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 May 11 17:33:52 2026 Auto Mode Machine = Linux oleg313-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-oleg313-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 13709 23624 1029254 546928 64 8 14705 34504 249985 647135 64 16 17376 54100 842003 695778 64 32 25276 67500 1304314 1562436 64 64 21087 82145 1484662 225423 128 4 13568 21735 253983 559353 128 8 20672 37614 785122 744820 128 16 23113 56561 1032829 877518 128 32 35223 87971 1231904 1243315 128 64 36888 124166 1022989 1455701 128 128 32056 167103 1391557 1471662 256 4 17234 25523 721210 502028 256 8 29788 41981 876662 673696 256 16 23936 68448 1293967 873809 256 32 57682 104665 1118707 1070737 256 64 43205 132924 1093639 1230218 256 128 60967 173105 1489641 1354356 256 256 58893 140490 1855098 1683493 512 4 19774 24711 686358 610982 512 8 33074 44103 497585 754083 512 16 40156 63280 1064266 816594 512 32 63234 105373 1835760 1153441 512 64 69160 153109 1533034 1309596 512 128 84811 154642 1450212 2132967 512 256 76472 171581 1560891 1541840 512 512 90348 190619 2022482 2180616 1024 4 22900 24718 569563 441741 1024 8 35282 35545 854752 820463 1024 16 54532 74424 1256277 1230718 1024 32 63015 94849 1345623 1135091 1024 64 90621 143799 1497127 1153071 1024 128 69711 183054 1625769 1345201 1024 256 89990 199452 1599731 1796451 1024 512 91200 171067 1861867 2008114 2048 4 21370 25441 751012 677022 2048 8 33690 36797 872623 889705 2048 16 45979 77581 782268 949079 2048 32 78215 99152 1072293 1449580 2048 64 88306 119921 1593737 1198237 2048 128 91859 148082 1228571 1231566 2048 256 110119 165137 1873565 1497076 2048 512 115850 165322 1880538 1843014 4096 4 22898 25574 610974 662144 4096 8 39397 41677 998028 535285 4096 16 47535 60206 1388855 1106108 4096 32 68154 107766 1549717 1256039 4096 64 87968 132048 1636987 1322972 4096 128 103103 164432 1670412 1447358 4096 256 90057 155510 1337599 1425619 4096 512 112210 182613 1662331 1563966 8192 4 21950 24581 675298 729803 8192 8 38941 41525 1211863 1009992 8192 16 61393 69822 1339623 1150085 8192 32 78213 104686 1557430 1295137 8192 64 91007 106254 1175986 1219217 8192 128 102950 162914 1823203 1496582 8192 256 113915 169056 1720326 1493524 8192 512 121759 189013 1722136 1326179 16384 4 22452 25003 735268 645496 16384 8 38116 42942 1005835 921854 16384 16 61352 72503 1423830 1027660 16384 32 78077 107108 1500366 1502859 16384 64 97192 149673 1808559 1490667 16384 128 109400 167859 1969953 1682453 16384 256 121091 179669 1902490 1614998 16384 512 114832 168146 1921427 989256 32768 4 22646 24927 654705 592624 32768 8 38541 42230 1038829 893645 32768 16 60122 70828 1372018 1208118 32768 32 80594 98262 1593387 1411863 32768 64 101353 136339 1136358 1180748 32768 128 104899 168524 1722814 1332847 32768 256 119014 180556 1668175 1363619 32768 512 118651 178455 1943896 1688899 65536 4 22085 24408 721832 554910 65536 8