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: Tue Sep 8 00:39:08 2026 Auto Mode Machine = Linux oleg103-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-oleg103-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 2168 3826 604849 125742 64 8 1815 14794 176392 780776 64 16 2746 52543 1828508 735831 64 32 3494 33177 1452528 1392258 64 64 3430 34575 1518251 1734015 128 4 3369 6186 627328 595328 128 8 4079 14566 811221 95941 128 16 6931 28810 1852520 1040839 128 32 7510 42340 1391557 1000121 128 64 5276 21512 1521718 743788 128 128 6637 52185 1406136 1067750 256 4 3964 6614 569079 627256 256 8 5822 11701 795478 351147 256 16 7491 9616 1093639 897923 256 32 11184 49306 1413179 1286217 256 64 5848 63667 794889 432471 256 128 22252 49333 1622442 1561112 256 256 17887 71588 735537 2152625 512 4 9645 8014 401263 370204 512 8 12599 20319 866338 842214 512 16 18157 35761 1108203 906185 512 32 15605 50970 1336492 1096882 512 64 29972 50607 1510391 381245 512 128 25242 85762 1718254 641651 512 256 10060 47054 1350783 1293037 512 512 29684 51406 1451192 1961520 1024 4 6780 5266 273359 600543 1024 8 14838 10233 319214 794363 1024 16 7329 12571 973296 864908 1024 32 11772 22091 833196 976172 1024 64 8629 26930 1424152 188824 1024 128 18026 46349 1400469 336944 1024 256 34810 98737 2300703 1271902 1024 512 20709 85526 1692394 471001 2048 4 8357 4748 186248 357484 2048 8 10059 8226 418555 589530 2048 16 14348 24523 1147956 1003402 2048 32 27772 48985 1251847 1189279 2048 64 18467 21924 553946 252906 2048 128 15802 42576 821861 254918 2048 256 31085 85095 1005399 938092 2048 512 32511 48336 866025 1574169 4096 4 6515 4326 227340 118415 4096 8 9857 9122 230968 272939 4096 16 21387 28700 460428 672012 4096 32 22557 47662 389506 317423 4096 64 17432 31507 439351 295909 4096 128 36483 42269 1158000 877069 4096 256 42411 39598 1063320 358355 4096 512 24965 95663 1818782 387958 8192 4 6415 6038 390505 364606 8192 8 6870 2167 186312 218552 8192 16 11641 16952 475147 664125 8192 32 17279 22276 284178 336221 8192 64 23865 23594 347813 186972 8192 128 21090 47292 857882 567940 8192 256 41258 36282 994901 723472 8192 512 35773 60365 788143 794026 16384 4 5351 5690 184714 237532 16384 8 9725 9221 368386 190334 16384 16 15796 12775 616120 407540 16384 32 14920 22933 501544 320512 16384 64 19894 39329 761225 384086 16384 128 31945 29486 1106134 698171 16384 256 21317 42822 769312 552022 16384 512 29149 31310 576961 501591 32768 4 4516 5700 304813 283939 32768 8 8798 13142 446503 581363 32768 16 16407 16734 551620 470818 32768 32 24739 21029 901855 588145 32768 64