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 May 28 14:00:38 2026 Auto Mode Machine = Linux oleg402-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-oleg402-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 3709 5163 621657 537079 64 8 4430 20201 718114 771797 64 16 3478 30947 763021 821391 64 32 3971 22488 511494 1049372 64 64 2125 44755 1599680 1599680 128 4 5680 9544 568836 133324 128 8 4976 5026 848397 630273 128 16 3807 21308 499970 948860 128 32 5682 48267 889145 908709 128 64 10606 31698 1220700 82521 128 128 2790 47974 1471662 1543594 256 4 3741 5496 624339 344059 256 8 8351 11036 879535 223751 256 16 5829 11690 1173737 714967 256 32 11127 55242 984356 898674 256 64 13883 47370 1254656 1304976 256 128 8334 48447 1437779 1175022 256 256 10031 56249 1549845 1447470 512 4 3515 10633 576690 500484 512 8 7908 9078 389050 689886 512 16 9129 11329 1055375 518239 512 32 12338 23828 384384 276887 512 64 28404 19503 773643 1071167 512 128 13507 28423 1422357 1017858 512 256 24602 63092 1707325 1305615 512 512 21780 85875 1547395 2047551 1024 4 5595 6841 392923 144612 1024 8 14268 10059 313826 298992 1024 16 17368 17838 1135391 612446 1024 32 16659 27394 1241389 927477 1024 64 43320 72541 958739 223523 1024 128 24415 46957 439122 790707 1024 256 25053 38363 1019019 400470 1024 512 28101 89315 921705 1113318 2048 4 5210 4091 351775 202393 2048 8 11848 12706 979936 763020 2048 16 6974 10589 189842 171899 2048 32 14032 19326 742059 538796 2048 64 29710 46485 440807 192264 2048 128 21912 58712 386710 534040 2048 256 43569 60037 1566989 345007 2048 512 31330 41680 625914 1000947 4096 4 5487 7499 324670 331070 4096 8 1644 16112 238971 672933 4096 16 17625 17073 635425 319852 4096 32 22785 33694 1006624 632967 4096 64 23466 28699 579680 202230 4096 128 19546 34430 196337 340001 4096 256 26601 88116 415999 260376 4096 512 25924 54184 1723881 412741 8192 4 4352 5182 234667 358104 8192 8 11708 9298 336913 379574 8192 16 11667 14348 1117287 711296 8192 32 37374 23583 333985 491219 8192 64 24569 28290 506244 561747 8192 128 17935 33220 528824 695656 8192 256 24552 28451 584470 408743 8192 512 25258 34665 843850 831918 16384 4 4494 6219 248095 199188 16384 8 10255 10413 305211 366164 16384 16 17089 29786 532136 467569 16384 32 19622 28083 451822 341689 16384 64 30408 36331 870651 834938 16384 128 34339 38146 534449 616889 16384 256 32741 37058 444818 245195 16384 512 26332 36469 548103 515042 32768 4 4822 5045 312496 218489 32768 8