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 Apr 14 14:09:42 2026 Auto Mode Machine = Linux oleg229-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-oleg229-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 4663 9707 500060 404998 64 8 5741 13128 172537 496362 64 16 9299 30101 571375 312204 64 32 5789 38669 1087638 102074 64 64 10484 56886 1143223 1421755 128 4 4971 13809 556454 386570 128 8 12313 22091 747933 621518 128 16 13517 22603 821147 715059 128 32 7276 20675 1561553 836500 128 64 9701 84549 1057236 1030846 128 128 21146 44245 1133103 1424795 256 4 9936 11696 440634 441359 256 8 9741 10783 517016 572721 256 16 7562 20864 641497 532133 256 32 17696 32474 506050 403843 256 64 25864 49117 445202 1752173 256 128 10587 62286 1400278 465466 256 256 8625 68322 143016 1829808 512 4 10550 14792 66989 332026 512 8 4059 5362 498047 297319 512 16 5406 42613 405736 358044 512 32 14086 13129 551796 420678 512 64 12037 26872 1066910 1014013 512 128 16376 31710 1365383 731480 512 256 46435 47385 750656 898225 512 512 20494 95644 1620980 1237168 1024 4 5564 6058 433537 346765 1024 8 11857 10602 333983 487410 1024 16 12034 16464 261556 175521 1024 32 18638 30382 985580 752340 1024 64 43788 48710 460250 388902 1024 128 40704 83104 1410588 889631 1024 256 29759 75399 1273788 592180 1024 512 30437 74537 976172 1535119 2048 4 11193 3994 198121 323637 2048 8 10163 5953 151098 201495 2048 16 18023 12178 342299 132078 2048 32 26612 21857 75213 557613 2048 64 20720 42916 828120 1059072 2048 128 20188 16162 1300361 1129688 2048 256 24520 45793 1228396 712632 2048 512 38764 64578 662353 458159 4096 4 5192 867 214269 220416 4096 8 9070 8390 344197 353802 4096 16 8895 11702 226800 230878 4096 32 22298 45746 404662 866846 4096 64 33474 51401 446093 580993 4096 128 41294 92795 818057 749498 4096 256 23272 34326 601308 595782 4096 512 25295 62519 774607 1091699 8192 4 5488 15988 456251 216622 8192 8 27428 28099 421742 357650 8192 16 14790 39029 605919 752252 8192 32 20672 27348 772479 409640 8192 64 18124 33975 217369 465082 8192 128 18518 61689 608354 608074 8192 256 32242 47476 1199426 854044 8192 512 35561 57289 277515 318991 16384 4 5355 5934 295335 201322 16384 8 11551 15475 622894 485252 16384 16 17653 24940 604596 597629 16384 32 24877 29016 1239801 847762 16384 64 39793 40914 938485 712785 16384 128 37605 30322 468944 303076 16384 256 26853 45992 1291287 662057 16384 512 26117 71408 618777 419295 32768 4 6346 5493 303702 159086 32768 8 9464 9636 390118 364980 32768 16