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: Thu Aug 6 03:50:45 2026 Auto Mode Machine = Linux oleg117-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-oleg117-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 1121 4414 587635 424198 64 8 4710 5687 640954 426897 64 16 7157 26889 855419 752329 64 32 6275 54286 1049372 809014 64 64 1721 38508 1143223 1599680 128 4 4272 4157 493989 546819 128 8 4882 17398 907174 1093856 128 16 11387 33394 1057236 663782 128 32 15023 40725 836500 969421 128 64 11649 33791 1185654 1185654 128 128 13322 56241 985435 2066432 256 4 3324 7805 610842 97561 256 8 7123 14681 281319 741633 256 16 5769 7064 1076103 561343 256 32 18855 43389 203483 409542 256 64 17512 24589 1219045 53962 256 128 22620 46929 1032636 1361224 256 256 7480 69453 1368162 95803 512 4 6767 6786 257528 415872 512 8 9755 13783 259238 137194 512 16 14845 19225 1047141 219943 512 32 12791 47508 636139 516618 512 64 14511 48506 791318 593423 512 128 24760 72204 1909204 1322500 512 256 12607 67008 696600 1580419 512 512 35902 63904 990625 2132967 1024 4 4187 10226 255686 160855 1024 8 4309 13600 636027 784640 1024 16 10759 35210 902151 805688 1024 32 32386 35632 562624 598117 1024 64 10895 20028 1039489 224259 1024 128 16004 26492 755118 724790 1024 256 32074 44574 351504 1656494 1024 512 34790 68063 158885 574669 2048 4 3007 4411 224756 188100 2048 8 8676 7469 245245 296769 2048 16 9735 14537 1024586 908141 2048 32 8937 12846 1335955 1042745 2048 64 25357 32450 498174 691854 2048 128 36087 46984 842827 578532 2048 256 30438 38781 1551704 541070 2048 512 25271 43287 1633127 1037456 4096 4 3411 3875 328544 420963 4096 8 7139 12003 281356 407069 4096 16 9566 19196 414364 379642 4096 32 10777 15875 244623 268751 4096 64 11887 26015 383019 390950 4096 128 30478 39408 748682 409231 4096 256 18421 31469 739593 748943 4096 512 44095 40660 1572412 581898 8192 4 4548 4891 185225 147210 8192 8 7628 10092 432204 181939 8192 16 10810 15526 551318 385234 8192 32 16708 22634 730253 448263 8192 64 32788 36503 858954 754681 8192 128 29598 46168 475285 336001 8192 256 35595 52667 1048230 648250 8192 512 33414 39365 677081 720046 16384 4 4246 5160 200523 240343 16384 8 9925 9717 656567 488679 16384 16 14096 21213 363168 307536 16384 32 14416 18967 810535 751732 16384 64 25341 28047 636375 765243 16384 128 33062 27783 270394 489190 16384 256 30622 55437 638877 548803 16384 512 48140 73753 1270470 572448 32768 4 5748 4978 240933 166362 32768 8