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: Wed Aug 19 01:58:33 2026 Auto Mode Machine = Linux oleg231-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-oleg231-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 4527 6646 538156 555990 64 8 6847 9595 718114 743988 64 16 2022 28047 720041 647135 64 32 4081 66529 460591 1285575 64 64 5093 113898 2444640 524487 128 4 3664 4758 123339 223435 128 8 3977 17313 303350 688467 128 16 3540 2751 1024942 824932 128 32 9762 46442 934004 877518 128 64 9441 60262 1105114 301138 128 128 7257 82572 1017175 1755594 256 4 4564 9400 581719 551540 256 8 12903 10000 651223 373240 256 16 10804 17469 439732 200631 256 32 5835 41681 973645 721210 256 64 9055 88092 746272 1311351 256 128 10695 42931 156846 288267 256 256 6848 18550 1391207 1842366 512 4 3631 2526 375381 751707 512 8 13980 27584 133576 189275 512 16 20374 32665 689001 235088 512 32 23458 41068 912733 1115688 512 64 27510 26615 1143004 971357 512 128 34206 67958 861818 1273106 512 256 34557 21171 936209 298186 512 512 14571 55447 2708713 759416 1024 4 7887 4090 139851 459806 1024 8 14026 7353 703769 690530 1024 16 24047 32531 395966 373709 1024 32 19719 35138 759525 270246 1024 64 25766 78049 700898 724179 1024 128 41266 77184 1283303 567981 1024 256 45030 110226 1718120 174444 1024 512 18060 85163 1383774 1622698 2048 4 5872 5348 183381 179823 2048 8 4937 13574 184571 236573 2048 16 11674 21134 628249 290536 2048 32 19461 31637 587836 717573 2048 64 29433 43658 1155834 521366 2048 128 20662 33833 1278301 433248 2048 256 33377 64337 784339 998968 2048 512 55782 63720 1478523 1481839 4096 4 5340 5372 405665 209064 4096 8 10872 10948 327130 379156 4096 16 14023 18144 457753 491656 4096 32 22476 32373 617696 787568 4096 64 36304 32910 1032766 602172 4096 128 20468 37102 396747 605120 4096 256 29691 55466 963547 872038 4096 512 36381 35769 778856 504240 8192 4 5279 7264 338233 325920 8192 8 10959 10090 550356 441830 8192 16 17354 16772 551239 319712 8192 32 23750 23890 806532 396727 8192 64 28354 33190 424850 519132 8192 128 29340 27230 489630 335712 8192 256 29971 46112 933896 245064 8192 512 35376 35934 927218 451325 16384 4 5052 5141 562270 303199 16384 8 8670 13171 425800 418256 16384 16 10784 17408 349152 445239 16384 32 16871 24602 971879 595155 16384 64 23707 25269 683749 342261 16384 128 23487 33778 554655 651086 16384 256 23685 37406 656203 655364 16384 512 35834 51417 1019035 1360706 32768 4 5865 6560 185613 171904 32768 8 9180 10405 547446 293533 32768 16