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 Sep 3 15:31:35 2026 Auto Mode Machine = Linux oleg152-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-oleg152-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 1768 4955 587635 420873 64 8 5466 20963 477808 152363 64 16 5135 28117 199460 752329 64 32 7187 50204 969761 789967 64 64 3597 57397 1210227 1526887 128 4 5619 6563 677178 329004 128 8 7174 18354 427851 673778 128 16 15464 6087 841746 653282 128 32 6446 36332 1152564 715059 128 64 11504 85505 1229084 715059 128 128 5482 62559 1421023 1067750 256 4 9774 15229 1012194 516022 256 8 6130 31601 782721 629094 256 16 5387 16369 1016025 231070 256 32 12697 55030 1237306 1321031 256 64 17728 28650 1184092 449112 256 128 15379 36456 873098 1231629 256 256 18877 120363 1334162 1855098 512 4 7510 3767 575917 79613 512 8 7270 6215 700463 111523 512 16 19726 6372 929322 177348 512 32 19894 46540 967855 321008 512 64 11624 45751 445553 209249 512 128 15004 20122 1094088 597385 512 256 31634 62485 1040545 1411141 512 512 27489 44759 1098566 860437 1024 4 6234 3467 182921 550509 1024 8 10245 9516 625559 318221 1024 16 9882 28648 572677 815169 1024 32 24117 38247 820463 567981 1024 64 22213 48388 912695 322231 1024 128 14232 25540 966941 377320 1024 256 25218 71568 312661 903669 1024 512 21899 71032 1124099 506912 2048 4 6203 7094 331865 158747 2048 8 14191 7676 218452 417619 2048 16 13594 20640 384014 609137 2048 32 18721 43605 622693 952552 2048 64 26764 41375 419741 460739 2048 128 16438 96362 959790 566214 2048 256 14886 47204 1168888 1101018 2048 512 37822 44640 1489548 964640 4096 4 5187 5404 174127 272178 4096 8 12939 10492 283600 195270 4096 16 13385 12188 278316 555016 4096 32 12398 14965 194721 549425 4096 64 13695 22727 458523 506484 4096 128 16309 59772 443433 386596 4096 256 30770 40510 427245 412781 4096 512 33782 34259 1320025 1486172 8192 4 6102 13060 432090 257295 8192 8 13271 15832 313521 339634 8192 16 35219 16347 679209 610613 8192 32 18874 28464 298814 459521 8192 64 26851 28592 996604 725856 8192 128 19265 27059 814138 351845 8192 256 27952 49505 508153 574877 8192 512 40906 47992 1226879 631661 16384 4 8442 3626 150615 161145 16384 8 5962 7094 419863 307796 16384 16 5092 6891 123664 300404 16384 32 8258 18504 628362 474733 16384 64 18818 34197 693444 540031 16384 128 23010 19025 848254 325563 16384 256 27936 41058 806577 642383 16384 512 30449 37985 805944 812173 32768 4 5917 7185