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: Sat Sep 12 21:58:01 2026 Auto Mode Machine = Linux oleg435-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-oleg435-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 4285 12756 621657 538156 64 8 4361 17927 695778 298990 64 16 6032 17107 1049372 460591 64 32 5007 47757 1049372 874936 64 64 7616 73810 1947927 1638743 128 4 7399 16664 278922 486822 128 8 7182 26517 824932 800337 128 16 9007 49381 877518 800337 128 32 8966 52099 1217930 1048974 128 64 9597 64289 1303699 1526043 128 128 13304 107550 1487977 1772988 256 4 9300 12582 439013 462061 256 8 11166 22625 635047 1071806 256 16 14333 53535 1274008 921029 256 32 23453 44305 1354356 977189 256 64 18977 61984 1206714 1639786 256 128 21902 95957 1153561 624339 256 256 14768 107419 1715775 1752173 512 4 8829 15615 595397 213875 512 8 9609 19655 590486 722133 512 16 21011 51189 842214 678122 512 32 28955 55773 1293037 1797349 512 64 33938 44771 1614885 1279935 512 128 32016 67474 2009236 724325 512 256 22338 55459 1629590 1213400 512 512 46027 136540 1394645 2460437 1024 4 14350 17451 785213 556861 1024 8 22766 26686 632840 710639 1024 16 33601 47892 1116792 925877 1024 32 40075 75701 1506051 966071 1024 64 44576 93379 800582 1200782 1024 128 43007 127138 1627617 1582636 1024 256 49566 96015 1575091 1400926 1024 512 50265 120439 909410 1541732 2048 4 14676 16088 378631 397980 2048 8 19812 30456 968774 571907 2048 16 30286 51284 987938 1156456 2048 32 45640 68141 811457 706710 2048 64 52596 89494 1326465 1168252 2048 128 56005 102414 967029 1770096 2048 256 51320 79214 807263 1497076 2048 512 57366 92677 735325 1556202 4096 4 14363 16008 568252 540931 4096 8 23966 29591 942664 476334 4096 16 36866 47699 766622 675580 4096 32 53773 66773 1254480 597689 4096 64 59156 73677 1538614 1310759 4096 128 60100 95524 1249190 1357147 4096 256 73234 87288 1209696 1238206 4096 512 66185 91273 847685 776042 8192 4 14439 16462 613306 533960 8192 8 23725 24830 1008865 626250 8192 16 38995 45092 701193 903685 8192 32 38712 64364 1137144 1069603 8192 64 51996 76162 848916 1274007 8192 128 63571 98555 1516195 1037876 8192 256 70303 97627 1654630 1128220 8192 512 75294 116295 1473098 1361493 16384 4