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 Sep 11 08:53:26 2026 Auto Mode Machine = Linux oleg640-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-oleg640-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 1828 3373 603489 198722 64 8 1352 7911 799377 645579 64 16 3759 39211 863676 889431 64 32 3134 59259 1336792 969761 64 64 7886 67721 789967 1304314 128 4 4741 12488 609522 515822 128 8 5360 9722 702889 688467 128 16 7661 13713 902598 542400 128 32 8544 51141 1123617 1007629 128 64 15167 66495 1349580 870405 128 128 5673 85220 1467639 2098744 256 4 3997 4826 562815 518013 256 8 6730 18353 770920 736041 256 16 8306 46870 1012194 820398 256 32 14327 70235 1112909 445942 256 64 18524 60520 1319408 805021 256 128 9798 52136 1455317 1430119 256 256 10154 39894 182708 2015259 512 4 9447 10202 337771 244259 512 8 5776 6150 829847 485328 512 16 9660 24957 500484 878027 512 32 20018 29109 1333173 907717 512 64 13740 73049 765371 1210664 512 128 15698 88982 1484293 607353 512 256 10522 119292 1580419 1438555 512 512 34903 101263 1759070 1924603 1024 4 9077 5310 181208 551711 1024 8 8768 9198 906913 468228 1024 16 14110 20837 504174 192661 1024 32 26019 42782 987619 911146 1024 64 27287 35137 737231 1103308 1024 128 43730 82941 925877 1232484 1024 256 46038 82828 1275301 941918 1024 512 50014 64261 184874 568884 2048 4 5166 6306 342367 417944 2048 8 11300 13393 212760 343105 2048 16 18725 24045 344896 604635 2048 32 14577 19052 325860 225476 2048 64 14056 34749 218852 169551 2048 128 28407 57366 1451540 1245675 2048 256 34420 80633 1310279 773951 2048 512 44229 51875 780491 530281 4096 4 8291 7540 236488 236231 4096 8 12328 12893 425731 185750 4096 16 21409 28991 316220 580012 4096 32 23649 60794 882203 300911 4096 64 27907 44902 841210 330994 4096 128 21613 47368 749793 784655 4096 256 32145 1443 339329 438723 4096 512 23451 61120 770957 343853 8192 4 7715 5890 140017 250337 8192 8 10430 11181 243253 322010 8192 16 16273 21390 604086 310726 8192 32 18256 26757 550206 818209 8192 64 23274 28013 578322 436808 8192 128 27639 37546 1149431 488058 8192 256 26124 42720 997327 780942 8192 512 36938 61941 468009 473119 16384 4 5705 6359 275167 196156 16384 8 11336 12066 312391 251423 16384 16 18348 19267 411129 467298 16384 32 20676 22022 719162 509422 16384 64 37010 40693 570571 551220 16384 128 28289 51444 421248 620207 16384 256 29113 52390 885573 570850 16384 512 36291 55695 795182 563876 32768 4 6105 6684 381418 230349 32768 8 12426 16000 306741 352101 32768 16 12666 19173 417240 473451 32768 32 36165 34364 370888 288740