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 Jul 3 23:30:58 2026 Auto Mode Machine = Linux oleg104-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-oleg104-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 3227 9953 633392 571375 64 8 6790 17080 818885 743988 64 16 3059 43304 390278 942521 64 32 4618 54651 1232453 743988 64 64 7422 72319 1599680 1392258 128 4 4911 8608 640042 441213 128 8 5256 16872 864797 75917 128 16 8075 28374 1123617 558771 128 32 9979 58985 1266785 978253 128 64 11967 74114 1359835 1421023 128 128 15507 112887 1539168 1911894 256 4 8351 17753 566377 523315 256 8 9172 15845 886067 527947 256 16 15892 33276 146709 380920 256 32 19854 51779 686182 864661 256 64 25503 108384 643033 446127 256 128 17506 121151 1445521 1907837 256 256 21137 142769 208825 2152625 512 4 16354 12589 670082 583110 512 8 10871 10135 839252 590648 512 16 30348 19946 1523247 801059 512 32 17679 64785 1312798 1030064 512 64 21720 75693 1112797 920558 512 128 30704 98459 1585086 1261144 512 256 27014 91165 1736314 2486072 512 512 45947 104465 635951 1207940 1024 4 9507 9398 692311 597119 1024 8 6004 7656 930894 168200 1024 16 36830 19447 108017 765344 1024 32 25763 43012 1014925 677674 1024 64 28103 75975 420382 1055843 1024 128 31219 41227 818587 397984 1024 256 26696 117632 1841906 530255 1024 512 53531 52515 1381993 894262 2048 4 9638 7190 337127 311434 2048 8 15554 16736 1129540 280902 2048 16 19120 17153 387076 272879 2048 32 17730 15730 1102856 704508 2048 64 27269 32073 675691 763359 2048 128 46020 57701 1482094 869972 2048 256 30491 52288 770203 852192 2048 512 38362 85967 557433 458795 4096 4 8221 5574 503309 602172 4096 8 18438 11603 431429 493620 4096 16 19825 23887 528581 392783 4096 32 23570 62621 835036 676138 4096 64 24182 45466 899997 1265011 4096 128 43899 60188 1537512 734031 4096 256 35567 60319 1680050 777376 4096 512 24433 40066 1636520 417272 8192 4 4350 5722 319474 204503 8192 8 12674 3036 564850 623251 8192 16 15767 16586 948907 424326 8192 32 27694 31525 894323 797342 8192 64 32132 45862 1002946 623907 8192 128 27802 57603 1213233 1380973 8192 256 41142 50894 1310100 1069337 8192 512 38128 58293 1194008 1013119 16384 4 7264 8387 384718 475986 16384 8 10771 9354 377912 217548 16384 16 17706 17920 690177 399901 16384 32 18132 25066 751864 386570 16384 64 24084 30549 918135 755227 16384 128 28822 51293 853024 413151 16384 256 33849 59926 1453002 1293645 16384 512 31653 40973 612348 901702 32768 4 5348 7465 251502 217084 32768 8 8880 11935 516267 527400 32768 16 20749 19538 647320 611299 32768 32 33493 37904 566705 598490 32768 64 29724 41837 1102264 794473 32768 128 39442 46410 1232295 426989 32768 256 39909 51057 849700 578734 32768 512 31980 42130 514361 435604