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 Jul 13 10:11:17 2026 Auto Mode Machine = Linux oleg310-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-oleg310-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 2677 9532 533875 533875 64 8 2459 9425 735831 842003 64 16 2687 22510 916769 347801 64 32 4264 10706 1392258 1066042 64 64 3891 67011 1599680 1768283 128 4 2259 3922 496272 581781 128 8 3096 18031 881842 785122 128 16 6835 20718 836500 172084 128 32 7800 38800 1155043 927549 128 64 4889 36187 512376 711270 128 128 3180 45055 1220700 1133103 256 4 3389 10791 359495 483056 256 8 6765 16608 934659 842278 256 16 4733 23645 1084800 356038 256 32 6918 28331 1195962 370025 256 64 12831 40967 889002 1058076 256 128 13445 30706 1422540 1084800 256 256 6589 54361 1393012 2000242 512 4 4733 7120 449094 267206 512 8 4534 10185 254839 679195 512 16 8220 17142 690996 438279 512 32 9225 35625 831132 535024 512 64 7804 57996 1306409 543006 512 128 18086 30532 1375881 1179413 512 256 15783 72902 1336492 1585086 512 512 11716 70914 293259 1770674 1024 4 5264 4190 498556 436134 1024 8 14372 17316 517228 351763 1024 16 10193 14878 334738 552634 1024 32 17327 26255 324349 364914 1024 64 17776 63971 702847 1028043 1024 128 16925 32888 964120 581831 1024 256 29689 47126 929283 375933 1024 512 20132 38771 538702 1651398 2048 4 5258 4908 256317 284917 2048 8 6493 6550 200372 228268 2048 16 16287 11765 352367 252371 2048 32 18169 18584 632505 282166 2048 64 22720 46846 404597 657839 2048 128 29295 36107 824860 800567 2048 256 21874 33275 172621 463548 2048 512 21110 40809 457037 1620190 4096 4 5760 4143 131963 154413 4096 8 5562 12791 304403 189822 4096 16 15923 19638 181247 319846 4096 32 36487 31348 548110 261976 4096 64 48682 44690 570327 276400 4096 128 23742 33775 822995 814644 4096 256 38998 110651 1511406 999712 4096 512 53453 50452 466517 1486687 8192 4 5824 1786 220280 192191 8192 8 8816 7081 259297 562520 8192 16 13480 17850 683411 375899 8192 32 22083 23214 626159 472241 8192 64 18304 25457 402259 283302 8192 128 32794 42004 922314 414593 8192 256 41443 45595 1045423 401315 8192 512 38996 47265 755245 1173295 16384 4 7465 7388 175713 330215 16384 8 9044 8690 168856 529385 16384 16 12249 13745 869637 474621 16384 32 15455 15015 284671 223404 16384 64 28153 38735 366172 404353 16384 128 35681 24550 1085670 511538 16384 256 38675 35907 560825 476735 16384 512 33217 36657 698291 320569 32768 4 4587 7324 324294 249442 32768 8 11920 13727 221466 707719 32768 16 19385 16907 573697 254631 32768 32 32270 24336 513733 514031 32768 64 34797 31228