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: Wed Jul 15 09:32:14 2026 Auto Mode Machine = Linux oleg324-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-oleg324-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 8333 22053 586352 473593 64 8 16309 36929 889431 444572 64 16 18181 42522 926260 659861 64 32 21198 65173 1526887 1304314 64 64 14094 82170 1828508 1679761 128 4 12856 19999 895074 1162547 128 8 23955 32888 677178 771581 128 16 27984 61988 1455701 1349580 128 32 31126 104149 1377278 1684006 128 64 15668 148973 1067750 1377278 128 128 42694 142526 1967960 1508887 256 4 15173 17609 621088 962301 256 8 25932 29114 891956 729045 256 16 34628 74113 1437779 1369908 256 32 52096 97446 2285501 2118645 256 64 51170 122129 2441400 1219045 256 128 49930 158513 2015259 1506359 256 256 64192 102850 1683493 2975955 512 4 17649 20514 849208 755144 512 8 31882 40812 930933 1344020 512 16 50899 60975 1069035 1218910 512 32 51122 109874 1723770 1024169 512 64 83184 154541 1736314 1947291 512 128 72799 139060 1999881 1917728 512 256 93687 143983 1848401 1827947 512 512 82352 232517 1570020 2089386 1024 4 21805 23141 649394 621755 1024 8 31469 42666 1248970 768769 1024 16 49603 63811 1227903 1065535 1024 32 74315 88928 1406891 1278338 1024 64 84578 158049 1521524 1418508 1024 128 91485 124604 2142335 1582636 1024 256 86999 130594 1765437 1652033 1024 512 133488 177193 2035716 2031864 2048 4 20108 23125 911031 990330 2048 8 34432 38052 1052971 1042745 2048 16 45214 62555 1275264 1284033 2048 32 58936 77965 1391351 1302727 2048 64 82864 110871 1944829 1954565 2048 128 132755 177761 1584915 1561009 2048 256 104091 175944 1794877 2176427 2048 512 125305 223383 2494314 1570427 4096 4 18957 19598 1103196 626595 4096 8 33968 39438 1326855 1335519 4096 16 56129 66096 1625987 1400859 4096 32 73004 92844 1495487 1577175 4096 64 96055 134070 2089803 1825353 4096 128 122246 126881 1882352 1635896 4096 256 130845 180328 1747376 1529437 4096 512 110143 188632 2062457 1552658 8192 4 20116 21185 764674 892557 8192 8 33541 36362 1101351 1081147 8192 16 54060 65675 1582682 1453223 8192 32 79034 104861 1984986 1839701 8192 64 116643 126246 2059343 1858407 8192 128 106594 158100 2213500 1998611 8192 256 138073 174123 2140152 1867396 8192 512 113708 195756 2175795 2118512 16384 4 19518 21159 857580 664528 16384 8 35361 39392 1211923 1141257 16384 16 46778 58041 1377259 1213186 16384 32 74764 88850 2052381 1047779 16384 64 85533 116909 1965952 1365546 16384 128 110117 134802 1998077 1589631 16384 256 115965 149850 2028451 1589595 16384 512 116985 154233 1910636 1486475 32768 4 18375 23046 999121 1049418 32768 8 37104 39756 1657472 1379994 32768 16 59255 63028 1350369 1117101 32768 32 79565 102473 1658732 1675598 32768 64 114268 138569 2527807 1554092 32768 128 125177 178934 2082099 2080523 32768 256 146500 172256 2426158 1773158 32768 512 135010 200257 2731580 1782980 65536 4 20638 22896 797254 872382 65536 8 34345 37384 1526651 1101353 65536 16