Iozone: Performance Test of File I/O Version $Revision: 3.483 $ Compiled for 64 bit mode. Build: linux-AMD64 Contributors:William Norcott, Don Capps, Isom Crawford, Kirby Collins Al Slater, Scott Rhine, Mike Wisner, Ken Goss Steve Landherr, Brad Smith, Mark Kelly, Dr. Alain CYR, Randy Dunlap, Mark Montague, Dan Million, Gavin Brebner, Jean-Marc Zucconi, Jeff Blomberg, Benny Halevy, Dave Boone, Erik Habbinga, Kris Strecker, Walter Wong, Joshua Root, Fabrice Bacchella, Zhenghua Xue, Qin Li, Darren Sawyer, Vangel Bojaxhi, Ben England, Vikentsi Lapa, Alexey Skidanov, Sudhir Kumar. Run began: Mon Mar 16 14:32:08 2026 Auto Mode Machine = Linux oleg125-client.virtnet 4.18.0rh8.10-debug #2 SMP Mon Jul 14 01 Excel chart generation enabled Excel chart generation enabled Verify Mode. Pattern dbdbdbdb Performance measurements are invalid in this mode. Using maximum file size of 102400 kilobytes. Using Maximum Record Size 512 kB Command line used: iozone -a -M -R -V 0xab -g 100M -q 512k -i0 -i1 -f /mnt/lustre/d4.lustre-rsync-test/d0.iozone-oleg125-client.virtnet/iozone-file Output is in kBytes/sec Time Resolution = 0.000001 seconds. Processor cache size set to 1024 kBytes. Processor cache line size set to 32 bytes. File stride size set to 17 * record size. random random bkwd record stride kB reclen write rewrite read reread read write read rewrite read fwrite frewrite fread freread 64 4 2746 8527 88539 125742 64 8 7953 22947 278227 58231 64 16 8404 50832 418250 277078 64 32 9811 43479 444572 538156 64 64 5638 35955 188269 809014 128 4 6437 9510 111388 70208 128 8 9415 17985 232330 80917 128 16 12493 35418 228961 181571 128 32 15946 64841 104820 358677 128 64 17755 95311 727658 864797 128 128 5461 32786 883293 1316487 256 4 6209 10193 36352 99302 256 8 9236 10460 103765 51645 256 16 7698 32221 101749 48603 256 32 8307 10469 334623 367241 256 64 26589 45030 575175 530031 256 128 20615 120810 351722 1103757 256 256 15152 130406 1398455 2413957 512 4 5969 7405 84087 127493 512 8 11098 11733 53816 59259 512 16 10017 27064 128064 151169 512 32 14234 25328 123313 295926 512 64 19308 26108 117106 774759 512 128 21069 46394 1012101 793951 512 256 11500 79416 520248 1094088 512 512 39077 57035 1910902 596058 1024 4 10570 8953 62098 54640 1024 8 8963 14213 82874 44794 1024 16 26553 24879 77680 116140 1024 32 17032 21091 129289 410263 1024 64 23017 80687 772920 532226 1024 128 26357 45082 754720 777537 1024 256 42277 110967 801328 1184882 1024 512 37597 53917 690086 982873 2048 4 6961 10785 80030 32094 2048 8 17932 21379 152892 170666 2048 16 26134 23779 169117 247678 2048 32 41159 54492 342763 388459 2048 64 46793 47789 893499 674577 2048 128 45725 64051 868564 785846 2048 256 33934 74889 1348963 376606 2048 512 39070 83377 1336787 1119092 4096 4 10320 11464 82570 72568 4096 8 10610 14169 178225 197645 4096 16 19383 27291 280223 180709 4096 32 20804 30186 347469 516131 4096 64 37955 54099 195374 251609 4096 128 29039 54320 679051 442485 4096 256 33530 58928 1060825 552926 4096 512 36696 96567 559244 519864 8192 4 9142 8217 88591 92190 8192 8 10435 16098 2807 100521 8192 16 20233 19045 195363 121931 8192 32 17018 29578 231924 344971 8192 64 33646 50758 457271 295357 8192 128 40781 54555 838066 516355 8192 256 56882 48015 1045710 645292 8192 512 59767 88517 1252368 1093708 16384 4 9816 11708 103739 106236 16384 8 18421 19091 201450 203677 16384 16 31205 32122 236322 285669 16384 32 36088 39582 568080 470198 16384 64 45659 52235 864452 400694 16384 128 60858 102152 1223336 678792 16384 256 74853 99599 1455957 1105244 16384 512 55207 78875 1135881 943769 32768 4 10553 9951 104874 92587 32768 8 14762 16343 112481 129818 32768 16 16856 20447 207068 192049 32768 32 28350 30335 493508 329737 32768 64 39808 44695 471896 567147 32768 128 44982 53149 586516 544980 32768 256 49500 64535 657873 375276 32768 512 55963 86633 1177138 755425 65536 4