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: Fri Jul 17 07:44:41 2026 Auto Mode Machine = Linux oleg240-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-oleg240-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 8810 17988 889431 1083249 64 8 14473 39051 1357066 1083249 64 16 16347 60955 2067979 524487 64 32 17439 79706 1484662 2052169 64 64 19831 130384 1638743 1363961 128 4 15073 23155 1067750 680612 128 8 20631 42065 1436229 1254941 128 16 23827 58605 1997245 1057236 128 32 28532 66045 1663139 1802755 128 64 31690 112579 3036502 1727352 128 128 34753 151282 1637771 1637771 256 4 18784 21239 661657 1128110 256 8 22933 38964 1089202 1126926 256 16 33459 44467 1570244 944525 256 32 26210 97712 1274008 1044693 256 64 41076 93533 1696795 1649865 256 128 44756 139432 1652404 1755037 256 256 58810 161106 2842047 3368013 512 4 18154 15303 1089094 839580 512 8 31726 41619 1081961 930933 512 16 45034 67778 1182661 1383861 512 32 47854 106180 1475116 1239310 512 64 71201 128708 1467055 1723770 512 128 70504 176735 1642050 2486072 512 256 83768 127237 1614885 1848401 512 512 92872 233148 2753870 3634839 1024 4 20008 24282 1239598 1019019 1024 8 35709 42273 1662264 912695 1024 16 48036 65152 2142335 1732676 1024 32 68942 65983 2086145 1460969 1024 64 70645 136953 1540074 2331932 1024 128 72219 167237 2120127 1434138 1024 256 112219 192886 2003431 1793451 1024 512 90434 204271 1822368 1821595 2048 4 20625 24192 1148570 895455 2048 8 35269 41995 972944 776610 2048 16 54284 62616 2258247 1885491 2048 32 62038 91156 2392202 1919621 2048 64 90408 148870 2440457 2008023 2048 128 106345 153628 2497941 1565847 2048 256 97602 186147 2455806 2452301 2048 512 133386 197893 2701402 1988040 4096 4 19417 20572 1013334 523444 4096 8 30323 34545 1302412 736707 4096 16 52698 60571 1872096 1294171 4096 32 69475 82560 1887523 1316686 4096 64 90874 101758 1746666 1423729 4096 128 101794 110377 1698823 1838440 4096 256 90762 114762 1770973 1433710 4096 512 89383 147428 1892721 1799541 8192 4 18058 21307 817975 940182 8192 8 30830 30237 1351372 1259345 8192 16 51946 63331 1564593 1629597 8192 32 71627 86251 2073385 1696709 8192 64 79798 98402 2066526 1863042 8192 128 99181 143016 2073885 1746382 8192 256 104628 141730 1887606 1690116 8192 512 106530 156302 2097304 1912613 16384 4 17652 18130 634916 677581 16384 8 26812 31247 1053902 669501 16384 16 43473 47270 1634162 1391679 16384 32 66134 73012 1789625 1674051 16384 64 79987 100791 1627968 1263508 16384 128 93151 98714 1808178 1537251 16384 256 104777 138240 2126365 1584829 16384 512 113520 143614 2124196 2112962 32768 4 18432 18869 861179 814820 32768 8 28688 32741 1427613 1136396 32768 16 44791 57108 1879974 1511085 32768 32 65968 79010 1931059 1573864 32768 64 90521 103294 2084340 1850461 32768 128 99914 125560 1827140 1528699 32768 256 109003 128042 1702688 1722275 32768 512 102718 144179 1911135 1811797 65536 4 17063 19665 928745 852856 65536 8 30855 33517 1300416 1321345 65536 16 48051 56365 1775320 1434803 65536 32 67226 78831 1977370 1687767 65536 64 80889 104296 1944870 1667839 65536 128