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 May 25 04:50:06 2026 Auto Mode Machine = Linux oleg316-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-oleg316-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 1334 6551 592827 621657 64 8 7033 19601 262193 227911 64 16 6259 27959 955947 763021 64 32 7420 54885 1163036 926260 64 64 8273 76831 161241 1562436 128 4 3124 16293 385736 695603 128 8 3030 10239 794416 237468 128 16 5922 29829 992724 870405 128 32 8788 17108 1196221 992724 128 64 4094 48820 870405 864797 128 128 9000 75831 1440082 1561553 256 4 5080 3904 686620 220897 256 8 11558 13359 764334 575175 256 16 14704 31500 520272 340351 256 32 6032 23818 1184092 387799 256 64 6969 65846 392620 592636 256 128 5964 105831 739590 1471270 256 256 5335 85449 1642294 1415041 512 4 9554 6414 219650 525082 512 8 4699 4597 492790 613250 512 16 10630 44544 930933 434642 512 32 12563 21855 1329871 902757 512 64 12388 23350 664895 1122687 512 128 49487 35027 703215 448813 512 256 27431 75006 266245 1402845 512 512 19369 72274 664073 1122687 1024 4 6710 4234 278102 543473 1024 8 6828 6618 578851 790707 1024 16 6909 18424 642400 760870 1024 32 10026 37745 339985 946485 1024 64 45718 24594 1321607 602396 1024 128 37231 44778 1273410 765208 1024 256 18473 40659 620587 1363565 1024 512 33624 37079 805084 580181 2048 4 2959 4761 627469 293323 2048 8 4166 12865 816548 413239 2048 16 10395 8292 484381 309037 2048 32 22182 18600 599738 954776 2048 64 19097 15843 1245675 116935 2048 128 31955 43564 887682 661690 2048 256 25467 24764 1513696 284483 2048 512 18286 53012 676116 269972 4096 4 4608 6021 403711 271169 4096 8 11974 8085 198613 191053 4096 16 11545 13739 369238 548775 4096 32 18854 18558 414574 551878 4096 64 27819 29178 442713 260195 4096 128 32097 38676 603759 490940 4096 256 33017 41929 946820 448387 4096 512 35929 40704 488025 628704 8192 4 5597 5523 289367 231603 8192 8 10707 15619 304400 277112 8192 16 15233 20091 540759 756475 8192 32 22775 32678 910413 718660 8192 64 27146 38599 976744 554790 8192 128 33006 46114 518576 1050666 8192 256 47240 50376 759569 632091 8192 512 35911 59347 1180389 985343 16384 4 6248 8284 378820 302566 16384 8 13180 13364 260075 256882 16384 16 25407 28803 904051 718884 16384 32 37537 38276 794841 636392 16384 64 30507 36601 585789 419369 16384 128 32375 55274 749257 454377 16384 256 35263 45855 1070366 649020 16384 512 33545 49323 1045293 925280 32768 4 6273 6036 267517 257354 32768 8 7179 8137 238689 233174