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: Fri Oct 2 18:24:27 2026 Auto Mode Machine = Linux oleg428-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-oleg428-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 1499 8604 582535 488236 64 8 3736 6036 695778 296023 64 16 2469 22923 270108 695778 64 32 3260 31949 1017549 809014 64 64 2759 28569 1163036 1492919 128 4 2456 4845 637004 540217 128 8 2421 9886 785122 205791 128 16 6211 23121 375222 883293 128 32 3368 25558 1085013 962469 128 64 7251 28155 1162547 1123617 128 128 4565 33594 1424795 1878447 256 4 7078 7599 393195 328581 256 8 9152 11652 251237 349320 256 16 7367 17353 951219 889002 256 32 4560 11563 1185399 248332 256 64 9658 42271 605332 792543 256 128 13049 43821 666586 378637 256 256 10193 54328 408918 876662 512 4 4903 7217 372387 163944 512 8 8460 10881 362823 645703 512 16 10453 10698 875521 467168 512 32 5602 14858 254990 274691 512 64 20963 23837 709254 598884 512 128 13480 31767 801357 1089647 512 256 24408 33218 659788 1276891 512 512 14389 64541 1475116 1895721 1024 4 2848 4351 149949 184011 1024 8 7483 6898 328944 314216 1024 16 11704 27168 1091532 947320 1024 32 14132 44802 1200447 571381 1024 64 31407 68244 727861 1172909 1024 128 31715 73945 1458489 287388 1024 256 27517 58463 1528019 1437980 1024 512 20578 75304 551428 1101046 2048 4 9483 4991 296646 298201 2048 8 9536 21533 924165 499391 2048 16 24187 28102 1189444 535705 2048 32 28222 25196 500001 603445 2048 64 37905 46999 1494992 679486 2048 128 23507 40801 815928 908621 2048 256 22855 42977 1532875 596904 2048 512 28090 70874 828120 705260 4096 4 7282 5527 277095 245620 4096 8 6200 11049 208521 502206 4096 16 19154 25597 280337 611148 4096 32 24557 21286 586988 465090 4096 64 27840 30959 502073 495714 4096 128 23337 26829 577556 545985 4096 256 23645 63976 1420316 1039075 4096 512 29410 49149 1114866 383480 8192 4 6079 5554 204147 341830 8192 8 2118 10268 487878 418557 8192 16 11583 16372 435463 312503 8192 32 13770 19199 608074 648507 8192 64 18659 21144 381754 400389 8192 128 19026 31340 662461 315111 8192 256 17797 23984 509736 601380 8192 512 22313 37464 710913 479906 16384 4 5110 4430 390607 321785 16384 8 7993 9460 488332 305826 16384 16 9523 14360 299475 346788 16384 32 20637 24304 444720 657698 16384 64 24891 28951 779487 287665 16384 128 28294 29742 700770 630033 16384 256 28026 40936 891895 418932 16384 512 25200 45510 1129626 703813 32768 4 6186 7596 321038 197492 32768 8 11860 11155 372757 364571 32768 16 15970 14898 502909 384754 32768 32