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: Fri Jul 24 19:54:39 2026 Auto Mode Machine = Linux oleg653-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-oleg653-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 1492 7591 116366 512471 64 8 2103 22175 710511 538156 64 16 3268 21533 987600 926260 64 32 3711 36592 1310683 176857 64 64 2299 60955 1679761 821391 128 4 4883 7526 691126 493989 128 8 6349 18202 652488 826202 128 16 3278 10132 1155043 332467 128 32 3365 27936 312169 1067750 128 64 4662 56861 1111981 1085013 128 128 4316 83562 571257 1939522 256 4 5547 4223 475779 80679 256 8 6135 9162 802614 302564 256 16 17445 27914 1028679 870268 256 32 11649 37143 1463250 1219045 256 64 9803 47408 379842 330300 256 128 13879 62543 1058076 980760 256 256 11884 92414 1461259 1504249 512 4 4383 10323 318202 323669 512 8 6423 5706 777002 154486 512 16 6361 14131 134387 441795 512 32 6761 20930 857687 1273861 512 64 14619 31202 1413929 1273106 512 128 10870 17249 793657 333366 512 256 14560 17299 1329871 216965 512 512 22103 79404 1071167 977103 1024 4 6057 3709 72986 63220 1024 8 5060 6267 154730 136752 1024 16 5593 9434 578539 267635 1024 32 9770 31660 498788 800731 1024 64 11223 18537 597784 544714 1024 128 12498 30052 955115 512293 1024 256 20889 30251 918354 1121751 1024 512 18279 33984 1063425 721018 2048 4 4274 6158 602176 152142 2048 8 6148 6706 315611 224909 2048 16 13003 24042 700658 925459 2048 32 14658 36671 1219848 991244 2048 64 20158 25190 284757 275082 2048 128 25477 59425 250978 636819 2048 256 40432 37982 948660 802512 2048 512 34599 32715 414836 600241 4096 4 4494 4326 326633 186131 4096 8 8009 11700 523795 345103 4096 16 10143 17611 271349 406625 4096 32 15720 17469 572627 397665 4096 64 26628 29508 594998 587169 4096 128 21635 45628 1417269 318335 4096 256 23193 57061 820989 186870 4096 512 27590 33652 641499 642098 8192 4 1852 4260 222415 195582 8192 8 7789 7911 427265 434796 8192 16 10455 10829 205566 216462 8192 32 14180 20173 446747 531984 8192 64 24208 28701 436071 571150 8192 128 29858 36111 347532 471295 8192 256 19160 33892 416346 280012 8192 512 28502 28972 492840 897664 16384 4 4790 4741 252761 244892 16384 8 8179 6069 416767 257431 16384 16 13760 13122 300993 405014 16384 32 14144 19883 480764 327438 16384 64 27978 34738 967637 823729 16384 128 33892 52036 929121 623793 16384 256 22941 24006 462210 485551 16384 512 29982 41635 779965 390905 32768 4 4532 4826 143929 135161 32768 8