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 2 12:53:46 2026 Auto Mode Machine = Linux oleg447-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-oleg447-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 2909 11935 561808 500060 64 8 3065 8869 818885 278227 64 16 5055 21843 1002351 780776 64 32 3837 51525 1083249 789967 64 64 4702 66944 1183548 1879725 128 4 5177 7043 604036 564055 128 8 6295 11349 600657 901083 128 16 5080 24714 472262 688467 128 32 7265 15283 1057236 529038 128 64 4481 28250 39616 722760 128 128 13647 104331 722760 1755594 256 4 4320 12173 839644 725106 256 8 8171 10585 633548 575484 256 16 10439 20240 823544 740100 256 32 10543 40277 478536 770920 256 64 11026 22855 1011241 1040643 256 128 11368 71789 1487577 1376935 256 256 11109 56373 2533571 3236056 512 4 6796 7199 367795 352867 512 8 9190 12042 1105920 532767 512 16 21327 30251 1011625 320385 512 32 13095 70349 278250 514514 512 64 17732 33943 1036527 531055 512 128 20314 32694 1391032 1096322 512 256 22131 147798 2178404 1394645 512 512 15784 51359 1096322 1807941 1024 4 10625 9755 565439 308240 1024 8 9027 7220 389043 456095 1024 16 23681 29337 553845 626288 1024 32 23363 38354 642785 372639 1024 64 30055 49430 831905 1000037 1024 128 31965 77804 1144163 368230 1024 256 21583 64365 1326096 622115 1024 512 21393 86825 532490 1012771 2048 4 8261 12020 503577 421471 2048 8 20058 24382 724900 403457 2048 16 23511 27014 594138 318407 2048 32 22968 45321 398442 616658 2048 64 31448 71610 1065510 795304 2048 128 33280 84414 331493 1276970 2048 256 42900 75826 861249 683106 2048 512 43935 65171 1024464 871826 4096 4 9023 12139 613067 499446 4096 8 13090 16011 579094 453249 4096 16 18886 30335 494871 963763 4096 32 40124 38836 1104899 724833 4096 64 24946 73440 936650 373209 4096 128 38051 63279 550093 916758 4096 256 50767 49765 629972 940960 4096 512 43024 74499 901602 733530 8192 4 9185 10108 376992 247513 8192 8 15345 15593 739956 456148 8192 16 21536 25523 592370 477193 8192 32 24269 37114 670541 719669 8192 64 35145 40393 686099 580383 8192 128 39420 64141 1227448 872145 8192 256 37374 63559 1004177 706571 8192 512 53267 54662 484132 1029017 16384 4 3459 9488 334045 344555 16384 8 13429 16365 505476 441475 16384 16 22043 21982 960321 663777 16384 32 44691 52421 1231602 1482979 16384 64 43961 51229 1247159 1057372 16384 128 52931 56248 841070 811281 16384 256 54676 79791 952679 1067291 16384 512 45556 63111 513188 544697 32768 4 8375 9528 613126 577878 32768 8 17989 16054 631564 700437 32768 16 25688 29253 573126 691524 32768 32 27574 40441 880506 995409 32768 64 43473 53864 886698 1075524 32768 128 48571 59398 965467 1164916 32768 256 51915 55730 796499 921149 32768 512 54078 60471 693663 760243 65536 4 8096 8583 524136 247922 65536 8