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: Tue Sep 8 21:30:59 2026 Auto Mode Machine = Linux oleg135-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-oleg135-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 7440 14544 598110 292156 64 8 11766 29251 901377 821391 64 16 7471 39000 592827 809014 64 32 16528 79588 2067979 2133730 64 64 11265 63870 2561267 1780008 128 4 10828 15028 803932 581781 128 8 8640 26096 789741 757430 128 16 17623 38788 934004 921183 128 32 19159 86316 1436229 1096089 128 64 14396 78194 1939522 1332828 128 128 22796 127741 1939522 3036502 256 4 13210 17976 703260 556687 256 8 12758 32854 1008392 782721 256 16 28259 50804 1062263 1052888 256 32 27018 72624 1413179 1740810 256 64 34920 109489 1549845 1662639 256 128 42932 89666 1639786 2061693 256 256 33661 119679 1619994 2533571 512 4 15442 17119 779258 595893 512 8 16245 27621 907717 1073309 512 16 33715 44991 1261144 926116 512 32 45633 74885 1248678 1213400 512 64 43485 107091 1541840 1213400 512 128 57091 111697 1426135 1326585 512 256 47002 113932 2107844 2065273 512 512 53454 133055 1712772 2105777 1024 4 16612 19661 641249 692870 1024 8 24781 33003 1013010 917570 1024 16 38942 55312 1572783 1068983 1024 32 43803 77599 1276817 1298041 1024 64 65048 88719 1777861 1338494 1024 128 54564 126714 2098375 1251882 1024 256 82874 118094 2133821 1454537 1024 512 91306 161108 2183727 1793451 2048 4 16785 17223 970196 624005 2048 8 25734 31295 1160362 951286 2048 16 44021 50280 1399968 1126577 2048 32 55696 77177 2015562 1168888 2048 64 68858 101450 1383954 1537539 2048 128 81766 113822 1563567 1270361 2048 256 92603 142201 1804302 1958129 2048 512 76244 107168 1576480 1933883 4096 4 17768 19026 938544 825645 4096 8 30900 32290 1021467 1020436 4096 16 45770 54873 1302708 1074224 4096 32 61553 71893 1835102 1620313 4096 64 76804 114711 1816283 1530663 4096 128 95337 114342 2071659 1338537 4096 256 83171 136816 2233238 1792593 4096 512 94762 154635 2261757 1526583 8192 4 15714 17124 607891 603906 8192 8 29052 32265 1125154 1177033 8192 16 48385 50846 1157719 1136693 8192 32 63761 83932 1671128 1317484 8192 64 81406 115727 1422244 1642293 8192 128 61535 124935 1717059 1727591 8192 256 82773 134189 2001405 1709456 8192 512 89222 139943 1674222 1704199 16384 4 17559 18620 722489 785645 16384 8 30520 31846 1075560 808295 16384 16 42440 50347 1713240 1516189 16384 32 60321 62355 1415705 1393542 16384 64 74474 112908 1912443 1706857 16384 128 91925 134389 1908195 1429903 16384 256 90879 148319 1648431 1707197 16384 512 105801 137679 2254886 1843986 32768 4 17583 18997 889130 742637 32768 8 30023 30309 1030116 993000 32768 16 45977 50748 1357920 1142973 32768 32 62044 77855 1696865 1448054 32768 64 85054 101186 2010287 1496116 32768 128 87429 121952 1662504 1376112 32768 256 95924 135476 1755201 1610056 32768 512 96498 143901 1898936 1579707 65536 4