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 17 06:49:54 2026 Auto Mode Machine = Linux oleg420-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-oleg420-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 12150 18286 1066042 874936 64 8 15732 36970 615952 1017549 64 16 15432 66811 1599680 1599680 64 32 19988 83447 1780008 831569 64 64 17611 105070 1124074 2801873 128 4 12812 14631 1085013 488594 128 8 19305 26457 848397 650117 128 16 29466 59258 1705404 1349580 128 32 30053 86608 1939522 766076 128 64 19667 122021 1852520 1521718 128 128 34189 143325 1377278 1778862 256 4 17737 23492 1137672 1075025 256 8 21006 30974 1292410 1272498 256 16 39746 69965 1062263 1180188 256 32 48456 109545 1391207 1907837 256 64 51427 145457 1952947 1158540 256 128 59481 188085 2345409 2726577 256 256 53124 201914 1707589 1642294 512 4 19691 16888 819398 873740 512 8 29206 30684 867738 829847 512 16 36946 69794 951558 1422357 512 32 58708 88813 2016784 2047551 512 64 63428 149267 2132967 2277758 512 128 75116 184891 2557119 2548017 512 256 93159 212626 1383861 2265742 512 512 96490 192706 2438090 2830083 1024 4 20793 21613 490640 454503 1024 8 32899 39609 1412443 1189476 1024 16 55416 72148 1848247 1628234 1024 32 69096 79213 1177088 1600327 1024 64 95017 87550 2165014 1499217 1024 128 88100 192661 2120127 1267398 1024 256 119891 211222 2260740 1416169 1024 512 118010 207578 2443368 1646334 2048 4 17999 21396 1037957 582139 2048 8 35529 32082 1431225 1255690 2048 16 42780 66205 1464907 924662 2048 32 72410 103895 2167092 1759581 2048 64 86089 131214 1612586 1318727 2048 128 114894 164234 1997749 1379952 2048 256 100392 156923 1633127 1316100 2048 512 98803 214679 2429413 2308622 4096 4 19891 22761 998492 887353 4096 8 35047 39232 981269 1144423 4096 16 51884 50956 1596819 1752546 4096 32 54576 101466 1261018 1846740 4096 64 102904 117192 2399488 1979519 4096 128 94469 168448 2389808 2084478 4096 256 112016 169923 1560415 2096178 4096 512 141681 170291 2519114 1794840 8192 4 20429 21087 561132 360755 8192 8 31879 36833 1355852 1124380 8192 16 53671 70246 1268738 1248999 8192 32 81406 91307 2002922 1698219 8192 64 98765 124347 1596582 1728634 8192 128 104330 154592 2290831 1820402 8192 256 130956 192770 2179936 1885431 8192 512 126410 167196 2383476 2059836 16384 4 19224 22656 862900 870331 16384 8 31850 34452 1205841 1079242 16384 16 54002 67522 1760015 1516323 16384 32 78321 94324 2143076 1513651 16384 64 95868 132116 2127221 1844431 16384 128 121479 171713 2246850 1951658 16384 256 109231 163398 1976128 1530916 16384 512 130358 200922 2249939 2013533 32768 4 20129 20422 728922 577145 32768 8 33666 37164 1258992 1040323 32768 16 51482 68142 1272055 1502363 32768 32 71543 102660 2224118 1758975 32768 64 108375 124666 2356360 1424329 32768 128 101421 151713 2116242 1836147 32768 256 133368 182691 2021583 1847327 32768 512 125406 191347 2286502 1665971 65536 4 19244 21897 927983 767760 65536 8 33311 37789 1455097 1022402 65536 16 50382 59834 1739042 1325806 65536 32 72244 89720 1592730 1765945 65536 64 102417 135366 1872034 1984193 65536 128 128401 169241 1843274 1669034 65536 256