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 Jun 12 12:24:03 2026 Auto Mode Machine = Linux oleg240-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-oleg240-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 1966 20698 577521 566551 64 8 8685 6497 106657 532815 64 16 6354 25478 429630 46613 64 32 8077 51943 1049372 863676 64 64 12713 93832 1484662 1562436 128 4 8806 16631 606767 335166 128 8 10115 17802 831319 476031 128 16 10704 57834 1123617 691126 128 32 8794 82904 1243315 498114 128 64 18478 108113 128906 1229084 128 128 9488 67719 1421023 1905110 256 4 5124 6654 629094 379708 256 8 16283 19862 461267 555248 256 16 20620 40093 1300235 848267 256 32 32548 67710 1286217 1019886 256 64 35354 82870 460476 1016025 256 128 18845 102644 1398455 1185399 256 256 15903 25884 1048775 2049885 512 4 11717 11715 659788 516122 512 8 17622 29350 786680 685263 512 16 27105 38386 690996 596058 512 32 23578 65315 1115109 665101 512 64 16570 63767 779258 900108 512 128 28380 69283 999850 1264113 512 256 52367 34982 1537424 1316016 512 512 38220 118300 1012101 1209982 1024 4 8982 6003 171498 423993 1024 8 8428 12357 542649 283499 1024 16 31063 18709 700440 568207 1024 32 19002 50858 927677 1077836 1024 64 30709 49030 521942 882683 1024 128 45765 99244 1128826 1099918 1024 256 51662 96375 1203137 925877 1024 512 53082 68239 527844 2011877 2048 4 8393 10437 505058 396364 2048 8 12445 13532 340319 753185 2048 16 11562 13667 565469 779570 2048 32 33297 41081 405552 1090535 2048 64 14708 19346 297839 995149 2048 128 16314 40421 712337 318454 2048 256 27466 34202 1117927 1358993 2048 512 29007 52626 1617749 1078486 4096 4 4957 4940 384235 114040 4096 8 14605 10867 457607 541869 4096 16 18483 25995 870404 642603 4096 32 19219 34961 636319 825605 4096 64 25197 54475 878774 935375 4096 128 43631 66345 654725 689904 4096 256 1571 58956 504996 1438632 4096 512 19890 43225 1703877 1167284 8192 4 5880 6329 140780 200976 8192 8 10828 16251 424148 421919 8192 16 18057 24027 456608 688975 8192 32 26210 39432 664446 454278 8192 64 30150 31693 1218698 853323 8192 128 39824 47709 1248591 1009725 8192 256 35392 59246 1191028 1088925 8192 512 32399 53762 1013716 1032636 16384 4 8024 6761 240626 141426 16384 8 10990 12091 613447 484117 16384 16 14311 16372 322405 423893 16384 32 28171 28334 636298 243555 16384 64 23219 43867 673404 768693 16384 128 42264 46481 868714 806492 16384 256 36508 45345 983550 948537 16384 512 57939 86360 560710 336061 32768 4 8556 6944 218625 166156 32768 8 12846 13959 684420 340132 32768 16 12603 21417 355339 167043 32768 32 21684 30016 440323 598643 32768 64 25925 37802 506351 625556 32768 128