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 Jun 1 13:43:15 2026 Auto Mode Machine = Linux oleg429-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-oleg429-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 1538 7835 615952 450541 64 8 1821 7864 789967 771797 64 16 2252 17025 1033216 503814 64 32 2200 26734 1105556 877797 64 64 3210 10526 1279447 1279447 128 4 3049 9957 554157 231429 128 8 6675 16009 680612 303350 128 16 6362 38859 962469 200638 128 32 5230 39531 1000121 339403 128 64 6363 37591 1102844 1359835 128 128 5253 92217 1000121 1827299 256 4 5608 8693 449112 499925 256 8 6981 18443 508929 748875 256 16 6335 10172 1062263 350231 256 32 5569 36555 1153561 930608 256 64 10406 24948 656399 1206714 256 128 11713 30654 1415041 320825 256 256 12521 41550 1066483 65979 512 4 4468 9646 587738 589999 512 8 8796 24353 268207 442980 512 16 9535 22917 941546 746481 512 32 11543 24480 259395 847867 512 64 9229 11903 255233 1044594 512 128 11373 68256 1551867 1339827 512 256 8369 22324 942786 448719 512 512 11508 33824 1365383 1817120 1024 4 4974 3651 65699 141412 1024 8 6036 8107 423157 319594 1024 16 11768 18425 725647 483025 1024 32 16864 35005 558019 411087 1024 64 10917 28490 303943 557440 1024 128 20543 39090 641249 256067 1024 256 15478 40125 382087 819211 1024 512 21860 32288 684042 1047091 2048 4 5138 5455 317665 199030 2048 8 7444 9853 876720 233334 2048 16 13192 13886 996650 321554 2048 32 28107 37705 1154436 1016463 2048 64 13726 46959 176857 497079 2048 128 24153 31053 1447382 698266 2048 256 29762 54267 650762 1269610 2048 512 34444 68604 512012 529464 4096 4 5038 5979 277641 123944 4096 8 7068 13131 533954 386274 4096 16 13028 16907 678247 345944 4096 32 28455 46363 667962 537748 4096 64 22787 25222 429488 643228 4096 128 15748 49092 495642 669602 4096 256 26392 65561 391512 788906 4096 512 1547 34156 472171 741764 8192 4 5400 4668 531877 311010 8192 8 9745 10149 390523 447381 8192 16 16695 19077 504497 478136 8192 32 20170 37406 1032388 414008 8192 64 27207 30633 648825 623919 8192 128 30412 35836 777901 725596 8192 256 30853 33130 913463 952907 8192 512 26544 34256 414448 327314 16384 4 4499 6705 306856 316825 16384 8 15353 11572 507073 746319 16384 16 16363 14191 340610 276117 16384 32 14831 14074 523585 471343 16384 64 20513 15350 338045 213516 16384 128 11777 31235 185310 272766 16384 256 45320 20017 619877 527002 16384 512 28710 27737 731947 636245 32768 4 5875 5701 240243 223422 32768 8 10368 14253 609285 580622 32768 16 19028 21151 414407 348944 32768 32