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: Mon Aug 10 18:01:06 2026 Auto Mode Machine = Linux oleg349-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-oleg349-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 6995 13117 592827 538156 64 8 6341 21672 889431 725882 64 16 9356 41052 1330167 355635 64 32 8737 62927 500060 432398 64 64 6805 68744 1279447 104416 128 4 7331 5863 677178 52353 128 8 5584 25990 1022989 460120 128 16 11607 11034 1130717 870405 128 32 16171 54795 1373754 1007629 128 64 16143 89332 1359835 1377278 128 128 17079 102813 228183 1618028 256 4 5326 9456 445202 161518 256 8 10327 21511 64482 355566 256 16 19518 21541 1325925 1011241 256 32 15762 68413 1384034 1180188 256 64 13104 78744 315638 579209 256 128 27391 106313 757861 1632308 256 256 15648 114485 1694118 1375171 512 4 3810 10851 267772 342675 512 8 10924 6696 446758 835334 512 16 12313 11324 1155924 997991 512 32 34853 64450 861818 697505 512 64 44013 91053 920953 1322500 512 128 28284 98976 1689859 1190529 512 256 23369 26804 1312798 718028 512 512 15684 132775 1821745 1179413 1024 4 11957 5086 245499 526485 1024 8 19317 21439 690975 793922 1024 16 8133 43457 271475 319713 1024 32 30544 25100 667977 995171 1024 64 30570 78606 203256 1227903 1024 128 36502 100469 418661 213289 1024 256 52718 107982 361687 1643185 1024 512 37364 86874 169061 416106 2048 4 12970 13449 560781 245948 2048 8 12151 13310 748264 285163 2048 16 34770 24081 540220 814303 2048 32 26515 62098 1047577 484381 2048 64 28918 34393 826845 336177 2048 128 58173 41767 885486 304081 2048 256 66640 94177 417193 1180454 2048 512 43952 114011 683106 867074 4096 4 12273 6305 379156 512131 4096 8 14083 9414 456270 318778 4096 16 20557 31726 335218 274606 4096 32 43563 27981 64146 513739 4096 64 21428 22780 626778 952383 4096 128 32475 19865 449325 656301 4096 256 61924 38105 438074 740294 4096 512 21905 50766 802504 133820 8192 4 5156 2566 249725 593065 8192 8 10142 10841 707736 498995 8192 16 11132 21678 1036842 658260 8192 32 24515 11879 736893 444229 8192 64 14700 36778 399648 890153 8192 128 33541 31667 1063610 729927 8192 256 36663 49763 751347 454886 8192 512 61358 97180 1136655 1396067 16384 4 8038 9241 595913 516180 16384 8 12133 11320 632707 612441 16384 16 19705 18864 747578 833369 16384 32 22439 34527 905146 653868 16384 64 34439 26657 848600 716269 16384 128 19535 32154 1043689 815450 16384 256 48251 46613 1434920 1168781 16384 512 37630 45139 1197478 1179899 32768 4 6182 6505 356619 350722 32768 8 13443 16206 593343 555455 32768 16 19265 22529 739735 806340 32768 32 20304 32054 944839 781547 32768 64 25488 38417 1000670 537058 32768 128 32018 36225 543796 803826