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 17 00:14:01 2026 Auto Mode Machine = Linux oleg359-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-oleg359-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 13885 21227 1163036 598110 64 8 15417 39929 1526887 763021 64 16 21391 54885 1879725 1734015 64 32 22971 80110 2133730 2067979 64 64 25858 98914 2203800 2801873 128 4 16264 24109 800337 542400 128 8 21657 37792 881842 1363288 128 16 36759 59560 1220700 1240443 128 32 35935 127498 2211113 1319723 128 64 44104 132928 1391557 1142750 128 128 38392 125972 2132084 1939522 256 4 16083 26021 861885 660030 256 8 27841 37492 1231629 1600674 256 16 26053 75161 2165650 1190657 256 32 46434 92757 2045979 958864 256 64 68287 152654 2672291 2019049 256 128 60763 180406 1985448 2486631 256 256 58916 214413 1755037 3326279 512 4 19756 26273 918982 773364 512 8 31416 42677 1520013 1347393 512 16 44853 67733 1931527 1789859 512 32 71518 83700 1848401 1218910 512 64 77225 112753 1580419 1551867 512 128 47337 211391 2391924 1322500 512 256 104040 144302 1723770 1854787 512 512 64605 222035 1190529 2572435 1024 4 17035 21068 1264413 889631 1024 8 33995 38808 1245710 973516 1024 16 43016 69076 1537868 1568189 1024 32 65830 115131 1326505 1750329 1024 64 73027 136297 1605111 1825466 1024 128 97766 118296 1521524 1289467 1024 256 65763 165619 1917562 1831694 1024 512 82847 250059 1831694 1806273 2048 4 20085 20883 1021418 856867 2048 8 36302 42501 952552 1142308 2048 16 47376 53723 1617749 1348327 2048 32 81344 107704 2056087 1998214 2048 64 97292 111316 1566704 1880538 2048 128 100441 141613 2522144 1738569 2048 256 116556 182792 1799389 1577928 2048 512 118081 196638 2077469 2605532 4096 4 20214 19876 771511 754866 4096 8 29856 36854 1286803 1129006 4096 16 46158 58607 1609384 1167284 4096 32 69027 99034 1662331 1169350 4096 64 85329 123978 1604424 1490556 4096 128 93179 137472 1682848 1882352 4096 256 104245 150477 1879675 1497703 4096 512 105317 189251 1878853 2449785 8192 4 18829 20967 709328 944992 8192 8 31655 37738 1099870 1167594 8192 16 58490 67642 1693281 1269676 8192 32 68436 95174 2115642 1637440 8192 64 102674 121749 1813963 1697128 8192 128 103555 157435 2554474 1720670 8192 256 106404 167737 1965457 1918487 8192 512 117869 201252 2393938 2025712 16384 4 19072 21551 760770 874418 16384 8 35252 36713 1120655 1033502 16384 16 49614 58718 1313576 1158711 16384 32 75655 95971 1873751 1698169 16384 64 95383 131757 2654613 1715764 16384 128 111148 148335 2181030 1754399 16384 256 120066 158569 2066825 1477494 16384 512 112822 185177 2034516 1756776 32768 4 20314 20628 992490 979846 32768 8 34129 36470 1234609 900490 32768 16 55187 62622 1717669 1250026 32768 32 78349 96034 1828890 1620879 32768 64 92856 146737 1624443 1655037 32768 128 128259 173253 2205877 2101294 32768 256 126799 192982 2363695 1932200 32768 512 138975 193603 2107836 1961569 65536 4 18676 20870 814516 770784 65536 8 31714 36164 1379765 1071390 65536 16 51931 60453 1498855 1059615 65536 32 75179 90874 2003617 1645928 65536 64 97821 134474 1829338 1533473