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 27 14:02:17 2026 Auto Mode Machine = Linux oleg329-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-oleg329-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 1796 10324 122137 310759 64 8 3996 5891 886494 560635 64 16 4388 31221 1083249 874936 64 32 4410 57299 1232453 926260 64 64 1769 37382 1304314 852702 128 4 1380 6189 615814 304037 128 8 1611 7358 853794 702889 128 16 5734 22996 387966 748976 128 32 4704 20880 1076312 901083 128 64 9952 25708 1162547 1217930 128 128 3570 40595 1504659 1997245 256 4 5418 10958 624702 236360 256 8 3183 20886 865358 628725 256 16 6423 18068 372076 799625 256 32 14037 60650 1089202 490336 256 64 8641 35859 1280084 618584 256 128 11690 56029 688381 1413179 256 256 7101 57996 165680 1868008 512 4 5344 6246 538377 83498 512 8 6726 18628 932550 744153 512 16 13790 24244 777002 617482 512 32 14674 51638 1098566 236798 512 64 10419 19781 906185 1187895 512 128 21065 64346 722133 1279935 512 256 13060 50048 1426135 699322 512 512 23562 64613 1248678 238243 1024 4 10099 5763 364914 536079 1024 8 7462 8580 693765 806293 1024 16 15965 18756 424537 797460 1024 32 13660 20725 296208 351303 1024 64 11425 41680 269906 418294 1024 128 21867 57612 881234 458334 1024 256 16535 31456 1268896 581123 1024 512 17786 59174 219884 835953 2048 4 5007 5958 107023 145639 2048 8 7332 8835 369876 392722 2048 16 9763 16816 309560 461357 2048 32 14755 31497 1142156 817247 2048 64 28066 55760 516010 888509 2048 128 14172 23661 1271112 1124071 2048 256 23194 23670 1591375 411833 2048 512 26062 32338 835287 658949 4096 4 5704 8219 210321 110365 4096 8 7205 9109 235793 376192 4096 16 11340 12605 336261 309247 4096 32 15528 22401 719611 404300 4096 64 18747 36706 409602 392182 4096 128 37219 45002 1493797 707316 4096 256 41285 27714 578957 871331 4096 512 37303 62401 455520 606723 8192 4 1689 5873 231294 205616 8192 8 10764 9774 241224 450236 8192 16 17700 16529 249475 264452 8192 32 20244 15884 426491 482114 8192 64 25381 43405 394736 781830 8192 128 45448 47801 424169 334245 8192 256 15388 26957 558387 240530 8192 512 19700 40617 735694 475114 16384 4 6092 6409 283489 378217 16384 8 9862 9761 319875 540584 16384 16 12781 21071 455262 371057 16384 32 19789 26052 708405 472273 16384 64 20355 34553 627570 430104 16384 128 34559 41849 1081876 780488 16384 256 34867 51857 685694 604888 16384 512 30356 51211 734544 747578 32768 4 5972 5993 290110 200040 32768 8 10594 11612 370624 216380 32768 16 13408 19824 353190 483531 32768 32 19596 24637 466548 472801 32768 64