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 4 21:07:10 2026 Auto Mode Machine = Linux oleg306-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-oleg306-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 4301 11138 603489 528618 64 8 6009 14090 809014 743988 64 16 9020 45071 668072 1013707 64 32 3703 29424 901377 1124074 64 64 6031 74239 426897 1143223 128 4 2595 3702 458548 673778 128 8 7176 17194 411772 681476 128 16 4610 30309 1319723 365764 128 32 10337 33050 756363 1185654 128 64 14373 10221 1093856 1316487 128 128 7269 68193 144794 479432 256 4 6261 9212 421768 506767 256 8 12112 24051 436870 738065 256 16 5842 10484 1079348 847597 256 32 20004 59039 1254656 1070737 256 64 17629 24076 1256123 377572 256 128 27195 86810 1523457 1260547 256 256 15757 129744 686182 2065659 512 4 5233 6678 282570 326127 512 8 10332 8966 794832 786391 512 16 14814 23937 1105920 832743 512 32 14649 46771 191828 986529 512 64 15321 52930 1344020 1273106 512 128 23053 27447 1589779 823167 512 256 18369 99610 1230786 1652157 512 512 28520 89695 332437 2150051 1024 4 8244 6083 605880 351418 1024 8 9756 8129 880512 751156 1024 16 9724 12788 644908 531963 1024 32 13550 14859 649688 371929 1024 64 22513 36169 497574 116841 1024 128 16306 35799 162535 503170 1024 256 17545 82633 763033 638770 1024 512 40483 51256 936170 1466957 2048 4 4980 5583 238193 226099 2048 8 7559 7388 444756 478713 2048 16 6805 12475 210224 256670 2048 32 17745 27049 911417 532946 2048 64 27094 34978 1488257 398534 2048 128 32691 50469 1103423 378347 2048 256 41070 37841 880043 880043 2048 512 31122 74971 1391126 1593737 4096 4 5434 5547 214058 415627 4096 8 8014 10735 640017 396976 4096 16 16297 15876 528451 323996 4096 32 13071 16533 1474438 220004 4096 64 2029 39556 1308662 672249 4096 128 19548 48508 304965 897645 4096 256 31570 42721 1743652 774887 4096 512 28531 61971 878010 631037 8192 4 4907 6236 181946 219401 8192 8 7931 10467 567940 492070 8192 16 22967 16317 541261 453720 8192 32 18621 21217 710384 698740 8192 64 21251 30481 954893 708831 8192 128 36532 44213 668623 647432 8192 256 39153 50213 1036561 790282 8192 512 44091 73303 359235 664074 16384 4 5536 6432 211349 328804 16384 8 8306 10972 311513 500535 16384 16 17340 23439 355084 465069 16384 32 23255 31521 716082 754712 16384 64 26321 34332 901205 408262 16384 128 29782 51561 847679 451125 16384 256 42302 76122 1049588 855999 16384 512 46822 63752 441475 669448 32768 4 6241 6780 348251 295571 32768 8 9606 13941 583796 262624 32768 16 14732 18319 504139 373889 32768 32