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 22:29:47 2026 Auto Mode Machine = Linux oleg430-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-oleg430-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 11525 24271 1143223 998622 64 8 13177 38256 1484662 1492919 64 16 14828 59535 1879725 1163036 64 32 14665 56934 1460430 673098 64 64 14414 118055 1363961 2923952 128 4 13447 14399 747933 492178 128 8 14743 37670 1557024 889145 128 16 20772 44769 877518 1858934 128 32 23871 69454 2202044 1229084 128 64 30865 117328 1663139 1705404 128 128 26391 121003 1579934 2066432 256 4 17453 16819 792543 1052888 256 8 23538 31733 873809 1112909 256 16 21290 56560 1112909 802614 256 32 35374 61937 1694118 1325925 256 64 40087 103565 1489641 1354356 256 128 26061 99266 2081678 2719671 256 256 53792 123322 2911402 3009318 512 4 17105 21031 762924 1011625 512 8 27331 34403 1667552 1276891 512 16 36064 61619 1954379 1897396 512 32 55459 84126 2016784 1975959 512 64 55506 119651 2625909 1306409 512 128 74341 157731 1531941 1595686 512 256 56926 178513 1667552 2141475 512 512 66056 161966 2141475 3239989 1024 4 19096 19305 678209 871578 1024 8 29835 41071 1602118 1220575 1024 16 42551 61520 959596 1328146 1024 32 69603 69235 1587902 1048113 1024 64 68149 142020 1888889 1326505 1024 128 62683 142875 1987669 1602118 1024 256 89652 142067 2211841 1816203 1024 512 83320 136115 1652033 2230218 2048 4 17502 21723 804466 857980 2048 8 30940 36724 827482 1157079 2048 16 49775 65748 2044343 1753475 2048 32 80018 101956 1397918 1667687 2048 64 101080 140593 1626633 1982533 2048 128 84993 155364 2354177 1590196 2048 256 86812 196319 2329912 1837102 2048 512 103018 195573 2441150 2361944 4096 4 19464 22623 1230049 1059256 4096 8 34301 34342 932178 1243493 4096 16 56228 70936 1569395 1556174 4096 32 77131 89848 1945007 1854114 4096 64 79503 101786 2114496 1622762 4096 128 99378 145760 1742944 1596225 4096 256 97207 172426 2244324 1699495 4096 512 97454 182971 2375598 2113455 8192 4 19153 21372 651408 894999 8192 8 29966 36870 1240253 732198 8192 16 50532 60084 1560968 1570242 8192 32 70136 93842 1217618 1057977 8192 64 86469 98732 1688040 1424662 8192 128 94683 110067 2166603 1643943 8192 256 119587 141551 2123881 1549145 8192 512 109894 127157 2380009 1897195 16384 4 18695 20886 1042375 1020109 16384 8 30181 34298 1103381 1323009 16384 16 50257 58739 1340402 1669455 16384 32 74309 96513 2230079 1294254 16384 64 86049 129775 2629423 1678508 16384 128 111337 145374 2555976 2154701 16384 256 126832 164953 1901384 1876309 16384 512 123433 167450 2660163 2166658 32768 4 20245 21950 1093172 1087954 32768 8 35744 38280 1431092 1224424 32768 16 48880 56135 1369789 1558745 32768 32 65668 78791 2176119 1766571 32768 64 87784 103872 2185115 1913796 32768 128 102771 124000 1684738 1415090 32768 256 99290 139287 1948167 1495986 32768 512 103342 142176 2303247 1757378 65536 4 17359 18144 782958 799784 65536 8 28108 33006 1179724 1043469 65536 16 46001 51896 1369522 1212080 65536 32 63146 72158 1882740 1311085 65536 64