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 04:21:26 2026 Auto Mode Machine = Linux oleg139-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-oleg139-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 1542 3732 674790 555990 64 8 4136 24306 1363961 695778 64 16 6712 24343 710511 598110 64 32 7331 44444 1143223 1033216 64 64 4134 73648 408077 1232453 128 4 6556 13794 667081 663782 128 8 3990 21167 895074 306992 128 16 13703 45055 1076312 662962 128 32 14911 71432 1196221 1121270 128 64 14282 96754 983630 1185654 128 128 11122 85559 1598754 1663139 256 4 9810 12314 662883 395076 256 8 7565 25156 868157 387240 256 16 11252 27556 856386 706964 256 32 9913 38248 1292410 483927 256 64 15257 63982 1122215 1391207 256 128 7834 101107 117210 1430119 256 256 25281 92685 1718521 461267 512 4 7151 14682 454705 430633 512 8 14701 21606 177774 310114 512 16 18694 37738 967855 915847 512 32 20755 59265 1179413 948197 512 64 36394 70234 1030064 1032540 512 128 38864 56245 1267097 1094088 512 256 23514 29142 1501940 1105920 512 512 30636 187671 554646 1954379 1024 4 6904 8119 227755 583174 1024 8 15835 20522 786507 785357 1024 16 12029 19965 1082454 948995 1024 32 31762 31230 816563 571381 1024 64 23781 39480 300477 556212 1024 128 30376 37734 326941 916004 1024 256 37752 60111 1686413 787084 1024 512 41200 99515 851195 351044 2048 4 5953 5491 209195 339364 2048 8 9208 7504 168173 831165 2048 16 7928 18284 485093 947718 2048 32 11889 20601 238279 329472 2048 64 14781 53483 463874 1131474 2048 128 40556 24241 1512630 1258081 2048 256 25002 43579 241964 296943 2048 512 36755 104859 478953 590219 4096 4 5490 6847 402595 215806 4096 8 6401 6652 136885 105184 4096 16 11403 16603 533473 178388 4096 32 21964 20562 279248 661074 4096 64 19226 26343 726120 670910 4096 128 15737 45612 533042 894095 4096 256 31164 47838 664269 748388 4096 512 37227 45594 510094 466783 8192 4 5676 4977 292977 134103 8192 8 9658 6623 262621 164660 8192 16 12493 19160 686332 591310 8192 32 27055 28081 607536 453553 8192 64 22423 28094 565743 545584 8192 128 32215 90589 1085622 711355 8192 256 28853 51057 910727 848895 8192 512 31228 56920 597126 643322 16384 4 8951 8020 302087 342891 16384 8 13402 13899 585455 478099 16384 16 29659 27913 515351 293237 16384 32 16800 26979 463138 354915 16384 64 17540 26540 838750 261082 16384 128 22687 31956 1035184 470546 16384 256 23744 41548 443086 446613 16384 512 30101 24712 578160 418162 32768 4 4750 6174 412118 295961 32768 8 9769 12165 423310 316028 32768 16