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 Jun 3 20:40:45 2026 Auto Mode Machine = Linux oleg260-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-oleg260-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 11019 22023 969761 1183548 64 8 17519 37602 1421755 1013707 64 16 20031 60666 1879725 1734015 64 32 19178 92506 1392258 1124074 64 64 19341 117900 926260 2561267 128 4 13791 18401 595328 576161 128 8 21202 32728 962469 821147 128 16 26369 60692 508012 1254941 128 32 17243 110154 2367096 2248149 128 64 38323 151666 2211113 2453642 128 128 36802 126745 1802755 1911894 256 4 13741 23559 797250 599585 256 8 23880 32035 996229 794889 256 16 40430 71526 1286217 1558845 256 32 32636 105353 2081678 1376935 256 64 43650 133752 2097948 1361224 256 128 47931 136455 1805197 2350543 256 256 49477 166683 2000242 2148318 512 4 12224 20135 673655 540002 512 8 25544 39956 963945 880908 512 16 39859 65148 1204552 1071167 512 32 63864 80274 1869318 1096322 512 64 66174 128255 1541840 1600443 512 128 73797 136601 1924603 1560891 512 256 75469 231664 2405320 2099600 512 512 97246 182008 2265742 2548017 1024 4 16771 19971 670166 587884 1024 8 28983 34817 1302766 961529 1024 16 34708 61082 1462960 1379773 1024 32 61805 89611 1428415 1214706 1024 64 81288 142124 1741104 1486247 1024 128 78841 138267 2398343 1345623 1024 256 95818 167976 1625769 1600327 1024 512 85226 191972 2024203 1750329 2048 4 14743 18912 911031 769927 2048 8 27479 31200 1497076 978931 2048 16 40503 44767 1180940 1234397 2048 32 75244 73857 1526066 1350023 2048 64 79352 116595 1845390 1164925 2048 128 73624 157721 1658030 1878893 2048 256 100201 167103 1967097 1556202 2048 512 101627 141807 1591375 1806199 4096 4 17879 20109 592678 733248 4096 8 30418 33560 944893 885797 4096 16 42285 58830 1386613 1215430 4096 32 75480 80424 1400288 1590021 4096 64 84890 114031 2233528 1398351 4096 128 101210 120004 1963457 1812450 4096 256 109762 169570 2037749 1928414 4096 512 99992 167882 1951413 1586936 8192 4 17998 19864 793732 611929 8192 8 32516 35979 995045 1018524 8192 16 49933 56498 1687046 1292700 8192 32 58877 87959 1834691 1242181 8192 64 91166 114891 1671859 1509468 8192 128 92329 144426 1975400 1678311 8192 256 131313 174052 2446960 1760610 8192 512 142333 172553 2247378 1817705 16384 4 18484 21131 702697 636422 16384 8 33374 34497 967691 1042581 16384 16 49939 56906 1311570 1170872 16384 32 67916 86915 1791771 1269273 16384 64 90148 112374 1004849 1304573 16384 128 98481 151326 2264247 1779338 16384 256 122618 155214 2048221 1722991 16384 512 112675 191892 2130519 1624735 32768 4 18522 20310 764821 586149 32768 8 31297 38242 1399029 990388 32768 16 45239 47674 1284874 1311981 32768 32 67903 86375 1916144 1660636 32768 64 90020 117908 1964401 1618265 32768 128 107577 157425 2252550 1698878 32768 256 115211 168676 1838726 1694584 32768 512 119246 153898 2166207 1710571 65536 4