.442 MB/s (readdir + open + 1st byte + data) 3 readers (30s) ---------------------------------------------------------------------- A read dir cnt 3614 min 0.001 ms max 53.237 ms avg 0.928 ms med 0.004 ms std 4.417 B lstat file cnt 3356 min 0.007 ms max 27.272 ms avg 0.050 ms med 0.026 ms std 0.792 C open file cnt 2584 min 0.015 ms max 0.097 ms avg 0.021 ms med 0.018 ms std 0.010 D rd 1st byte cnt 2584 min 0.177 ms max 68.607 ms avg 6.104 ms med 0.410 ms std 9.802 E read rate 6.096 MB/s (data) 2.144 MB/s (readdir + open + 1st byte + data) 3 readers, 3 writers (30s) ---------------------------------------------------------------------- F write open cnt 411 min 0.040 ms max 126156.568 ms avg 307.222 ms med 0.045 ms std 6215.257 G wr 1st byte cnt 411 min 0.006 ms max 0.169 ms avg 0.008 ms med 0.007 ms std 0.010 H write close cnt 411 min 0.017 ms max 0.168 ms avg 0.024 ms med 0.022 ms std 0.012 I mkdir cnt 24 min 0.025 ms max 23417.966 ms avg 975.780 ms med 0.033 ms std 4679.519 J write rate 1.704 MB/s (data) 0.089 MB/s (open + 1st byte + data + close) A read dir cnt 19802 min 0.001 ms max 67.149 ms avg 0.674 ms med 0.004 ms std 3.797 B lstat file cnt 18486 min 0.007 ms max 36.418 ms avg 0.049 ms med 0.026 ms std 0.732 C open file cnt 14540 min 0.014 ms max 0.184 ms avg 0.021 ms med 0.018 ms std 0.010 D rd 1st byte cnt 14540 min 0.175 ms max 2119.890 ms avg 5.950 ms med 0.366 ms std 20.820 E read rate 6.730 MB/s (data) 2.395 MB/s (readdir + open + 1st byte + data) Linux 2.6.31.2-test atime barrier=1 fs=ext4 disk=HDD journal=int data=journal scheduler=deadline ************************************************************************************** 1 readers (30s) ---------------------------------------------------------------------- A read dir cnt 27881 min 0.001 ms max 58.102 ms avg 0.057 ms med 0.004 ms std 0.650 B lstat file cnt 26052 min 0.007 ms max 19.004 ms avg 0.033 ms med 0.025 ms std 0.341 C open file cnt 20561 min 0.014 ms max 0.237 ms avg 0.021 ms med 0.018 ms std 0.010 D rd 1st byte cnt 20561 min 0.170 ms max 21.588 ms avg 0.601 ms med 0.281 ms std 1.374 E read rate 39.369 MB/s (data) 18.481 MB/s (readdir + open + 1st byte + data) 3 readers (30s) ---------------------------------------------------------------------- A read dir cnt 3649 min 0.001 ms max 56.676 ms avg 1.113 ms med 0.004 ms std 4.939 B lstat file cnt 3390 min 0.007 ms max 25.870 ms avg 0.045 ms med 0.026 ms std 0.609 C open file cnt 2615 min 0.015 ms max 0.292 ms avg 0.021 ms med 0.018 ms std 0.011 D rd 1st byte cnt 2615 min 0.188 ms max 62.661 ms avg 5.921 ms med 0.374 ms std 9.864 E read rate 6.485 MB/s (data) 2.185 MB/s (readdir + open + 1st byte + data) 3 readers, 3 writers (30s) ---------------------------------------------------------------------- F write open cnt 343 min 0.042 ms max 0.684 ms avg 0.049 ms med 0.046 ms std 0.035 G wr 1st byte cnt 343 min 0.006 ms max 0.014 ms avg 0.007 ms med 0.007 ms std 0.001 H write close cnt 343 min 0.017 ms max 0.113 ms avg 0.023 ms med 0.022 ms std 0.007 I mkdir cnt 19 min 0.027 ms max 57485.053 ms avg 3940.046 ms med 0.033 ms std 12934.447 J write rate 376.226 MB/s (data) 197.347 MB/s (open + 1st byte + data + close) A read dir cnt 9940 min 0.001 ms max 53.383 ms avg 0.713 ms med 0.004 ms std 3.840 B lstat file cnt 9266 min 0.007 ms max 31.904 ms avg 0.052 ms med 0.026 ms std 0.756 C open file cnt 7246 min 0.015 ms max 0.301 ms avg 0.021 ms med 0.018 ms std 0.012 D rd 1st byte cnt 7246 min 0.172 ms max 231.426 ms avg 5.625 ms med 0.352 ms std 11.823 E read rate 6.924 MB/s (data) 2.515 MB/s (readdir + open + 1st byte + data) Linux 2.6.31.2-test relatime barrier=0 fs=ext4 disk=HDD journal=int data=ordered scheduler=cfq ************************************************************************************** 1 readers (30s) ---------------------------------------------------------------------- A read dir cnt 27680 min 0.001 ms max 49.874 ms avg 0.061 ms med 0.004 ms std 0.665 B lstat file cnt 25863 min 0.006 ms max 21.606 ms avg 0.031 ms med 0.024 ms std 0.287 C open file cnt 20413 min 0.014 ms max 0.187 ms avg 0.021 ms med 0.018 ms std 0.010 D rd 1st byte cnt 20413 min 0.174 ms max 21.563 ms avg 0.609 ms med 0.283 ms std 1.403 E read rate 39.442 MB/s (data) 18.314 MB/s (readdir + open + 1st byte + data) 3 readers (30s) ---------------------------------------------------------------------- A read dir cnt 3758 min 0.001 ms max 57.168 ms avg 0.909 ms med 0.004 ms std 4.355 B lstat file cnt 3490 min 0.007 ms max 34.707 ms avg 0.058 ms med 0.026 ms std 0.933 C open file cnt 2685 min 0.015 ms max 0.145 ms avg 0.020 ms med 0.018 ms std 0.010 D rd 1st byte cnt 2685 min 0.175 ms max 68.601 ms avg 5.929 ms med 0.386 ms std 9.744 E read rate 6.448 MB/s (data) 2.211 MB/s (readdir + open + 1st byte + data) 3 readers, 3 writers (30s) ---------------------------------------------------------------------- F write open cnt 127 min 0.041 ms max 18751.395 ms avg 147.696 ms med 0.047 ms std 1657.349 G wr 1st byte cnt 127 min 0.006 ms max 0.022 ms avg 0.007 ms med 0.007 ms std 0.001 H write close cnt 127 min 0.012 ms max 0.028 ms avg 0.016 ms med 0.016 ms std 0.003 I mkdir cnt 7 min 0.036 ms max 0.049 ms avg 0.041 ms med 0.042 ms std 0.005 J write rate 653.835 MB/s (data) 0.316 MB/s (open + 1st byte + data + close) A read dir cnt 4532 min 0.001 ms max 48.599 ms avg 0.511 ms med 0.004 ms std 3.177 B lstat file cnt 4224 min 0.007 ms max 34.647 ms avg 0.049 ms med 0.026 ms std 0.687 C open file cnt 3303 min 0.014 ms max 0.150 ms avg 0.020 ms med 0.018 ms std 0.009 D rd 1st byte cnt 3303 min 0.185 ms max 320.613 ms avg 5.793 ms med 0.363 ms std 12.068 E read rate 6.748 MB/s (data) 2.466 MB/s (readdir + open + 1st byte + data) Linux 2.6.31.2-test atime barrier=0 fs=ext4 disk=HDD journal=int data=ordered scheduler=cfq ************************************************************************************** 1 readers (30s) ---------------------------------------------------------------------- A read dir cnt 28153 min 0.001 ms max 49.783 ms avg 0.052 ms med 0.004 ms std 0.592 B lstat file cnt 26306 min 0.006 ms max 18.296 ms avg 0.031 ms med 0.024 ms std 0.269 C open file cnt 20767 min 0.014 ms max 0.187 ms avg 0.021 ms med 0.018 ms std 0.010 D rd 1st byte cnt 20767 min 0.174 ms max 21.445 ms avg 0.605 ms med 0.280 ms std 1.403 E read rate 39.937 MB/s (data) 18.640 MB/s (readdir + open + 1st byte + data) 3 readers (30s) ---------------------------------------------------------------------- A read dir cnt 3429 min 0.001 ms max 63.152 ms avg 1.081 ms med 0.004 ms std 4.688 B lstat file cnt 3185 min 0.007 ms max 28.211 ms avg 0.050 ms med 0.026 ms std 0.742 C open file cnt 2458 min 0.014 ms max 0.160 ms avg 0.020 ms med 0.018 ms std 0.010 D rd 1st byte cnt 2458 min 0.180 ms max 65.384 ms avg 6.409 ms med 0.579 ms std 9.872 E read rate 5.983 MB/s (data) 2.034 MB/s (readdir + open + 1st byte + data) 3 readers, 3 writers (30s) ---------------------------------------------------------------------- F write open cnt 38269 min 0.039 ms max 8096.975 ms avg 0.261 ms med 0.042 ms std 41.394 G wr 1st byte cnt 38269 min 0.006 ms max 0.514 ms avg 0.007 ms med 0.006 ms std 0.006 H write close cnt 38269 min 0.011 ms max 1418.834 ms avg 0.065 ms med 0.014 ms std 7.719 I mkdir cnt 3460 min 0.024 ms max 25.562 ms avg 0.049 ms med 0.029 ms std 0.596 J write rate 11.055 MB/s (data) 10.043 MB/s (open + 1st byte + data + close) A read dir cnt 17150 min 0.001 ms max 127.563 ms avg 0.829 ms med 0.004 ms std 4.366 B lstat file cnt 16002 min 0.007 ms max 100.111 ms avg 0.053 ms med 0.026 ms std 1.053 C open file cnt 12560 min 0.014 ms max 0.251 ms avg 0.020 ms med 0.018 ms std 0.010 D rd 1st byte cnt 12560 min 0.174 ms max 395.045 ms avg 6.160 ms med 0.377 ms std 12.204 E read rate 6.598 MB/s (data) 2.303 MB/s (readdir + open + 1st byte + data) Linux 2.6.31.2-test relatime barrier=1 fs=ext4 disk=HDD journal=int data=ordered scheduler=cfq ************************************************************************************** 1 readers (30s) ---------------------------------------------------------------------- A read dir cnt 28000 min 0.001 ms max 49.880 ms avg 0.054 ms med 0.004 ms std 0.601 B lstat file cnt 26163 min 0.006 ms max 18.289 ms avg 0.032 ms med 0.025 ms std 0.300 C open file cnt 20651 min 0.014 ms max 0.199 ms avg 0.021 ms med 0.018 ms std 0.011 D rd 1st byte cnt 20651 min 0.173 ms max 26.016 ms avg 0.604 ms med 0.278 ms std 1.397 E read rate 39.585 MB/s (data) 18.532 MB/s (readdir + open + 1st byte + data) 3 readers (30s) ---------------------------------------------------------------------- A read dir cnt 3779 min 0.001 ms max 77.207 ms avg 0.882 ms med 0.004 ms std 4.403 B lstat file cnt 3506 min 0.007 ms max 27.206 ms avg 0.045 ms med 0.026 ms std 0.632 C open file cnt 2690 min 0.015 ms max 0.096 ms avg 0.021 ms med 0.018 ms std 0.010 D rd 1st byte cnt 2690 min 0.177 ms max 74.888 ms avg 5.841 ms med 0.382 ms std 9.961 E read rate 6.307 MB/s (data) 2.231 MB/s (readdir + open + 1st byte + data) 3 readers, 3 writers (30s) ---------------------------------------------------------------------- F write open cnt 32 min 0.041 ms max 0.055 ms avg 0.045 ms med 0.044 ms std 0.003 G wr 1st byte cnt 32 min 0.006 ms max 0.009 ms avg 0.007 ms med 0.007 ms std 0.001 H write close cnt 32 min 0.011 ms max 0.022 ms avg 0.015 ms med 0.015 ms std 0.003 I mkdir cnt 1 min 0.055 ms max 0.055 ms avg 0.055 ms med 0.055 ms std 0.000 J write rate 772.560 MB/s (data) 469.498 MB/s (open + 1st byte + data + close) A read dir cnt 4179 min 0.001 ms max 72.282 ms avg 0.685 ms med 0.004 ms std 4.014 B lstat file cnt 3891 min 0.007 ms max 23.203 ms avg 0.049 ms med 0.026 ms std 0.636 C open file cnt 3029 min 0.015 ms max 0.295 ms avg 0.021 ms med 0.018 ms std 0.012 D rd 1st byte cnt 3029 min 0.177 ms max 216.846 ms avg 5.641 ms med 0.359 ms std 11.661 E read rate 7.140 MB/s (data) 2.524 MB/s (readdir + open + 1st byte + data) Linux 2.6.31.2-test atime barrier=1 fs=ext4 disk=HDD journal=int data=ordered scheduler=cfq ************************************************************************************** 1 readers (30s) ---------------------------------------------------------------------- A read dir cnt 27073 min 0.001 ms max 78.766 ms avg 0.055 ms med 0.004 ms std 0.757 B lstat file cnt 25303 min 0.007 ms max 21.572 ms avg 0.033 ms med 0.024 ms std 0.340 C open file cnt 19986 min 0.014 ms max 0.240 ms avg 0.021 ms med 0.018 ms std 0.010 D rd 1st byte cnt 19986 min 0.174 ms max 78.220 ms avg 0.617 ms med 0.279 ms std 1.672 E read rate 37.603 MB/s (data) 17.888 MB/s (readdir + open + 1st byte + data) 3 readers (30s) ---------------------------------------------------------------------- A read dir cnt 3305 min 0.001 ms max 109.403 ms avg 1.197 ms med 0.004 ms std 5.459 B lstat file cnt 3072 min 0.007 ms max 35.442 ms avg 0.052 ms med 0.026 ms std 0.852 C open file cnt 2372 min 0.015 ms max 0.132 ms avg 0.020 ms med 0.018 ms std 0.010 D rd 1st byte cnt 2372 min 0.183 ms max 137.622 ms avg 6.557 ms med 0.579 ms std 10.943 E read rate 5.779 MB/s (data) 1.957 MB/s (readdir + open + 1st byte + data) 3 readers, 3 writers (30s) ---------------------------------------------------------------------- F write open cnt 332 min 0.041 ms max 10235.850 ms avg 50.815 ms med 0.045 ms std 665.872 G wr 1st byte cnt 332 min 0.006 ms max 0.018 ms avg 0.007 ms med 0.007 ms std 0.001 H write close cnt 332 min 0.011 ms max 0.031 ms avg 0.015 ms med 0.016 ms std 0.003 I mkdir cnt 32 min 0.028 ms max 13390.735 ms avg 418.495 ms med 0.033 ms std 2329.883 J write rate 614.037 MB/s (data) 0.650 MB/s (open + 1st byte + data + close) A read dir cnt 4355 min 0.001 ms max 61.631 ms avg 0.379 ms med 0.004 ms std 2.916 B lstat file cnt 4067 min 0.007 ms max 24.374 ms avg 0.047 ms med 0.026 ms std 0.648 C open file cnt 3200 min 0.015 ms max 0.148 ms avg 0.020 ms med 0.018 ms std 0.011 D rd 1st byte cnt 3200 min 0.181 ms max 309.492 ms avg 5.765 ms med 0.356 ms std 11.901 E read rate 6.478 MB/s (data) 2.426 MB/s (readdir + open + 1st byte + data) Linux 2.6.31.2-test relatime barrier=0 fs=ext4 disk=HDD journal=int data=ordered scheduler=deadline ************************************************************************************** 1 readers (30s) ---------------------------------------------------------------------- A read dir cnt 28192 min 0.001 ms max 49.746 ms avg 0.051 ms med 0.004 ms std 0.582 B lstat file cnt 26343 min 0.006 ms max 18.381 ms avg 0.031 ms med 0.024 ms std 0.279 C open file cnt 20796 min 0.014 ms max 0.256 ms avg 0.021 ms med 0.018 ms std 0.010 D rd 1st byte cnt 20796 min 0.175 ms max 21.554 ms avg 0.602 ms med 0.278 ms std 1.395 E read rate 39.723 MB/s (data) 18.681 MB/s (readdir + open + 1st byte + data) 3 readers (30s) ---------------------------------------------------------------------- A read dir cnt 3831 min 0.001 ms max 38.162 ms avg 0.838 ms med 0.004 ms std 4.047 B lstat file cnt 3555 min 0.007 ms max 23.338 ms avg 0.046 ms med 0.026 ms std 0.644 C open file cnt 2730 min 0.015 ms max 0.098 ms avg 0.020 ms med 0.018 ms std 0.009 D rd 1st byte cnt 2730 min 0.176 ms max 77.383 ms avg 5.751 ms med 0.377 ms std 9.702 E read rate 6.273 MB/s (data) 2.247 MB/s (readdir + open + 1st byte + data) 3 readers, 3 writers (30s) ---------------------------------------------------------------------- F write open cnt 255 min 0.040 ms max 13.727 ms avg 0.148 ms med 0.045 ms std 1.107 G wr 1st byte cnt 255 min 0.006 ms max 0.019 ms avg 0.007 ms med 0.007 ms std 0.001 H write close cnt 255 min 0.011 ms max 0.029 ms avg 0.015 ms med 0.015 ms std 0.003 I mkdir cnt 23 min 0.025 ms max 11191.031 ms avg 946.475 ms med 0.034 ms std 3068.154 J write rate 721.212 MB/s (data) 186.144 MB/s (open + 1st byte + data + close) A read dir cnt 4554 min 0.001 ms max 91.308 ms avg 0.734 ms med 0.004 ms std 4.310 B lstat file cnt 4237 min 0.006 ms max 36.274 ms avg 0.063 ms med 0.026 ms std 0.968 C open file cnt 3288 min 0.015 ms max 0.296 ms avg 0.020 ms med 0.018 ms std 0.012 D rd 1st byte cnt 3288 min 0.178 ms max 240.310 ms avg 5.931 ms med 0.370 ms std 11.251 E read rate 6.388 MB/s (data) 2.337 MB/s (readdir + open + 1st byte + data) Linux 2.6.31.2-test atime barrier=0 fs=ext4 disk=HDD journal=int data=ordered scheduler=deadline ************************************************************************************** 1 readers (30s) ---------------------------------------------------------------------- A read dir cnt 28125 min 0.001 ms max 49.738 ms avg 0.051 ms med 0.004 ms std 0.576 B lstat file cnt 26280 min 0.006 ms max 21.593 ms avg 0.033 ms med 0.024 ms std 0.338 C open file cnt 20745 min 0.014 ms max 0.611 ms avg 0.021 ms med 0.018 ms std 0.012 D rd 1st byte cnt 20745 min 0.175 ms max 21.469 ms avg 0.599 ms med 0.280 ms std 1.384 E read rate 39.685 MB/s (data) 18.711 MB/s (readdir + open + 1st byte + data) 3 readers (30s) ---------------------------------------------------------------------- A read dir cnt 3575 min 0.001 ms max 74.072 ms avg 1.085 ms med 0.004 ms std 4.905 B lstat file cnt 3322 min 0.007 ms max 39.468 ms avg 0.054 ms med 0.026 ms std 0.924 C open file cnt 2565 min 0.015 ms max 0.132 ms avg 0.020 ms med 0.018 ms std 0.010 D rd 1st byte cnt 2565 min 0.178 ms max 91.870 ms avg 6.016 ms med 0.372 ms std 10.113 E read rate 6.167 MB/s (data) 2.127 MB/s (readdir + open + 1st byte + data) 3 readers, 3 writers (30s) ---------------------------------------------------------------------- F write open cnt 59 min 0.042 ms max 0.061 ms avg 0.047 ms med 0.046 ms std 0.004 G wr 1st byte cnt 59 min 0.006 ms max 0.012 ms avg 0.006 ms med 0.006 ms std 0.001 H write close cnt 59 min 0.012 ms max 0.551 ms avg 0.025 ms med 0.015 ms std 0.069 I mkdir cnt 4 min 0.028 ms max 0.063 ms avg 0.039 ms med 0.034 ms std 0.014 J write rate 558.301 MB/s (data) 188.045 MB/s (open + 1st byte + data + close) A read dir cnt 11853 min 0.001 ms max 106.175 ms avg 0.852 ms med 0.004 ms std 4.515 B lstat file cnt 11062 min 0.006 ms max 200.065 ms avg 0.107 ms med 0.026 ms std 2.766 C open file cnt 8699 min 0.014 ms max 0.162 ms avg 0.020 ms med 0.018 ms std 0.010 D rd 1st byte cnt 8699 min 0.176 ms max 283.402 ms avg 5.934 ms med 0.362 ms std 12.705 E read rate 6.869 MB/s (data) 2.371 MB/s (readdir + open + 1st byte + data) Linux 2.6.31.2-test relatime barrier=1 fs=ext4 disk=HDD journal=int data=ordered scheduler=deadline ************************************************************************************** 1 readers (30s) ---------------------------------------------------------------------- A read dir cnt 27300 min 0.001 ms max 49.668 ms avg 0.057 ms med 0.004 ms std 0.675 B lstat file cnt 25510 min 0.006 ms max 18.258 ms avg 0.033 ms med 0.024 ms std 0.324 C open file cnt 20132 min 0.014 ms max 0.257 ms avg 0.021 ms med 0.018 ms std 0.010 D rd 1st byte cnt 20132 min 0.171 ms max 75.245 ms avg 0.621 ms med 0.285 ms std 1.666 E read rate 38.811 MB/s (data) 18.096 MB/s (readdir + open + 1st byte + data) 3 readers (30s) ---------------------------------------------------------------------- A read dir cnt 3525 min 0.001 ms max 56.360 ms avg 1.195 ms med 0.004 ms std 5.000 B lstat file cnt 3275 min 0.007 ms max 33.870 ms avg 0.048 ms med 0.026 ms std 0.750 C open file cnt 2524 min 0.015 ms max 0.149 ms avg 0.021 ms med 0.018 ms std 0.011 D rd 1st byte cnt 2524 min 0.178 ms max 74.890 ms avg 6.183 ms med 0.445 ms std 10.082 E read rate 6.313 MB/s (data) 2.073 MB/s (readdir + open + 1st byte + data) 3 readers, 3 writers (30s) ---------------------------------------------------------------------- F write open cnt 178 min 0.041 ms max 19.547 ms avg 0.262 ms med 0.046 ms std 2.019 G wr 1st byte cnt 178 min 0.006 ms max 0.016 ms avg 0.007 ms med 0.007 ms std 0.001 H write close cnt 178 min 0.011 ms max 0.478 ms avg 0.019 ms med 0.016 ms std 0.035 I mkdir cnt 4 min 0.039 ms max 26672.469 ms avg 9019.467 ms med 9405.313 ms std 10891.250 J write rate 611.978 MB/s (data) 123.609 MB/s (open + 1st byte + data + close) A read dir cnt 4692 min 0.001 ms max 106.569 ms avg 0.790 ms med 0.004 ms std 4.238 B lstat file cnt 4375 min 0.007 ms max 28.528 ms avg 0.058 ms med 0.026 ms std 0.863 C open file cnt 3422 min 0.015 ms max 0.149 ms avg 0.020 ms med 0.018 ms std 0.010 D rd 1st byte cnt 3422 min 0.177 ms max 236.512 ms avg 6.090 ms med 0.381 ms std 11.081 E read rate 6.594 MB/s (data) 2.285 MB/s (readdir + open + 1st byte + data) Linux 2.6.31.2-test atime barrier=1 fs=ext4 disk=HDD journal=int data=ordered scheduler=deadline ************************************************************************************** 1 readers (30s) ---------------------------------------------------------------------- A read dir cnt 27072 min 0.001 ms max 82.315 ms avg 0.059 ms med 0.004 ms std 0.867 B lstat file cnt 25295 min 0.006 ms max 20.667 ms avg 0.032 ms med 0.025 ms std 0.318 C open file cnt 19964 min 0.014 ms max 0.205 ms avg 0.020 ms med 0.018 ms std 0.010 D rd 1st byte cnt 19964 min 0.168 ms max 100.376 ms avg 0.635 ms med 0.282 ms std 2.089 E read rate 38.758 MB/s (data) 17.846 MB/s (readdir + open + 1st byte + data) 3 readers (30s) ---------------------------------------------------------------------- A read dir cnt 3657 min 0.001 ms max 139.503 ms avg 1.096 ms med 0.004 ms std 5.303 B lstat file cnt 3399 min 0.007 ms max 25.444 ms avg 0.043 ms med 0.026 ms std 0.603 C open file cnt 2627 min 0.015 ms max 0.092 ms avg 0.021 ms med 0.018 ms std 0.010 D rd 1st byte cnt 2627 min 0.182 ms max 123.917 ms avg 5.849 ms med 0.368 ms std 10.784 E read rate 6.307 MB/s (data) 2.165 MB/s (readdir + open + 1st byte + data) 3 readers, 3 writers (30s) ---------------------------------------------------------------------- F write open cnt 211 min 0.042 ms max 10.521 ms avg 0.097 ms med 0.046 ms std 0.719 G wr 1st byte cnt 211 min 0.006 ms max 0.070 ms avg 0.007 ms med 0.007 ms std 0.004 H write close cnt 211 min 0.012 ms max 3.919 ms avg 0.034 ms med 0.015 ms std 0.268 I mkdir cnt 12 min 0.029 ms max 38119.338 ms avg 3176.646 ms med 0.036 ms std 10535.618 J write rate 612.383 MB/s (data) 153.495 MB/s (open + 1st byte + data + close) A read dir cnt 7483 min 0.001 ms max 88.376 ms avg 0.658 ms med 0.004 ms std 3.736 B lstat file cnt 6968 min 0.006 ms max 118.301 ms avg 0.069 ms med 0.026 ms std 1.627 C open file cnt 5423 min 0.015 ms max 0.178 ms avg 0.020 ms med 0.018 ms std 0.010 D rd 1st byte cnt 5423 min 0.180 ms max 199.840 ms avg 5.852 ms med 0.366 ms std 11.149 E read rate 6.777 MB/s (data) 2.496 MB/s (readdir + open + 1st byte + data) Linux 2.6.31.2-test relatime barrier=0 fs=ext4 disk=HDD journal=int data=writeback scheduler=cfq ************************************************************************************** 1 readers (30s) ---------------------------------------------------------------------- A read dir cnt 26970 min 0.001 ms max 57.964 ms avg 0.057 ms med 0.004 ms std 0.651 B lstat file cnt 25205 min 0.006 ms max 21.581 ms avg 0.033 ms med 0.024 ms std 0.347 C open file cnt 19911 min 0.014 ms max 0.237 ms avg 0.021 ms med 0.018 ms std 0.010 D rd 1st byte cnt 19911 min 0.172 ms max 105.981 ms avg 0.631 ms med 0.282 ms std 2.090 E read rate 38.223 MB/s (data) 17.799 MB/s (readdir + open + 1st byte + data) 3 readers (30s) ---------------------------------------------------------------------- A read dir cnt 3480 min 0.001 ms max 98.916 ms avg 1.119 ms med 0.004 ms std 5.081 B lstat file cnt 3233 min 0.007 ms max 28.006 ms avg 0.051 ms med 0.026 ms std 0.790 C open file cnt 2497 min 0.014 ms max 0.098 ms avg 0.021 ms med 0.018 ms std 0.010 D rd 1st byte cnt 2497 min 0.185 ms max 170.663 ms avg 6.293 ms med 0.414 ms std 11.229 E read rate 6.190 MB/s (data) 2.072 MB/s (readdir + open + 1st byte + data) 3 readers, 3 writers (30s) ---------------------------------------------------------------------- F write open cnt 13876 min 0.040 ms max 31.304 ms avg 0.054 ms med 0.045 ms std 0.358 G wr 1st byte cnt 13876 min 0.006 ms max 0.380 ms avg 0.007 ms med 0.007 ms std 0.006 H write close cnt 13876 min 0.011 ms max 0.543 ms avg 0.016 ms med 0.016 ms std 0.009 I mkdir cnt 1285 min 0.025 ms max 37.953 ms avg 0.105 ms med 0.032 ms std 1.358 J write rate 4.671 MB/s (data) 4.625 MB/s (open + 1st byte + data + close) A read dir cnt 13289 min 0.001 ms max 116.395 ms avg 0.726 ms med 0.004 ms std 4.037 B lstat file cnt 12395 min 0.006 ms max 39.166 ms avg 0.055 ms med 0.026 ms std 0.871 C open file cnt 9710 min 0.014 ms max 0.249 ms avg 0.020 ms med 0.018 ms std 0.011 D rd 1st byte cnt 9710 min 0.177 ms max 264.967 ms avg 6.185 ms med 0.371 ms std 12.344 E read rate 6.435 MB/s (data) 2.304 MB/s (readdir + open + 1st byte + data) Linux 2.6.31.2-test atime barrier=0 fs=ext4 disk=HDD journal=int data=writeback scheduler=cfq ************************************************************************************** 1 readers (30s) ---------------------------------------------------------------------- A read dir cnt 27713 min 0.001 ms max 49.681 ms avg 0.050 ms med 0.004 ms std 0.573 B lstat file cnt 25894 min 0.006 ms max 75.747 ms avg 0.035 ms med 0.024 ms std 0.563 C open file cnt 20437 min 0.014 ms max 0.200 ms avg 0.021 ms med 0.018 ms std 0.010 D rd 1st byte cnt 20437 min 0.173 ms max 83.044 ms avg 0.608 ms med 0.279 ms std 1.693 E read rate 38.894 MB/s (data) 18.422 MB/s (readdir + open + 1st byte + data) 3 readers (30s) ---------------------------------------------------------------------- A read dir cnt 3802 min 0.001 ms max 67.191 ms avg 0.937 ms med 0.004 ms std 4.557 B lstat file cnt 3529 min 0.007 ms max 36.538 ms avg 0.052 ms med 0.026 ms std 0.869 C open file cnt 2711 min 0.015 ms max 0.152 ms avg 0.020 ms med 0.018 ms std 0.010 D rd 1st byte cnt 2711 min 0.175 ms max 68.540 ms avg 5.829 ms med 0.378 ms std 9.777 E read rate 6.509 MB/s (data) 2.233 MB/s (readdir + open + 1st byte + data) 3 readers, 3 writers (30s) ---------------------------------------------------------------------- F write open cnt 14083 min 0.039 ms max 49.353 ms avg 0.063 ms med 0.044 ms std 0.653 G wr 1st byte cnt 14083 min 0.006 ms max 0.164 ms avg 0.007 ms med 0.007 ms std 0.005 H write close cnt 14083 min 0.011 ms max 93523.374 ms avg 6.657 ms med 0.015 ms std 788.056 I mkdir cnt 1319 min 0.025 ms max 1003.834 ms avg 0.806 ms med 0.032 ms std 27.630 J write rate 16.073 MB/s (data) 4.050 MB/s (open + 1st byte + data + close) A read dir cnt 15807 min 0.001 ms max 97.840 ms avg 0.883 ms med 0.004 ms std 4.572 B lstat file cnt 14752 min 0.006 ms max 100.043 ms avg 0.088 ms med 0.026 ms std 2.033 C open file cnt 11590 min 0.014 ms max 0.187 ms avg 0.020 ms med 0.018 ms std 0.010 D rd 1st byte cnt 11590 min 0.175 ms max 426.133 ms avg 5.775 ms med 0.366 ms std 11.072 E read rate 6.601 MB/s (data) 2.363 MB/s (readdir + open + 1st byte + data) Linux 2.6.31.2-test relatime barrier=1 fs=ext4 disk=HDD journal=int data=writeback scheduler=cfq ************************************************************************************** 1 readers (30s) ---------------------------------------------------------------------- A read dir cnt 27009 min 0.001 ms max 49.892 ms avg 0.054 ms med 0.004 ms std 0.606 B lstat file cnt 25241 min 0.007 ms max 27.886 ms avg 0.033 ms med 0.025 ms std 0.340 C open file cnt 19941 min 0.014 ms max 0.256 ms avg 0.021 ms med 0.018 ms std 0.011 D rd 1st byte cnt 19941 min 0.174 ms max 104.823 ms avg 0.622 ms med 0.282 ms std 1.884 E read rate 37.540 MB/s (data) 17.807 MB/s (readdir + open + 1st byte + data) 3 readers (30s) ---------------------------------------------------------------------- A read dir cnt 3594 min 0.001 ms max 55.410 ms avg 1.024 ms med 0.004 ms std 4.627 B lstat file cnt 3339 min 0.007 ms max 28.209 ms avg 0.047 ms med 0.026 ms std 0.693 C open file cnt 2576 min 0.015 ms max 0.184 ms avg 0.021 ms med 0.018 ms std 0.011 D rd 1st byte cnt 2576 min 0.183 ms max 82.801 ms avg 6.032 ms med 0.402 ms std 9.875 E read rate 6.181 MB/s (data) 2.153 MB/s (readdir + open + 1st byte + data) 3 readers, 3 writers (30s) ---------------------------------------------------------------------- F write open cnt 54 min 0.042 ms max 2010.925 ms avg 40.971 ms med 0.047 ms std 271.920 G wr 1st byte cnt 54 min 0.006 ms max 0.073 ms avg 0.008 ms med 0.007 ms std 0.009 H write close cnt 54 min 0.012 ms max 0.635 ms avg 0.027 ms med 0.015 ms std 0.084 I mkdir cnt 4 min 0.030 ms max 0.060 ms avg 0.042 ms med 0.046 ms std 0.012 J write rate 660.318 MB/s (data) 0.703 MB/s (open + 1st byte + data + close) A read dir cnt 4485 min 0.001 ms max 436.007 ms avg 0.879 ms med 0.004 ms std 7.726 B lstat file cnt 4180 min 0.007 ms max 28.124 ms avg 0.059 ms med 0.027 ms std 0.872 C open file cnt 3262 min 0.014 ms max 0.143 ms avg 0.020 ms med 0.018 ms std 0.009 D rd 1st byte cnt 3262 min 0.181 ms max 630.334 ms avg 6.077 ms med 0.381 ms std 19.340 E read rate 6.561 MB/s (data) 2.263 MB/s (readdir + open + 1st byte + data) Linux 2.6.31.2-test atime barrier=1 fs=ext4 disk=HDD journal=int data=writeback scheduler=cfq ************************************************************************************** 1 readers (30s) ---------------------------------------------------------------------- A read dir cnt 27078 min 0.001 ms max 92.154 ms avg 0.055 ms med 0.004 ms std 0.811 B lstat file cnt 25308 min 0.006 ms max 18.758 ms avg 0.031 ms med 0.024 ms std 0.282 C open file cnt 19991 min 0.014 ms max 0.206 ms avg 0.021 ms med 0.018 ms std 0.011 D rd 1st byte cnt 19991 min 0.174 ms max 104.346 ms avg 0.622 ms med 0.282 ms std 1.843 E read rate 37.942 MB/s (data) 17.900 MB/s (readdir + open + 1st byte + data) 3 readers (30s) ---------------------------------------------------------------------- A read dir cnt 3652 min 0.001 ms max 91.981 ms avg 0.966 ms med 0.004 ms std 4.834 B lstat file cnt 3392 min 0.007 ms max 28.170 ms avg 0.045 ms med 0.026 ms std 0.636 C open file cnt 2616 min 0.015 ms max 0.179 ms avg 0.021 ms med 0.018 ms std 0.010 D rd 1st byte cnt 2616 min 0.180 ms max 121.760 ms avg 5.994 ms med 0.375 ms std 10.551 E read rate 6.243 MB/s (data) 2.178 MB/s (readdir + open + 1st byte + data) 3 readers, 3 writers (30s) ---------------------------------------------------------------------- F write open cnt 14029 min 0.039 ms max 50592.214 ms avg 3.685 ms med 0.045 ms std 427.135 G wr 1st byte cnt 14029 min 0.006 ms max 0.224 ms avg 0.007 ms med 0.007 ms std 0.005 H write close cnt 14029 min 0.011 ms max 39562.261 ms avg 2.836 ms med 0.016 ms std 334.004 I mkdir cnt 1297 min 0.025 ms max 355.674 ms avg 0.324 ms med 0.032 ms std 9.882 J write rate 677.143 MB/s (data) 5.555 MB/s (open + 1st byte + data + close) A read dir cnt 12708 min 0.001 ms max 129.019 ms avg 0.794 ms med 0.004 ms std 4.274 B lstat file cnt 11857 min 0.007 ms max 199.964 ms avg 0.066 ms med 0.026 ms std 1.983 C open file cnt 9301 min 0.015 ms max 0.200 ms avg 0.020 ms med 0.018 ms std 0.011 D rd 1st byte cnt 9301 min 0.174 ms max 294.147 ms avg 5.803 ms med 0.369 ms std 11.681 E read rate 6.886 MB/s (data) 2.420 MB/s (readdir + open + 1st byte + data) Linux 2.6.31.2-test relatime barrier=0 fs=ext4 disk=HDD journal=int data=writeback scheduler=deadline ************************************************************************************** 1 readers (30s) ---------------------------------------------------------------------- A read dir cnt 27018 min 0.001 ms max 105.691 ms avg 0.054 ms med 0.004 ms std 0.880 B lstat file cnt 25250 min 0.006 ms max 18.244 ms avg 0.032 ms med 0.025 ms std 0.304 C open file cnt 19947 min 0.014 ms max 0.180 ms avg 0.021 ms med 0.018 ms std 0.010 D rd 1st byte cnt 19947 min 0.174 ms max 101.908 ms avg 0.628 ms med 0.283 ms std 2.102 E read rate 37.952 MB/s (data) 17.818 MB/s (readdir + open + 1st byte + data) 3 readers (30s) ---------------------------------------------------------------------- A read dir cnt 3610 min 0.001 ms max 124.762 ms avg 1.060 ms med 0.004 ms std 5.508 B lstat file cnt 3354 min 0.007 ms max 36.376 ms avg 0.049 ms med 0.026 ms std 0.798 C open file cnt 2588 min 0.015 ms max 0.127 ms avg 0.021 ms med 0.018 ms std 0.010 D rd 1st byte cnt 2588 min 0.186 ms max 97.761 ms avg 5.909 ms med 0.388 ms std 10.347 E read rate 6.101 MB/s (data) 2.142 MB/s (readdir + open + 1st byte + data) 3 readers, 3 writers (30s) ---------------------------------------------------------------------- F write open cnt 13443 min 0.039 ms max 76.406 ms avg 0.062 ms med 0.045 ms std 0.741 G wr 1st byte cnt 13443 min 0.006 ms max 0.362 ms avg 0.007 ms med 0.007 ms std 0.009 H write close cnt 13443 min 0.011 ms max 299.335 ms avg 0.039 ms med 0.016 ms std 2.582 I mkdir cnt 1221 min 0.025 ms max 46.880 ms avg 0.122 ms med 0.032 ms std 1.761 J write rate 5.080 MB/s (data) 5.006 MB/s (open + 1st byte + data + close) A read dir cnt 12943 min 0.001 ms max 67.704 ms avg 0.742 ms med 0.004 ms std 3.983 B lstat file cnt 12077 min 0.007 ms max 100.046 ms avg 0.059 ms med 0.026 ms std 1.196 C open file cnt 9481 min 0.015 ms max 0.262 ms avg 0.021 ms med 0.018 ms std 0.011 D rd 1st byte cnt 9481 min 0.175 ms max 324.386 ms avg 6.037 ms med 0.376 ms std 11.499 E read rate 6.450 MB/s (data) 2.327 MB/s (readdir + open + 1st byte + data) Linux 2.6.31.2-test atime barrier=0 fs=ext4 disk=HDD journal=int data=writeback scheduler=deadline ************************************************************************************** 1 readers (30s) ---------------------------------------------------------------------- A read dir cnt 26940 min 0.001 ms max 49.902 ms avg 0.055 ms med 0.004 ms std 0.599 B lstat file cnt 25175 min 0.006 ms max 17.836 ms avg 0.032 ms med 0.024 ms std 0.304 C open file cnt 19885 min 0.014 ms max 0.249 ms avg 0.021 ms med 0.018 ms std 0.010 D rd 1st byte cnt 19885 min 0.174 ms max 104.645 ms avg 0.628 ms med 0.281 ms std 1.965 E read rate 37.732 MB/s (data) 17.774 MB/s (readdir + open + 1st byte + data) 3 readers (30s) ---------------------------------------------------------------------- A read dir cnt 3620 min 0.001 ms max 157.201 ms avg 0.986 ms med 0.004 ms std 5.264 B lstat file cnt 3362 min 0.007 ms max 27.168 ms avg 0.048 ms med 0.026 ms std 0.698 C open file cnt 2590 min 0.015 ms max 0.103 ms avg 0.021 ms med 0.018 ms std 0.010 D rd 1st byte cnt 2590 min 0.179 ms max 133.040 ms avg 5.907 ms med 0.385 ms std 10.597 E read rate 6.023 MB/s (data) 2.167 MB/s (readdir + open + 1st byte + data) 3 readers, 3 writers (30s) ---------------------------------------------------------------------- F write open cnt 49 min 0.041 ms max 0.174 ms avg 0.056 ms med 0.045 ms std 0.029 G wr 1st byte cnt 49 min 0.006 ms max 0.013 ms avg 0.007 ms med 0.007 ms std 0.001 H write close cnt 49 min 0.012 ms max 0.166 ms avg 0.019 ms med 0.016 ms std 0.021 I mkdir cnt 3 min 0.028 ms max 0.058 ms avg 0.040 ms med 0.034 ms std 0.013 J write rate 0.013 MB/s (data) 0.013 MB/s (open + 1st byte + data + close) A read dir cnt 20865 min 0.001 ms max 102.156 ms avg 0.653 ms med 0.004 ms std 3.886 B lstat file cnt 19488 min 0.006 ms max 99.577 ms avg 0.057 ms med 0.026 ms std 1.089 C open file cnt 15358 min 0.014 ms max 0.273 ms avg 0.020 ms med 0.018 ms std 0.011 D rd 1st byte cnt 15358 min 0.176 ms max 313.942 ms avg 6.179 ms med 0.381 ms std 11.871 E read rate 6.688 MB/s (data) 2.341 MB/s (readdir + open + 1st byte + data) Linux 2.6.31.2-test relatime barrier=1 fs=ext4 disk=HDD journal=int data=writeback scheduler=deadline ************************************************************************************** 1 readers (30s) ---------------------------------------------------------------------- A read dir cnt 26574 min 0.001 ms max 94.140 ms avg 0.066 ms med 0.004 ms std 1.016 B lstat file cnt 24839 min 0.006 ms max 30.585 ms avg 0.034 ms med 0.024 ms std 0.375 C open file cnt 19628 min 0.014 ms max 0.148 ms avg 0.021 ms med 0.018 ms std 0.010 D rd 1st byte cnt 19628 min 0.175 ms max 90.696 ms avg 0.637 ms med 0.288 ms std 1.897 E read rate 38.168 MB/s (data) 17.557 MB/s (readdir + open + 1st byte + data) 3 readers (30s) ---------------------------------------------------------------------- A read dir cnt 3916 min 0.001 ms max 56.198 ms avg 0.969 ms med 0.004 ms std 4.562 B lstat file cnt 3636 min 0.007 ms max 24.438 ms avg 0.044 ms med 0.026 ms std 0.613 C open file cnt 2795 min 0.015 ms max 0.194 ms avg 0.021 ms med 0.018 ms std 0.011 D rd 1st byte cnt 2795 min 0.184 ms max 109.158 ms avg 5.421 ms med 0.358 ms std 10.470 E read rate 6.439 MB/s (data) 2.296 MB/s (readdir + open + 1st byte + data) 3 readers, 3 writers (30s) ---------------------------------------------------------------------- F write open cnt 11092 min 0.040 ms max 71728.057 ms avg 6.573 ms med 0.046 ms std 681.038 G wr 1st byte cnt 11092 min 0.006 ms max 0.385 ms avg 0.007 ms med 0.007 ms std 0.010 H write close cnt 11092 min 0.011 ms max 0.293 ms avg 0.016 ms med 0.016 ms std 0.012 I mkdir cnt 1018 min 0.025 ms max 67.095 ms avg 0.140 ms med 0.033 ms std 2.241 J write rate 631.387 MB/s (data) 5.463 MB/s (open + 1st byte + data + close) A read dir cnt 9924 min 0.001 ms max 74.155 ms avg 0.825 ms med 0.004 ms std 4.379 B lstat file cnt 9256 min 0.007 ms max 31.727 ms avg 0.053 ms med 0.026 ms std 0.803 C open file cnt 7251 min 0.015 ms max 0.179 ms avg 0.020 ms med 0.018 ms std 0.009 D rd 1st byte cnt 7251 min 0.176 ms max 409.998 ms avg 6.115 ms med 0.374 ms std 12.392 E read rate 6.708 MB/s (data) 2.339 MB/s (readdir + open + 1st byte + data) Linux 2.6.31.2-test atime barrier=1 fs=ext4 disk=HDD journal=int data=writeback scheduler=deadline ************************************************************************************** 1 readers (30s) ---------------------------------------------------------------------- A read dir cnt 28180 min 0.001 ms max 49.782 ms avg 0.050 ms med 0.004 ms std 0.560 B lstat file cnt 26332 min 0.006 ms max 18.662 ms avg 0.033 ms med 0.024 ms std 0.316 C open file cnt 20786 min 0.014 ms max 0.697 ms avg 0.021 ms med 0.017 ms std 0.012 D rd 1st byte cnt 20786 min 0.173 ms max 21.435 ms avg 0.603 ms med 0.283 ms std 1.390 E read rate 39.898 MB/s (data) 18.706 MB/s (readdir + open + 1st byte + data) 3 readers (30s) ---------------------------------------------------------------------- A read dir cnt 3622 min 0.001 ms max 60.951 ms avg 1.063 ms med 0.004 ms std 4.775 B lstat file cnt 3363 min 0.006 ms max 36.392 ms avg 0.048 ms med 0.026 ms std 0.755 C open file cnt 2591 min 0.014 ms max 0.178 ms avg 0.021 ms med 0.018 ms std 0.011 D rd 1st byte cnt 2591 min 0.179 ms max 66.326 ms avg 6.088 ms med 0.403 ms std 10.169 E read rate 6.528 MB/s (data) 2.179 MB/s (readdir + open + 1st byte + data) 3 readers, 3 writers (30s) ---------------------------------------------------------------------- F write open cnt 3677 min 0.040 ms max 169.321 ms avg 0.108 ms med 0.046 ms std 2.854 G wr 1st byte cnt 3677 min 0.006 ms max 0.219 ms avg 0.007 ms med 0.007 ms std 0.006 H write close cnt 3677 min 0.011 ms max 0.319 ms avg 0.017 ms med 0.016 ms std 0.011 I mkdir cnt 342 min 0.026 ms max 0.460 ms avg 0.037 ms med 0.034 ms std 0.024 J write rate 1.181 MB/s (data) 1.176 MB/s (open + 1st byte + data + close) A read dir cnt 13702 min 0.001 ms max 105.399 ms avg 0.897 ms med 0.004 ms std 4.524 B lstat file cnt 12785 min 0.006 ms max 399.757 ms avg 0.099 ms med 0.026 ms std 3.831 C open file cnt 10034 min 0.014 ms max 0.262 ms avg 0.020 ms med 0.018 ms std 0.010 D rd 1st byte cnt 10034 min 0.173 ms max 331.414 ms avg 5.958 ms med 0.362 ms std 13.207 E read rate 6.654 MB/s (data) 2.322 MB/s (readdir + open + 1st byte + data) Linux 2.6.31.2-test relatime barrier=0 fs=ext4 disk=HDD journal=int data=journal scheduler=cfq ************************************************************************************** 1 readers (30s) ---------------------------------------------------------------------- A read dir cnt 27800 min 0.001 ms max 49.762 ms avg 0.054 ms med 0.004 ms std 0.596 B lstat file cnt 25978 min 0.006 ms max 21.579 ms avg 0.033 ms med 0.024 ms std 0.325 C open file cnt 20510 min 0.014 ms max 0.238 ms avg 0.021 ms med 0.018 ms std 0.012 D rd 1st byte cnt 20510 min 0.171 ms max 21.351 ms avg 0.612 ms med 0.288 ms std 1.394 E read rate 39.743 MB/s (data) 18.472 MB/s (readdir + open + 1st byte + data) 3 readers (30s) ---------------------------------------------------------------------- A read dir cnt 3543 min 0.001 ms max 46.008 ms avg 0.889 ms med 0.004 ms std 4.262 B lstat file cnt 3292 min 0.007 ms max 28.604 ms avg 0.052 ms med 0.026 ms std 0.768 C open file cnt 2541 min 0.015 ms max 0.148 ms avg 0.020 ms med 0.018 ms std 0.010 D rd 1st byte cnt 2541 min 0.185 ms max 84.682 ms avg 6.439 ms med 0.432 ms std 10.473 E read rate 6.188 MB/s (data) 2.090 MB/s (readdir + open + 1st byte + data) 3 readers, 3 writers (30s) ---------------------------------------------------------------------- F write open cnt 25 min 0.043 ms max 46640.889 ms avg 1865.687 ms med 0.047 ms std 9139.700 G wr 1st byte cnt 25 min 0.006 ms max 0.019 ms avg 0.008 ms med 0.007 ms std 0.003 H write close cnt 25 min 0.017 ms max 0.043 ms avg 0.026 ms med 0.025 ms std 0.005 I mkdir cnt 6 min 0.032 ms max 119369.432 ms avg 19894.936 ms med 0.034 ms std 44486.347 J write rate 292.977 MB/s (data) 0.011 MB/s (open + 1st byte + data + close) A read dir cnt 20702 min 0.001 ms max 63.433 ms avg 0.737 ms med 0.004 ms std 3.986 B lstat file cnt 19336 min 0.007 ms max 36.816 ms avg 0.049 ms med 0.026 ms std 0.737 C open file cnt 15232 min 0.015 ms max 0.352 ms avg 0.020 ms med 0.018 ms std 0.010 D rd 1st byte cnt 15232 min 0.174 ms max 265.712 ms avg 6.005 ms med 0.381 ms std 10.749 E read rate 6.652 MB/s (data) 2.346 MB/s (readdir + open + 1st byte + data) Linux 2.6.31.2-test atime barrier=0 fs=ext4 disk=HDD journal=int data=journal scheduler=cfq ************************************************************************************** 1 readers (30s) ---------------------------------------------------------------------- A read dir cnt 27907 min 0.001 ms max 49.806 ms avg 0.054 ms med 0.004 ms std 0.613 B lstat file cnt 26077 min 0.006 ms max 18.676 ms avg 0.033 ms med 0.024 ms std 0.318 C open file cnt 20583 min 0.014 ms max 0.816 ms avg 0.021 ms med 0.018 ms std 0.011 D rd 1st byte cnt 20583 min 0.174 ms max 26.103 ms avg 0.607 ms med 0.284 ms std 1.394 E read rate 39.613 MB/s (data) 18.512 MB/s (readdir + open + 1st byte + data) 3 readers (30s) ---------------------------------------------------------------------- A read dir cnt 3640 min 0.001 ms max 68.271 ms avg 1.050 ms med 0.004 ms std 4.792 B lstat file cnt 3382 min 0.007 ms max 35.510 ms avg 0.052 ms med 0.026 ms std 0.865 C open file cnt 2613 min 0.015 ms max 0.132 ms avg 0.020 ms med 0.018 ms std 0.009 D rd 1st byte cnt 2613 min 0.179 ms max 67.530 ms avg 5.972 ms med 0.391 ms std 9.880 E read rate 6.329 MB/s (data) 2.160 MB/s (readdir + open + 1st byte + data) 3 readers, 3 writers (30s) ---------------------------------------------------------------------- F write open cnt 1027 min 0.039 ms max 144095.873 ms avg 140.376 ms med 0.044 ms std 4494.223 G wr 1st byte cnt 1027 min 0.006 ms max 0.137 ms avg 0.007 ms med 0.007 ms std 0.005 H write close cnt 1027 min 0.015 ms max 0.158 ms avg 0.022 ms med 0.021 ms std 0.011 I mkdir cnt 77 min 0.024 ms max 5330.687 ms avg 69.563 ms med 0.030 ms std 603.498 J write rate 3.913 MB/s (data) 0.247 MB/s (open + 1st byte + data + close) A read dir cnt 20771 min 0.001 ms max 105.553 ms avg 0.608 ms med 0.004 ms std 3.657 B lstat file cnt 19398 min 0.006 ms max 37.193 ms avg 0.047 ms med 0.026 ms std 0.719 C open file cnt 15279 min 0.015 ms max 0.269 ms avg 0.020 ms med 0.018 ms std 0.010 D rd 1st byte cnt 15279 min 0.176 ms max 1893.747 ms avg 5.805 ms med 0.367 ms std 18.598 E read rate 6.679 MB/s (data) 2.439 MB/s (readdir + open + 1st byte + data) Linux 2.6.31.2-test relatime barrier=1 fs=ext4 disk=HDD journal=int data=journal scheduler=cfq ************************************************************************************** 1 readers (30s) ---------------------------------------------------------------------- A read dir cnt 28174 min 0.001 ms max 49.693 ms avg 0.055 ms med 0.004 ms std 0.615 B lstat file cnt 26326 min 0.007 ms max 18.707 ms avg 0.030 ms med 0.024 ms std 0.259 C open file cnt 20785 min 0.014 ms max 0.186 ms avg 0.021 ms med 0.018 ms std 0.010 D rd 1st byte cnt 20785 min 0.173 ms max 26.065 ms avg 0.600 ms med 0.278 ms std 1.394 E read rate 39.957 MB/s (data) 18.672 MB/s (readdir + open + 1st byte + data) 3 readers (30s) ---------------------------------------------------------------------- A read dir cnt 3733 min 0.001 ms max 50.448 ms avg 1.098 ms med 0.004 ms std 4.728 B lstat file cnt 3465 min 0.007 ms max 31.605 ms avg 0.048 ms med 0.026 ms std 0.766 C open file cnt 2659 min 0.015 ms max 0.143 ms avg 0.020 ms med 0.017 ms std 0.010 D rd 1st byte cnt 2659 min 0.177 ms max 76.825 ms avg 5.610 ms med 0.369 ms std 9.581 E read rate 6.214 MB/s (data) 2.205 MB/s (readdir + open + 1st byte + data) 3 readers, 3 writers (30s) ---------------------------------------------------------------------- F write open cnt 36 min 0.043 ms max 0.071 ms avg 0.048 ms med 0.046 ms std 0.006 G wr 1st byte cnt 36 min 0.006 ms max 0.012 ms avg 0.007 ms med 0.007 ms std 0.001 H write close cnt 36 min 0.018 ms max 0.075 ms avg 0.024 ms med 0.022 ms std 0.010 I mkdir cnt 1 min 0.036 ms max 0.036 ms avg 0.036 ms med 0.036 ms std 0.000 J write rate 334.309 MB/s (data) 220.772 MB/s (open + 1st byte + data + close) A read dir cnt 20629 min 0.001 ms max 60.327 ms avg 0.719 ms med 0.004 ms std 3.913 B lstat file cnt 19264 min 0.006 ms max 40.192 ms avg 0.047 ms med 0.026 ms std 0.682 C open file cnt 15172 min 0.015 ms max 0.218 ms avg 0.020 ms med 0.017 ms std 0.010 D rd 1st byte cnt 15172 min 0.173 ms max 1490.397 ms avg 5.971 ms med 0.370 ms std 16.442 E read rate 6.729 MB/s (data) 2.372 MB/s (readdir + open + 1st byte + data) Linux 2.6.31.2-test atime barrier=1 fs=ext4 disk=HDD journal=int data=journal scheduler=cfq ************************************************************************************** 1 readers (30s) ---------------------------------------------------------------------- A read dir cnt 28101 min 0.001 ms max 49.701 ms avg 0.051 ms med 0.004 ms std 0.585 B lstat file cnt 26259 min 0.007 ms max 18.700 ms avg 0.032 ms med 0.024 ms std 0.301 C open file cnt 20735 min 0.014 ms max 0.258 ms avg 0.021 ms med 0.018 ms std 0.010 D rd 1st byte cnt 20735 min 0.173 ms max 21.416 ms avg 0.606 ms med 0.279 ms std 1.401 E read rate 39.923 MB/s (data) 18.644 MB/s (readdir + open + 1st byte + data) 3 readers (30s) ---------------------------------------------------------------------- A read dir cnt 3660 min 0.001 ms max 47.809 ms avg 1.143 ms med 0.004 ms std 4.947 B lstat file cnt 3400 min 0.007 ms max 36.473 ms avg 0.053 ms med 0.026 ms std 0.842 C open file cnt 2620 min 0.015 ms max 0.130 ms avg 0.020 ms med 0.018 ms std 0.010 D rd 1st byte cnt 2620 min 0.181 ms max 58.457 ms avg 5.990 ms med 0.405 ms std 9.754 E read rate 6.618 MB/s (data) 2.153 MB/s (readdir + open + 1st byte + data) 3 readers, 3 writers (30s) ---------------------------------------------------------------------- F write open cnt 36 min 0.043 ms max 0.065 ms avg 0.047 ms med 0.046 ms std 0.004 G wr 1st byte cnt 36 min 0.006 ms max 0.012 ms avg 0.007 ms med 0.007 ms std 0.001 H write close cnt 36 min 0.018 ms max 0.038 ms avg 0.022 ms med 0.022 ms std 0.005 I mkdir cnt 1 min 0.035 ms max 0.035 ms avg 0.035 ms med 0.035 ms std 0.000 J write rate 390.233 MB/s (data) 246.474 MB/s (open + 1st byte + data + close) A read dir cnt 9508 min 0.001 ms max 73.100 ms avg 0.783 ms med 0.004 ms std 4.158 B lstat file cnt 8861 min 0.006 ms max 35.236 ms avg 0.053 ms med 0.026 ms std 0.823 C open file cnt 6922 min 0.014 ms max 0.227 ms avg 0.020 ms med 0.017 ms std 0.010 D rd 1st byte cnt 6922 min 0.177 ms max 263.259 ms avg 5.842 ms med 0.369 ms std 10.907 E read rate 6.726 MB/s (data) 2.421 MB/s (readdir + open + 1st byte + data) Linux 2.6.31.2-test relatime barrier=0 fs=ext4 disk=HDD journal=int data=journal scheduler=deadline ************************************************************************************** 1 readers (30s) ---------------------------------------------------------------------- A read dir cnt 27932 min 0.001 ms max 49.761 ms avg 0.056 ms med 0.004 ms std 0.618 B lstat file cnt 26099 min 0.006 ms max 18.510 ms avg 0.032 ms med 0.024 ms std 0.314 C open file cnt 20598 min 0.014 ms max 0.234 ms avg 0.021 ms med 0.018 ms std 0.011 D rd 1st byte cnt 20598 min 0.170 ms max 34.677 ms avg 0.606 ms med 0.279 ms std 1.416 E read rate 39.791 MB/s (data) 18.514 MB/s (readdir + open + 1st byte + data) 3 readers (30s) ---------------------------------------------------------------------- A read dir cnt 3580 min 0.001 ms max 52.044 ms avg 1.058 ms med 0.004 ms std 4.774 B lstat file cnt 3325 min 0.007 ms max 23.240 ms avg 0.047 ms med 0.026 ms std 0.663 C open file cnt 2564 min 0.014 ms max 0.135 ms avg 0.020 ms med 0.018 ms std 0.009 D rd 1st byte cnt 2564 min 0.177 ms max 91.866 ms avg 6.082 ms med 0.531 ms std 9.782 E read rate 6.192 MB/s (data) 2.126 MB/s (readdir + open + 1st byte + data) 3 readers, 3 writers (30s) ---------------------------------------------------------------------- F write open cnt 57 min 0.042 ms max 0.059 ms avg 0.046 ms med 0.044 ms std 0.003 G wr 1st byte cnt 57 min 0.006 ms max 0.010 ms avg 0.007 ms med 0.007 ms std 0.001 H write close cnt 57 min 0.017 ms max 0.037 ms avg 0.022 ms med 0.021 ms std 0.004 I mkdir cnt 1 min 0.041 ms max 0.041 ms avg 0.041 ms med 0.041 ms std 0.000 J write rate 422.486 MB/s (data) 229.856 MB/s (open + 1st byte + data + close) A read dir cnt 8830 min 0.001 ms max 67.280 ms avg 0.837 ms med 0.004 ms std 4.248 B lstat file cnt 8227 min 0.006 ms max 29.439 ms avg 0.047 ms med 0.026 ms std 0.684 C open file cnt 6415 min 0.014 ms max 0.303 ms avg 0.020 ms med 0.017 ms std 0.011 D rd 1st byte cnt 6415 min 0.179 ms max 211.890 ms avg 5.840 ms med 0.377 ms std 10.777 E read rate 6.888 MB/s (data) 2.428 MB/s (readdir + open + 1st byte + data) Linux 2.6.31.2-test atime barrier=0 fs=ext4 disk=HDD journal=int data=journal scheduler=deadline ************************************************************************************** 1 readers (30s) ---------------------------------------------------------------------- A read dir cnt 27812 min 0.001 ms max 49.866 ms avg 0.054 ms med 0.004 ms std 0.606 B lstat file cnt 25986 min 0.006 ms max 18.521 ms avg 0.032 ms med 0.024 ms std 0.310 C open file cnt 20515 min 0.014 ms max 0.211 ms avg 0.021 ms med 0.018 ms std 0.010 D rd 1st byte cnt 20515 min 0.172 ms max 34.431 ms avg 0.608 ms med 0.285 ms std 1.410 E read rate 39.341 MB/s (data) 18.430 MB/s (readdir + open + 1st byte + data) 3 readers (30s) ---------------------------------------------------------------------- A read dir cnt 3449 min 0.001 ms max 59.004 ms avg 1.132 ms med 0.004 ms std 4.901 B lstat file cnt 3205 min 0.007 ms max 33.830 ms avg 0.053 ms med 0.026 ms std 0.840 C open file cnt 2477 min 0.014 ms max 0.217 ms avg 0.020 ms med 0.018 ms std 0.011 D rd 1st byte cnt 2477 min 0.184 ms max 72.972 ms avg 6.378 ms med 0.520 ms std 10.059 E read rate 6.273 MB/s (data) 2.082 MB/s (readdir + open + 1st byte + data) 3 readers, 3 writers (30s) ---------------------------------------------------------------------- F write open cnt 50 min 0.042 ms max 0.055 ms avg 0.046 ms med 0.045 ms std 0.003 G wr 1st byte cnt 50 min 0.006 ms max 0.008 ms avg 0.007 ms med 0.007 ms std 0.001 H write close cnt 50 min 0.017 ms max 0.034 ms avg 0.021 ms med 0.022 ms std 0.003 I mkdir cnt 1 min 0.047 ms max 0.047 ms avg 0.047 ms med 0.047 ms std 0.000 J write rate 379.501 MB/s (data) 186.674 MB/s (open + 1st byte + data + close) A read dir cnt 5101 min 0.001 ms max 67.053 ms avg 1.016 ms med 0.004 ms std 4.746 B lstat file cnt 4746 min 0.007 ms max 31.848 ms avg 0.050 ms med 0.026 ms std 0.723 C open file cnt 3679 min 0.014 ms max 0.179 ms avg 0.020 ms med 0.018 ms std 0.010 D rd 1st byte cnt 3679 min 0.176 ms max 212.100 ms avg 5.744 ms med 0.369 ms std 10.650 E read rate 7.077 MB/s (data) 2.394 MB/s (readdir + open + 1st byte + data) Linux 2.6.31.2-test relatime barrier=1 fs=ext4 disk=HDD journal=int data=journal scheduler=deadline ************************************************************************************** 1 readers (30s) ---------------------------------------------------------------------- A read dir cnt 27830 min 0.001 ms max 49.845 ms avg 0.057 ms med 0.004 ms std 0.621 B lstat file cnt 26004 min 0.006 ms max 18.631 ms avg 0.033 ms med 0.024 ms std 0.317 C open file cnt 20524 min 0.014 ms max 0.181 ms avg 0.020 ms med 0.018 ms std 0.010 D rd 1st byte cnt 20524 min 0.175 ms max 21.273 ms avg 0.610 ms med 0.284 ms std 1.404 E read rate 39.758 MB/s (data) 18.458 MB/s (readdir + open + 1st byte + data) 3 readers (30s) ---------------------------------------------------------------------- A read dir cnt 3672 min 0.001 ms max 77.116 ms avg 0.973 ms med 0.004 ms std 4.574 B lstat file cnt 3411 min 0.007 ms max 28.067 ms avg 0.047 ms med 0.026 ms std 0.715 C open file cnt 2630 min 0.015 ms max 0.157 ms avg 0.020 ms med 0.018 ms std 0.010 D rd 1st byte cnt 2630 min 0.183 ms max 63.469 ms avg 6.018 ms med 0.392 ms std 9.934 E read rate 6.326 MB/s (data) 2.163 MB/s (readdir + open + 1st byte + data) 3 readers, 3 writers (30s) ---------------------------------------------------------------------- F write open cnt 42 min 0.042 ms max 0.058 ms avg 0.046 ms med 0.046 ms std 0.003 G wr 1st byte cnt 42 min 0.006 ms max 0.007 ms avg 0.007 ms med 0.007 ms std 0.001 H write close cnt 42 min 0.017 ms max 0.058 ms avg 0.024 ms med 0.023 ms std 0.006 I mkdir cnt 6 min 0.029 ms max 0.039 ms avg 0.034 ms med 0.035 ms std 0.003 J write rate 352.267 MB/s (data) 219.370 MB/s (open + 1st byte + data + close) A read dir cnt 7345 min 0.001 ms max 79.375 ms avg 0.803 ms med 0.004 ms std 4.198 B lstat file cnt 6837 min 0.007 ms max 37.889 ms avg 0.052 ms med 0.026 ms std 0.824 C open file cnt 5313 min 0.014 ms max 0.190 ms avg 0.021 ms med 0.018 ms std 0.011 D rd 1st byte cnt 5313 min 0.176 ms max 216.657 ms avg 5.946 ms med 0.370 ms std 11.928 E read rate 6.952 MB/s (data) 2.446 MB/s (readdir + open + 1st byte + data) Linux 2.6.31.2-test atime barrier=1 fs=ext4 disk=HDD journal=int data=journal scheduler=deadline ************************************************************************************** 1 readers (30s) ---------------------------------------------------------------------- A read dir cnt 27977 min 0.001 ms max 49.818 ms avg 0.055 ms med 0.004 ms std 0.613 B lstat file cnt 26143 min 0.007 ms max 18.782 ms avg 0.033 ms med 0.024 ms std 0.308 C open file cnt 20639 min 0.014 ms max 0.182 ms avg 0.021 ms med 0.018 ms std 0.010 D rd 1st byte cnt 20639 min 0.174 ms max 21.451 ms avg 0.601 ms med 0.278 ms std 1.388 E read rate 39.539 MB/s (data) 18.539 MB/s (readdir + open + 1st byte + data) 3 readers (30s) ---------------------------------------------------------------------- A read dir cnt 3649 min 0.001 ms max 55.716 ms avg 1.037 ms med 0.004 ms std 4.636 B lstat file cnt 3390 min 0.007 ms max 28.073 ms avg 0.046 ms med 0.026 ms std 0.665 C open file cnt 2614 min 0.015 ms max 0.093 ms avg 0.021 ms med 0.017 ms std 0.011 D rd 1st byte cnt 2614 min 0.186 ms max 73.950 ms avg 5.813 ms med 0.384 ms std 9.632 E read rate 6.116 MB/s (data) 2.179 MB/s (readdir + open + 1st byte + data) 3 readers, 3 writers (30s) ---------------------------------------------------------------------- F write open cnt 508 min 0.040 ms max 1192.424 ms avg 2.429 ms med 0.046 ms std 52.852 G wr 1st byte cnt 508 min 0.006 ms max 0.408 ms avg 0.009 ms med 0.007 ms std 0.022 H write close cnt 508 min 0.016 ms max 55.092 ms avg 0.134 ms med 0.022 ms std 2.441 I mkdir cnt 31 min 0.026 ms max 98874.035 ms avg 3933.351 ms med 0.033 ms std 17804.073 J write rate 322.656 MB/s (data) 11.466 MB/s (open + 1st byte + data + close) A read dir cnt 15619 min 0.001 ms max 64.807 ms avg 0.788 ms med 0.004 ms std 4.040 B lstat file cnt 14573 min 0.007 ms max 33.631 ms avg 0.047 ms med 0.026 ms std 0.687 C open file cnt 11435 min 0.014 ms max 0.242 ms avg 0.020 ms med 0.017 ms std 0.010 D rd 1st byte cnt 11435 min 0.173 ms max 207.994 ms avg 5.935 ms med 0.373 ms std 10.524 E read rate 6.519 MB/s (data) 2.349 MB/s (readdir + open + 1st byte + data) Linux 2.6.31.2-test relatime barrier=0 fs=ext4 disk=HDD journal=int data=ordered scheduler=cfq ************************************************************************************** 1 readers (30s) ---------------------------------------------------------------------- A read dir cnt 27911 min 0.001 ms max 49.803 ms avg 0.053 ms med 0.004 ms std 0.598 B lstat file cnt 26080 min 0.006 ms max 18.587 ms avg 0.030 ms med 0.024 ms std 0.260 C open file cnt 20585 min 0.014 ms max 0.243 ms avg 0.021 ms med 0.018 ms std 0.010 D rd 1st byte cnt 20585 min 0.170 ms max 26.036 ms avg 0.609 ms med 0.285 ms std 1.407 E read rate 39.464 MB/s (data) 18.470 MB/s (readdir + open + 1st byte + data) 3 readers (30s) ---------------------------------------------------------------------- A read dir cnt 4017 min 0.001 ms max 44.297 ms avg 0.811 ms med 0.004 ms std 4.078 B lstat file cnt 3731 min 0.007 ms max 28.032 ms avg 0.044 ms med 0.026 ms std 0.616 C open file cnt 2870 min 0.014 ms max 0.160 ms avg 0.021 ms med 0.018 ms std 0.011 D rd 1st byte cnt 2870 min 0.175 ms max 94.720 ms avg 5.375 ms med 0.357 ms std 9.432 E read rate 6.602 MB/s (data) 2.408 MB/s (readdir + open + 1st byte + data) 3 readers, 3 writers (30s) ---------------------------------------------------------------------- F write open cnt 93 min 0.041 ms max 16664.497 ms avg 179.242 ms med 0.046 ms std 1718.707 G wr 1st byte cnt 93 min 0.006 ms max 0.139 ms avg 0.009 ms med 0.007 ms std 0.016 H write close cnt 93 min 0.011 ms max 0.904 ms avg 0.029 ms med 0.016 ms std 0.094 I mkdir cnt 2 min 0.043 ms max 0.046 ms avg 0.044 ms med 0.046 ms std 0.002 J write rate 518.859 MB/s (data) 0.148 MB/s (open + 1st byte + data + close) A read dir cnt 4215 min 0.001 ms max 58.735 ms avg 0.524 ms med 0.004 ms std 3.398 B lstat file cnt 3923 min 0.007 ms max 28.015 ms avg 0.052 ms med 0.026 ms std 0.763 C open file cnt 3048 min 0.015 ms max 0.362 ms avg 0.020 ms med 0.018 ms std 0.012 D rd 1st byte cnt 3048 min 0.176 ms max 127.708 ms avg 5.711 ms med 0.362 ms std 10.085 E read rate 6.434 MB/s (data) 2.439 MB/s (readdir + open + 1st byte + data) Linux 2.6.31.2-test atime barrier=0 fs=ext4 disk=HDD journal=int data=ordered scheduler=cfq ************************************************************************************** 1 readers (30s) ---------------------------------------------------------------------- A read dir cnt 27906 min 0.001 ms max 49.834 ms avg 0.058 ms med 0.004 ms std 0.630 B lstat file cnt 26075 min 0.006 ms max 18.511 ms avg 0.032 ms med 0.024 ms std 0.309 C open file cnt 20580 min 0.014 ms max 0.226 ms avg 0.021 ms med 0.018 ms std 0.010 D rd 1st byte cnt 20580 min 0.174 ms max 26.098 ms avg 0.604 ms med 0.279 ms std 1.391 E read rate 39.635 MB/s (data) 18.480 MB/s (readdir + open + 1st byte + data) 3 readers (30s) ---------------------------------------------------------------------- A read dir cnt 3738 min 0.001 ms max 60.771 ms avg 0.972 ms med 0.004 ms std 4.416 B lstat file cnt 3469 min 0.007 ms max 27.160 ms avg 0.045 ms med 0.025 ms std 0.628 C open file cnt 2660 min 0.015 ms max 0.219 ms avg 0.021 ms med 0.018 ms std 0.010 D rd 1st byte cnt 2660 min 0.181 ms max 58.998 ms avg 5.783 ms med 0.394 ms std 9.402 E read rate 6.237 MB/s (data) 2.212 MB/s (readdir + open + 1st byte + data) 3 readers, 3 writers (30s) ---------------------------------------------------------------------- F write open cnt 5506 min 0.039 ms max 33.257 ms avg 0.063 ms med 0.044 ms std 0.574 G wr 1st byte cnt 5506 min 0.006 ms max 0.306 ms avg 0.007 ms med 0.006 ms std 0.007 H write close cnt 5506 min 0.011 ms max 0.294 ms avg 0.016 ms med 0.015 ms std 0.012 I mkdir cnt 505 min 0.024 ms max 33373.215 ms avg 111.688 ms med 0.031 ms std 1798.943 J write rate 686.423 MB/s (data) 266.960 MB/s (open + 1st byte + data + close) A read dir cnt 7747 min 0.001 ms max 65.666 ms avg 0.797 ms med 0.004 ms std 4.245 B lstat file cnt 7211 min 0.006 ms max 40.136 ms avg 0.059 ms med 0.025 ms std 0.959 C open file cnt 5605 min 0.014 ms max 0.204 ms avg 0.021 ms med 0.018 ms std 0.010 D rd 1st byte cnt 5605 min 0.173 ms max 215.237 ms avg 5.698 ms med 0.365 ms std 10.798 E read rate 6.962 MB/s (data) 2.519 MB/s (readdir + open + 1st byte + data) Linux 2.6.31.2-test relatime barrier=1 fs=ext4 disk=HDD journal=int data=ordered scheduler=cfq ************************************************************************************** 1 readers (30s) ---------------------------------------------------------------------- A read dir cnt 28281 min 0.001 ms max 49.772 ms avg 0.052 ms med 0.004 ms std 0.595 B lstat file cnt 26422 min 0.006 ms max 18.530 ms avg 0.030 ms med 0.025 ms std 0.265 C open file cnt 20843 min 0.014 ms max 0.243 ms avg 0.021 ms med 0.018 ms std 0.010 D rd 1st byte cnt 20843 min 0.174 ms max 21.633 ms avg 0.597 ms med 0.277 ms std 1.379 E read rate 39.805 MB/s (data) 18.749 MB/s (readdir + open + 1st byte + data) 3 readers (30s) ---------------------------------------------------------------------- A read dir cnt 4022 min 0.001 ms max 51.777 ms avg 0.887 ms med 0.004 ms std 4.304 B lstat file cnt 3735 min 0.007 ms max 28.177 ms avg 0.042 ms med 0.026 ms std 0.598 C open file cnt 2873 min 0.015 ms max 0.094 ms avg 0.020 ms med 0.018 ms std 0.009 D rd 1st byte cnt 2873 min 0.188 ms max 61.493 ms avg 5.442 ms med 0.370 ms std 9.192 E read rate 6.779 MB/s (data) 2.361 MB/s (readdir + open + 1st byte + data) 3 readers, 3 writers (30s) ---------------------------------------------------------------------- F write open cnt 139 min 0.041 ms max 8835.322 ms avg 63.714 ms med 0.046 ms std 746.690 G wr 1st byte cnt 139 min 0.006 ms max 0.015 ms avg 0.007 ms med 0.007 ms std 0.001 H write close cnt 139 min 0.012 ms max 0.076 ms avg 0.016 ms med 0.016 ms std 0.007 I mkdir cnt 13 min 0.029 ms max 17111.323 ms avg 1543.915 ms med 0.035 ms std 4559.103 J write rate 665.952 MB/s (data) 0.708 MB/s (open + 1st byte + data + close) A read dir cnt 4249 min 0.001 ms max 112.545 ms avg 0.909 ms med 0.004 ms std 5.027 B lstat file cnt 3957 min 0.007 ms max 31.743 ms avg 0.052 ms med 0.026 ms std 0.771 C open file cnt 3079 min 0.015 ms max 0.129 ms avg 0.020 ms med 0.018 ms std 0.009 D rd 1st byte cnt 3079 min 0.179 ms max 137.797 ms avg 5.674 ms med 0.371 ms std 10.945 E read rate 6.506 MB/s (data) 2.347 MB/s (readdir + open + 1st byte + data) Linux 2.6.31.2-test atime barrier=1 fs=ext4 disk=HDD journal=int data=ordered scheduler=cfq ************************************************************************************** 1 readers (30s) ---------------------------------------------------------------------- A read dir cnt 28043 min 0.001 ms max 49.858 ms avg 0.054 ms med 0.004 ms std 0.611 B lstat file cnt 26204 min 0.006 ms max 18.589 ms avg 0.031 ms med 0.024 ms std 0.271 C open file cnt 20684 min 0.014 ms max 0.188 ms avg 0.021 ms med 0.018 ms std 0.010 D rd 1st byte cnt 20684 min 0.174 ms max 23.234 ms avg 0.604 ms med 0.281 ms std 1.390 E read rate 39.800 MB/s (data) 18.605 MB/s (readdir + open + 1st byte + data) 3 readers (30s) ---------------------------------------------------------------------- A read dir cnt 3786 min 0.001 ms max 52.119 ms avg 1.115 ms med 0.004 ms std 4.829 B lstat file cnt 3515 min 0.007 ms max 36.380 ms avg 0.049 ms med 0.026 ms std 0.808 C open file cnt 2699 min 0.015 ms max 0.148 ms avg 0.021 ms med 0.018 ms std 0.011 D rd 1st byte cnt 2699 min 0.175 ms max 63.324 ms avg 5.533 ms med 0.367 ms std 9.272 E read rate 6.412 MB/s (data) 2.243 MB/s (readdir + open + 1st byte + data) 3 readers, 3 writers (30s) ---------------------------------------------------------------------- F write open cnt 277 min 0.041 ms max 91.657 ms avg 0.378 ms med 0.046 ms std 5.494 G wr 1st byte cnt 277 min 0.006 ms max 0.022 ms avg 0.007 ms med 0.007 ms std 0.001 H write close cnt 277 min 0.011 ms max 0.690 ms avg 0.018 ms med 0.015 ms std 0.041 I mkdir cnt 18 min 0.030 ms max 11762.438 ms avg 1250.692 ms med 0.037 ms std 3541.414 J write rate 698.402 MB/s (data) 89.492 MB/s (open + 1st byte + data + close) A read dir cnt 3949 min 0.001 ms max 74.334 ms avg 0.673 ms med 0.004 ms std 3.771 B lstat file cnt 3678 min 0.007 ms max 34.716 ms avg 0.051 ms med 0.026 ms std 0.756 C open file cnt 2864 min 0.014 ms max 0.185 ms avg 0.020 ms med 0.018 ms std 0.010 D rd 1st byte cnt 2864 min 0.173 ms max 129.778 ms avg 6.224 ms med 0.372 ms std 10.949 E read rate 6.956 MB/s (data) 2.370 MB/s (readdir + open + 1st byte + data) Linux 2.6.31.2-test relatime barrier=0 fs=ext4 disk=HDD journal=int data=ordered scheduler=deadline ************************************************************************************** 1 readers (30s) ---------------------------------------------------------------------- A read dir cnt 26935 min 0.001 ms max 105.367 ms avg 0.058 ms med 0.004 ms std 0.881 B lstat file cnt 25173 min 0.007 ms max 18.197 ms avg 0.030 ms med 0.024 ms std 0.254 C open file cnt 19883 min 0.014 ms max 0.279 ms avg 0.021 ms med 0.018 ms std 0.010 D rd 1st byte cnt 19883 min 0.175 ms max 89.297 ms avg 0.635 ms med 0.284 ms std 1.897 E read rate 38.215 MB/s (data) 17.735 MB/s (readdir + open + 1st byte + data) 3 readers (30s) ---------------------------------------------------------------------- A read dir cnt 3450 min 0.001 ms max 102.098 ms avg 1.106 ms med 0.004 ms std 5.306 B lstat file cnt 3204 min 0.007 ms max 28.096 ms avg 0.049 ms med 0.026 ms std 0.728 C open file cnt 2472 min 0.015 ms max 0.140 ms avg 0.020 ms med 0.018 ms std 0.009 D rd 1st byte cnt 2472 min 0.185 ms max 117.655 ms avg 6.439 ms med 0.530 ms std 10.946 E read rate 6.151 MB/s (data) 2.038 MB/s (readdir + open + 1st byte + data) 3 readers, 3 writers (30s) ---------------------------------------------------------------------- F write open cnt 356 min 0.040 ms max 9583.730 ms avg 27.088 ms med 0.046 ms std 507.217 G wr 1st byte cnt 356 min 0.006 ms max 0.015 ms avg 0.007 ms med 0.007 ms std 0.001 H write close cnt 356 min 0.011 ms max 0.608 ms avg 0.018 ms med 0.016 ms std 0.031 I mkdir cnt 27 min 0.030 ms max 12038.399 ms avg 727.948 ms med 0.036 ms std 2642.988 J write rate 666.253 MB/s (data) 1.398 MB/s (open + 1st byte + data + close) A read dir cnt 4264 min 0.001 ms max 68.754 ms avg 0.530 ms med 0.004 ms std 3.498 B lstat file cnt 3980 min 0.006 ms max 34.748 ms avg 0.049 ms med 0.026 ms std 0.783 C open file cnt 3120 min 0.015 ms max 0.235 ms avg 0.020 ms med 0.018 ms std 0.011 D rd 1st byte cnt 3120 min 0.183 ms max 120.039 ms avg 6.384 ms med 0.377 ms std 11.479 E read rate 6.706 MB/s (data) 2.299 MB/s (readdir + open + 1st byte + data) Linux 2.6.31.2-test atime barrier=0 fs=ext4 disk=HDD journal=int data=ordered scheduler=deadline ************************************************************************************** 1 readers (30s) ---------------------------------------------------------------------- A read dir cnt 28163 min 0.001 ms max 58.205 ms avg 0.053 ms med 0.004 ms std 0.628 B lstat file cnt 26318 min 0.007 ms max 18.538 ms avg 0.031 ms med 0.025 ms std 0.277 C open file cnt 20785 min 0.014 ms max 0.184 ms avg 0.021 ms med 0.018 ms std 0.010 D rd 1st byte cnt 20785 min 0.174 ms max 21.430 ms avg 0.602 ms med 0.278 ms std 1.388 E read rate 39.980 MB/s (data) 18.675 MB/s (readdir + open + 1st byte + data) 3 readers (30s) ---------------------------------------------------------------------- A read dir cnt 3628 min 0.001 ms max 66.974 ms avg 1.198 ms med 0.004 ms std 5.276 B lstat file cnt 3371 min 0.007 ms max 36.388 ms avg 0.048 ms med 0.026 ms std 0.745 C open file cnt 2599 min 0.015 ms max 0.097 ms avg 0.020 ms med 0.018 ms std 0.008 D rd 1st byte cnt 2599 min 0.178 ms max 76.745 ms avg 5.844 ms med 0.385 ms std 9.780 E read rate 6.431 MB/s (data) 2.169 MB/s (readdir + open + 1st byte + data) 3 readers, 3 writers (30s) ---------------------------------------------------------------------- F write open cnt 559 min 0.040 ms max 23.304 ms avg 0.109 ms med 0.045 ms std 1.089 G wr 1st byte cnt 559 min 0.006 ms max 0.015 ms avg 0.007 ms med 0.007 ms std 0.001 H write close cnt 559 min 0.011 ms max 0.465 ms avg 0.016 ms med 0.015 ms std 0.020 I mkdir cnt 41 min 0.027 ms max 15165.460 ms avg 803.065 ms med 0.033 ms std 2971.290 J write rate 700.626 MB/s (data) 222.723 MB/s (open + 1st byte + data + close) A read dir cnt 4312 min 0.001 ms max 51.622 ms avg 0.542 ms med 0.004 ms std 3.304 B lstat file cnt 4016 min 0.007 ms max 36.301 ms avg 0.059 ms med 0.026 ms std 0.881 C open file cnt 3126 min 0.015 ms max 0.195 ms avg 0.020 ms med 0.017 ms std 0.010 D rd 1st byte cnt 3126 min 0.184 ms max 205.818 ms avg 6.188 ms med 0.367 ms std 11.631 E read rate 6.602 MB/s (data) 2.337 MB/s (readdir + open + 1st byte + data) Linux 2.6.31.2-test relatime barrier=1 fs=ext4 disk=HDD journal=int data=ordered scheduler=deadline ************************************************************************************** 1 readers (30s) ---------------------------------------------------------------------- A read dir cnt 27884 min 0.001 ms max 58.073 ms avg 0.058 ms med 0.004 ms std 0.657 B lstat file cnt 26055 min 0.006 ms max 21.560 ms avg 0.032 ms med 0.024 ms std 0.311 C open file cnt 20566 min 0.014 ms max 0.173 ms avg 0.021 ms med 0.018 ms std 0.010 D rd 1st byte cnt 20566 min 0.172 ms max 23.506 ms avg 0.608 ms med 0.279 ms std 1.404 E read rate 39.793 MB/s (data) 18.447 MB/s (readdir + open + 1st byte + data) 3 readers (30s) ---------------------------------------------------------------------- A read dir cnt 3685 min 0.001 ms max 54.885 ms avg 0.965 ms med 0.004 ms std 4.384 B lstat file cnt 3423 min 0.006 ms max 27.150 ms avg 0.043 ms med 0.026 ms std 0.583 C open file cnt 2639 min 0.015 ms max 0.170 ms avg 0.021 ms med 0.018 ms std 0.010 D rd 1st byte cnt 2639 min 0.178 ms max 85.325 ms avg 6.058 ms med 0.374 ms std 10.412 E read rate 6.440 MB/s (data) 2.174 MB/s (readdir + open + 1st byte + data) 3 readers, 3 writers (30s) ---------------------------------------------------------------------- F write open cnt 265 min 0.040 ms max 3.133 ms avg 0.059 ms med 0.046 ms std 0.189 G wr 1st byte cnt 265 min 0.006 ms max 0.014 ms avg 0.007 ms med 0.007 ms std 0.001 H write close cnt 265 min 0.011 ms max 0.027 ms avg 0.015 ms med 0.015 ms std 0.003 I mkdir cnt 25 min 0.028 ms max 10797.843 ms avg 654.228 ms med 0.035 ms std 2339.003 J write rate 663.203 MB/s (data) 278.798 MB/s (open + 1st byte + data + close) A read dir cnt 4245 min 0.001 ms max 66.090 ms avg 0.643 ms med 0.004 ms std 3.899 B lstat file cnt 3958 min 0.007 ms max 34.687 ms avg 0.053 ms med 0.026 ms std 0.818 C open file cnt 3099 min 0.015 ms max 0.255 ms avg 0.021 ms med 0.018 ms std 0.011 D rd 1st byte cnt 3099 min 0.179 ms max 195.381 ms avg 5.457 ms med 0.359 ms std 10.785 E read rate 6.544 MB/s (data) 2.481 MB/s (readdir + open + 1st byte + data) Linux 2.6.31.2-test atime barrier=1 fs=ext4 disk=HDD journal=int data=ordered scheduler=deadline ************************************************************************************** 1 readers (30s) ---------------------------------------------------------------------- A read dir cnt 28074 min 0.001 ms max 49.869 ms avg 0.054 ms med 0.004 ms std 0.611 B lstat file cnt 26234 min 0.006 ms max 21.601 ms avg 0.031 ms med 0.024 ms std 0.298 C open file cnt 20710 min 0.014 ms max 0.187 ms avg 0.021 ms med 0.018 ms std 0.010 D rd 1st byte cnt 20710 min 0.174 ms max 26.047 ms avg 0.605 ms med 0.279 ms std 1.405 E read rate 39.918 MB/s (data) 18.589 MB/s (readdir + open + 1st byte + data) 3 readers (30s) ---------------------------------------------------------------------- A read dir cnt 3667 min 0.001 ms max 54.032 ms avg 1.065 ms med 0.004 ms std 4.897 B lstat file cnt 3406 min 0.007 ms max 28.097 ms avg 0.046 ms med 0.026 ms std 0.638 C open file cnt 2623 min 0.015 ms max 0.145 ms avg 0.021 ms med 0.018 ms std 0.010 D rd 1st byte cnt 2623 min 0.180 ms max 74.775 ms avg 5.867 ms med 0.378 ms std 9.724 E read rate 6.323 MB/s (data) 2.187 MB/s (readdir + open + 1st byte + data) 3 readers, 3 writers (30s) ---------------------------------------------------------------------- F write open cnt 252 min 0.040 ms max 93.368 ms avg 0.418 ms med 0.047 ms std 5.867 G wr 1st byte cnt 252 min 0.006 ms max 0.016 ms avg 0.007 ms med 0.007 ms std 0.001 H write close cnt 252 min 0.011 ms max 0.359 ms avg 0.018 ms med 0.016 ms std 0.029 I mkdir cnt 17 min 0.027 ms max 23940.492 ms avg 2188.748 ms med 0.036 ms std 6267.274 J write rate 644.881 MB/s (data) 77.848 MB/s (open + 1st byte + data + close) A read dir cnt 5225 min 0.001 ms max 79.108 ms avg 0.635 ms med 0.004 ms std 3.850 B lstat file cnt 4861 min 0.007 ms max 26.304 ms avg 0.046 ms med 0.026 ms std 0.643 C open file cnt 3765 min 0.014 ms max 0.093 ms avg 0.020 ms med 0.018 ms std 0.009 D rd 1st byte cnt 3765 min 0.177 ms max 204.665 ms avg 5.643 ms med 0.356 ms std 11.689 E read rate 6.448 MB/s (data) 2.454 MB/s (readdir + open + 1st byte + data) Linux 2.6.31.2-test relatime barrier=0 fs=ext4 disk=HDD journal=int data=writeback scheduler=cfq ************************************************************************************** 1 readers (30s) ---------------------------------------------------------------------- A read dir cnt 27442 min 0.001 ms max 76.777 ms avg 0.054 ms med 0.004 ms std 0.744 B lstat file cnt 25641 min 0.006 ms max 19.142 ms avg 0.033 ms med 0.024 ms std 0.340 C open file cnt 20231 min 0.014 ms max 0.238 ms avg 0.021 ms med 0.018 ms std 0.010 D rd 1st byte cnt 20231 min 0.176 ms max 92.028 ms avg 0.615 ms med 0.281 ms std 1.718 E read rate 38.516 MB/s (data) 18.143 MB/s (readdir + open + 1st byte + data) 3 readers (30s) ---------------------------------------------------------------------- A read dir cnt 3538 min 0.001 ms max 105.489 ms avg 1.185 ms med 0.004 ms std 5.530 B lstat file cnt 3286 min 0.006 ms max 35.518 ms avg 0.053 ms med 0.026 ms std 0.920 C open file cnt 2532 min 0.015 ms max 0.153 ms avg 0.020 ms med 0.018 ms std 0.010 D rd 1st byte cnt 2532 min 0.181 ms max 107.687 ms avg 6.158 ms med 0.402 ms std 10.994 E read rate 6.310 MB/s (data) 2.079 MB/s (readdir + open + 1st byte + data) 3 readers, 3 writers (30s) ---------------------------------------------------------------------- F write open cnt 5905 min 0.040 ms max 58397.194 ms avg 10.336 ms med 0.045 ms std 760.381 G wr 1st byte cnt 5905 min 0.006 ms max 0.318 ms avg 0.007 ms med 0.007 ms std 0.008 H write close cnt 5905 min 0.011 ms max 0.329 ms avg 0.016 ms med 0.015 ms std 0.014 I mkdir cnt 540 min 0.024 ms max 35.269 ms avg 0.139 ms med 0.031 ms std 1.736 J write rate 50.798 MB/s (data) 3.328 MB/s (open + 1st byte + data + close) A read dir cnt 8219 min 0.001 ms max 113.523 ms avg 0.829 ms med 0.004 ms std 4.350 B lstat file cnt 7657 min 0.007 ms max 31.846 ms avg 0.055 ms med 0.026 ms std 0.858 C open file cnt 5970 min 0.015 ms max 0.173 ms avg 0.020 ms med 0.018 ms std 0.010 D rd 1st byte cnt 5970 min 0.173 ms max 234.857 ms avg 5.945 ms med 0.368 ms std 11.616 E read rate 6.815 MB/s (data) 2.406 MB/s (readdir + open + 1st byte + data) Linux 2.6.31.2-test atime barrier=0 fs=ext4 disk=HDD journal=int data=writeback scheduler=cfq ************************************************************************************** 1 readers (30s) ---------------------------------------------------------------------- A read dir cnt 27116 min 0.001 ms max 65.419 ms avg 0.056 ms med 0.004 ms std 0.725 B lstat file cnt 25341 min 0.006 ms max 18.609 ms avg 0.032 ms med 0.024 ms std 0.303 C open file cnt 20009 min 0.014 ms max 0.307 ms avg 0.021 ms med 0.018 ms std 0.011 D rd 1st byte cnt 20009 min 0.175 ms max 92.808 ms avg 0.641 ms med 0.279 ms std 2.200 E read rate 39.206 MB/s (data) 17.911 MB/s (readdir + open + 1st byte + data) 3 readers (30s) ---------------------------------------------------------------------- A read dir cnt 3597 min 0.001 ms max 118.567 ms avg 0.981 ms med 0.004 ms std 5.374 B lstat file cnt 3342 min 0.007 ms max 22.999 ms avg 0.044 ms med 0.026 ms std 0.585 C open file cnt 2574 min 0.014 ms max 0.191 ms avg 0.021 ms med 0.018 ms std 0.012 D rd 1st byte cnt 2574 min 0.180 ms max 123.871 ms avg 6.011 ms med 0.386 ms std 10.810 E read rate 5.953 MB/s (data) 2.128 MB/s (readdir + open + 1st byte + data) 3 readers, 3 writers (30s) ---------------------------------------------------------------------- F write open cnt 1196 min 0.040 ms max 122.712 ms avg 0.176 ms med 0.045 ms std 3.594 G wr 1st byte cnt 1196 min 0.006 ms max 0.065 ms avg 0.007 ms med 0.007 ms std 0.002 H write close cnt 1196 min 0.011 ms max 0.217 ms avg 0.017 ms med 0.016 ms std 0.012 I mkdir cnt 94 min 0.026 ms max 0.050 ms avg 0.033 ms med 0.032 ms std 0.006 J write rate 0.540 MB/s (data) 0.538 MB/s (open + 1st byte + data + close) A read dir cnt 11572 min 0.001 ms max 160.077 ms avg 0.824 ms med 0.004 ms std 4.792 B lstat file cnt 10796 min 0.007 ms max 31.821 ms avg 0.052 ms med 0.026 ms std 0.764 C open file cnt 8464 min 0.015 ms max 0.188 ms avg 0.020 ms med 0.018 ms std 0.010 D rd 1st byte cnt 8464 min 0.175 ms max 220.729 ms avg 6.254 ms med 0.391 ms std 11.781 E read rate 6.192 MB/s (data) 2.231 MB/s (readdir + open + 1st byte + data) Linux 2.6.31.2-test relatime barrier=1 fs=ext4 disk=HDD journal=int data=writeback scheduler=cfq ************************************************************************************** 1 readers (30s) ---------------------------------------------------------------------- A read dir cnt 27045 min 0.001 ms max 57.727 ms avg 0.057 ms med 0.004 ms std 0.701 B lstat file cnt 25277 min 0.007 ms max 18.603 ms avg 0.033 ms med 0.024 ms std 0.329 C open file cnt 19971 min 0.014 ms max 0.246 ms avg 0.021 ms med 0.018 ms std 0.010 D rd 1st byte cnt 19971 min 0.174 ms max 82.114 ms avg 0.625 ms med 0.280 ms std 1.816 E read rate 38.335 MB/s (data) 17.898 MB/s (readdir + open + 1st byte + data) 3 readers (30s) ---------------------------------------------------------------------- A read dir cnt 3512 min 0.001 ms max 85.244 ms avg 1.058 ms med 0.004 ms std 5.099 B lstat file cnt 3266 min 0.007 ms max 40.608 ms avg 0.053 ms med 0.026 ms std 0.916 C open file cnt 2533 min 0.014 ms max 0.105 ms avg 0.020 ms med 0.018 ms std 0.009 D rd 1st byte cnt 2533 min 0.178 ms max 142.996 ms avg 6.297 ms med 0.398 ms std 11.163 E read rate 6.379 MB/s (data) 2.119 MB/s (readdir + open + 1st byte + data) 3 readers, 3 writers (30s) ---------------------------------------------------------------------- F write open cnt 3690 min 0.040 ms max 24.774 ms avg 0.054 ms med 0.045 ms std 0.408 G wr 1st byte cnt 3690 min 0.006 ms max 0.182 ms avg 0.007 ms med 0.007 ms std 0.003 H write close cnt 3690 min 0.011 ms max 0.285 ms avg 0.015 ms med 0.015 ms std 0.007 I mkdir cnt 357 min 0.024 ms max 63.915 ms avg 0.212 ms med 0.031 ms std 3.376 J write rate 3.816 MB/s (data) 3.788 MB/s (open + 1st byte + data + close) A read dir cnt 5051 min 0.001 ms max 58.053 ms avg 0.840 ms med 0.004 ms std 4.161 B lstat file cnt 4709 min 0.006 ms max 34.742 ms avg 0.046 ms med 0.026 ms std 0.712 C open file cnt 3680 min 0.015 ms max 0.184 ms avg 0.020 ms med 0.018 ms std 0.009 D rd 1st byte cnt 3680 min 0.180 ms max 241.937 ms avg 5.893 ms med 0.369 ms std 11.012 E read rate 6.598 MB/s (data) 2.299 MB/s (readdir + open + 1st byte + data) Linux 2.6.31.2-test atime barrier=1 fs=ext4 disk=HDD journal=int data=writeback scheduler=cfq ************************************************************************************** 1 readers (30s) ---------------------------------------------------------------------- A read dir cnt 27584 min 0.001 ms max 54.900 ms avg 0.043 ms med 0.004 ms std 0.528 B lstat file cnt 25770 min 0.006 ms max 21.645 ms avg 0.031 ms med 0.024 ms std 0.295 C open file cnt 20326 min 0.014 ms max 0.218 ms avg 0.021 ms med 0.018 ms std 0.011 D rd 1st byte cnt 20326 min 0.172 ms max 86.070 ms avg 0.629 ms med 0.278 ms std 2.040 E read rate 38.794 MB/s (data) 18.242 MB/s (readdir + open + 1st byte + data) 3 readers (30s) ---------------------------------------------------------------------- A read dir cnt 3793 min 0.001 ms max 107.185 ms avg 1.067 ms med 0.004 ms std 5.026 B lstat file cnt 3520 min 0.006 ms max 25.455 ms avg 0.044 ms med 0.026 ms std 0.617 C open file cnt 2704 min 0.015 ms max 0.299 ms avg 0.021 ms med 0.018 ms std 0.014 D rd 1st byte cnt 2704 min 0.176 ms max 104.686 ms avg 5.577 ms med 0.371 ms std 10.522 E read rate 6.379 MB/s (data) 2.237 MB/s (readdir + open + 1st byte + data) 3 readers, 3 writers (30s) ---------------------------------------------------------------------- F write open cnt 6722 min 0.040 ms max 329.949 ms avg 0.138 ms med 0.046 ms std 4.230 G wr 1st byte cnt 6722 min 0.006 ms max 0.373 ms avg 0.007 ms med 0.007 ms std 0.006 H write close cnt 6722 min 0.011 ms max 17.957 ms avg 0.019 ms med 0.016 ms std 0.219 I mkdir cnt 638 min 0.024 ms max 149.256 ms avg 0.436 ms med 0.032 ms std 6.627 J write rate 4.589 MB/s (data) 4.497 MB/s (open + 1st byte + data + close) A read dir cnt 7067 min 0.001 ms max 195.320 ms avg 0.837 ms med 0.004 ms std 4.783 B lstat file cnt 6579 min 0.007 ms max 28.082 ms avg 0.051 ms med 0.026 ms std 0.718 C open file cnt 5117 min 0.015 ms max 0.218 ms avg 0.020 ms med 0.018 ms std 0.010 D rd 1st byte cnt 5117 min 0.176 ms max 247.375 ms avg 6.240 ms med 0.380 ms std 12.667 E read rate 6.452 MB/s (data) 2.279 MB/s (readdir + open + 1st byte + data) Linux 2.6.31.2-test relatime barrier=0 fs=ext4 disk=HDD journal=int data=writeback scheduler=deadline ************************************************************************************** 1 readers (30s) ---------------------------------------------------------------------- A read dir cnt 27403 min 0.001 ms max 86.549 ms avg 0.055 ms med 0.004 ms std 0.786 B lstat file cnt 25605 min 0.006 ms max 95.769 ms avg 0.034 ms med 0.024 ms std 0.663 C open file cnt 20204 min 0.014 ms max 0.329 ms avg 0.021 ms med 0.018 ms std 0.011 D rd 1st byte cnt 20204 min 0.170 ms max 103.183 ms avg 0.618 ms med 0.279 ms std 1.979 E read rate 38.682 MB/s (data) 18.133 MB/s (readdir + open + 1st byte + data) 3 readers (30s) ---------------------------------------------------------------------- A read dir cnt 3646 min 0.001 ms max 50.266 ms avg 0.890 ms med 0.004 ms std 4.243 B lstat file cnt 3387 min 0.007 ms max 28.098 ms avg 0.047 ms med 0.026 ms std 0.695 C open file cnt 2614 min 0.014 ms max 0.103 ms avg 0.020 ms med 0.018 ms std 0.009 D rd 1st byte cnt 2614 min 0.182 ms max 123.333 ms avg 6.206 ms med 0.398 ms std 10.348 E read rate 6.302 MB/s (data) 2.152 MB/s (readdir + open + 1st byte + data) 3 readers, 3 writers (30s) ---------------------------------------------------------------------- F write open cnt 44 min 0.041 ms max 0.153 ms avg 0.047 ms med 0.043 ms std 0.017 G wr 1st byte cnt 44 min 0.006 ms max 0.063 ms avg 0.008 ms med 0.007 ms std 0.008 H write close cnt 44 min 0.011 ms max 0.028 ms avg 0.016 ms med 0.016 ms std 0.003 I mkdir cnt 4 min 0.031 ms max 0.069 ms avg 0.041 ms med 0.033 ms std 0.016 J write rate 0.054 MB/s (data) 0.054 MB/s (open + 1st byte + data + close) A read dir cnt 10716 min 0.001 ms max 71.329 ms avg 0.945 ms med 0.004 ms std 4.593 B lstat file cnt 9997 min 0.006 ms max 40.132 ms avg 0.048 ms med 0.026 ms std 0.713 C open file cnt 7840 min 0.014 ms max 0.232 ms avg 0.020 ms med 0.018 ms std 0.010 D rd 1st byte cnt 7840 min 0.166 ms max 297.824 ms avg 6.341 ms med 0.390 ms std 11.620 E read rate 6.429 MB/s (data) 2.231 MB/s (readdir + open + 1st byte + data) Linux 2.6.31.2-test atime barrier=0 fs=ext4 disk=HDD journal=int data=writeback scheduler=deadline ************************************************************************************** 1 readers (30s) ---------------------------------------------------------------------- A read dir cnt 28170 min 0.001 ms max 49.788 ms avg 0.051 ms med 0.004 ms std 0.587 B lstat file cnt 26322 min 0.006 ms max 18.672 ms avg 0.033 ms med 0.024 ms std 0.328 C open file cnt 20778 min 0.014 ms max 0.237 ms avg 0.021 ms med 0.018 ms std 0.010 D rd 1st byte cnt 20778 min 0.172 ms max 21.638 ms avg 0.602 ms med 0.280 ms std 1.392 E read rate 40.024 MB/s (data) 18.721 MB/s (readdir + open + 1st byte + data) 3 readers (30s) ---------------------------------------------------------------------- A read dir cnt 3758 min 0.001 ms max 46.195 ms avg 0.969 ms med 0.004 ms std 4.445 B lstat file cnt 3488 min 0.007 ms max 27.999 ms avg 0.047 ms med 0.026 ms std 0.699 C open file cnt 2678 min 0.015 ms max 0.106 ms avg 0.020 ms med 0.018 ms std 0.010 D rd 1st byte cnt 2678 min 0.181 ms max 76.073 ms avg 5.880 ms med 0.378 ms std 9.962 E read rate 6.504 MB/s (data) 2.226 MB/s (readdir + open + 1st byte + data) 3 readers, 3 writers (30s) ---------------------------------------------------------------------- F write open cnt 7242 min 0.039 ms max 548.505 ms avg 0.152 ms med 0.044 ms std 6.500 G wr 1st byte cnt 7242 min 0.006 ms max 0.147 ms avg 0.007 ms med 0.007 ms std 0.004 H write close cnt 7242 min 0.011 ms max 54113.464 ms avg 7.488 ms med 0.015 ms std 635.837 I mkdir cnt 674 min 0.024 ms max 53.685 ms avg 0.165 ms med 0.031 ms std 2.474 J write rate 675.673 MB/s (data) 4.644 MB/s (open + 1st byte + data + close) A read dir cnt 8699 min 0.001 ms max 86.429 ms avg 0.888 ms med 0.004 ms std 4.514 B lstat file cnt 8103 min 0.006 ms max 34.623 ms avg 0.047 ms med 0.026 ms std 0.678 C open file cnt 6313 min 0.014 ms max 0.261 ms avg 0.020 ms med 0.018 ms std 0.010 D rd 1st byte cnt 6313 min 0.177 ms max 220.724 ms avg 5.728 ms med 0.369 ms std 10.621 E read rate 6.627 MB/s (data) 2.411 MB/s (readdir + open + 1st byte + data) Linux 2.6.31.2-test relatime barrier=1 fs=ext4 disk=HDD journal=int data=writeback scheduler=deadline ************************************************************************************** 1 readers (30s) ---------------------------------------------------------------------- A read dir cnt 27013 min 0.001 ms max 71.355 ms avg 0.056 ms med 0.004 ms std 0.743 B lstat file cnt 25245 min 0.007 ms max 18.690 ms avg 0.030 ms med 0.024 ms std 0.253 C open file cnt 19942 min 0.014 ms max 0.660 ms avg 0.021 ms med 0.018 ms std 0.011 D rd 1st byte cnt 19942 min 0.176 ms max 106.007 ms avg 0.632 ms med 0.279 ms std 2.153 E read rate 38.044 MB/s (data) 17.750 MB/s (readdir + open + 1st byte + data) 3 readers (30s) ---------------------------------------------------------------------- A read dir cnt 3455 min 0.001 ms max 121.435 ms avg 1.256 ms med 0.004 ms std 6.385 B lstat file cnt 3211 min 0.007 ms max 36.434 ms avg 0.057 ms med 0.026 ms std 0.995 C open file cnt 2481 min 0.015 ms max 0.102 ms avg 0.021 ms med 0.018 ms std 0.010 D rd 1st byte cnt 2481 min 0.179 ms max 121.479 ms avg 5.990 ms med 0.391 ms std 10.470 E read rate 5.997 MB/s (data) 2.092 MB/s (readdir + open + 1st byte + data) 3 readers, 3 writers (30s) ---------------------------------------------------------------------- F write open cnt 6745 min 0.040 ms max 1699.536 ms avg 0.393 ms med 0.045 ms std 21.370 G wr 1st byte cnt 6745 min 0.006 ms max 0.154 ms avg 0.007 ms med 0.007 ms std 0.004 H write close cnt 6745 min 0.011 ms max 0.298 ms avg 0.016 ms med 0.016 ms std 0.010 I mkdir cnt 624 min 0.026 ms max 14172.114 ms avg 22.775 ms med 0.033 ms std 566.882 J write rate 4.253 MB/s (data) 4.061 MB/s (open + 1st byte + data + close) A read dir cnt 9873 min 0.001 ms max 297.671 ms avg 0.804 ms med 0.004 ms std 5.099 B lstat file cnt 9206 min 0.006 ms max 28.064 ms avg 0.049 ms med 0.026 ms std 0.694 C open file cnt 7207 min 0.015 ms max 0.153 ms avg 0.021 ms med 0.018 ms std 0.010 D rd 1st byte cnt 7207 min 0.172 ms max 256.562 ms avg 5.744 ms med 0.364 ms std 11.831 E read rate 6.931 MB/s (data) 2.452 MB/s (readdir + open + 1st byte + data) Linux 2.6.31.2-test atime barrier=1 fs=ext4 disk=HDD journal=int data=writeback scheduler=deadline ************************************************************************************** 1 readers (30s) ---------------------------------------------------------------------- A read dir cnt 27194 min 0.001 ms max 58.132 ms avg 0.053 ms med 0.004 ms std 0.624 B lstat file cnt 25412 min 0.007 ms max 18.196 ms avg 0.030 ms med 0.024 ms std 0.270 C open file cnt 20059 min 0.014 ms max 0.234 ms avg 0.021 ms med 0.018 ms std 0.010 D rd 1st byte cnt 20059 min 0.175 ms max 105.911 ms avg 0.628 ms med 0.280 ms std 2.062 E read rate 38.279 MB/s (data) 17.935 MB/s (readdir + open + 1st byte + data) 3 readers (30s) ---------------------------------------------------------------------- A read dir cnt 3586 min 0.001 ms max 105.063 ms avg 1.143 ms med 0.004 ms std 5.244 B lstat file cnt 3331 min 0.007 ms max 36.432 ms avg 0.050 ms med 0.026 ms std 0.798 C open file cnt 2567 min 0.015 ms max 0.164 ms avg 0.020 ms med 0.018 ms std 0.010 D rd 1st byte cnt 2567 min 0.180 ms max 130.980 ms avg 6.105 ms med 0.388 ms std 10.665 E read rate 6.379 MB/s (data) 2.100 MB/s (readdir + open + 1st byte + data) 3 readers, 3 writers (30s) ---------------------------------------------------------------------- F write open cnt 6702 min 0.039 ms max 45090.418 ms avg 6.951 ms med 0.045 ms std 550.819 G wr 1st byte cnt 6702 min 0.006 ms max 0.196 ms avg 0.007 ms med 0.007 ms std 0.009 H write close cnt 6702 min 0.011 ms max 0.408 ms avg 0.017 ms med 0.015 ms std 0.016 I mkdir cnt 617 min 0.024 ms max 55.039 ms avg 0.130 ms med 0.032 ms std 2.214 J write rate 25.089 MB/s (data) 4.461 MB/s (open + 1st byte + data + close) A read dir cnt 7164 min 0.001 ms max 69.758 ms avg 0.899 ms med 0.004 ms std 4.484 B lstat file cnt 6672 min 0.007 ms max 44.770 ms avg 0.056 ms med 0.026 ms std 0.899 C open file cnt 5198 min 0.015 ms max 0.188 ms avg 0.020 ms med 0.018 ms std 0.011 D rd 1st byte cnt 5198 min 0.181 ms max 268.943 ms avg 6.091 ms med 0.376 ms std 11.735 E read rate 6.594 MB/s (data) 2.311 MB/s (readdir + open + 1st byte + data)