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: Tue Sep 8 16:58:38 2026 Auto Mode Machine = Linux oleg425-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-oleg425-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 10840 22735 520419 651849 64 8 16198 37867 983980 645579 64 16 20311 45747 1421755 1638743 64 32 26271 97407 1518251 1330167 64 64 25020 134432 1599680 913649 128 4 16502 24777 770474 852438 128 8 21559 47406 1231904 1504659 128 16 35087 65037 1306873 1852520 128 32 34159 123537 2166499 2066432 128 64 40215 104068 1217930 2098744 128 128 21865 132665 1539168 2098744 256 4 22264 24818 808050 663292 256 8 30925 35093 907792 1027695 256 16 29294 75140 1967260 1487577 256 32 45342 95811 1325925 1881098 256 64 42738 152828 2210228 2330140 256 128 62030 182088 2665657 2463808 256 256 53916 178754 1662639 1985448 512 4 21530 24326 1118011 651383 512 8 33824 42553 1454140 1479181 512 16 51780 68021 1267097 1406520 512 32 52389 107450 1413929 2141475 512 64 68285 155055 1910902 2073249 512 128 85377 191469 2402629 1705969 512 256 73446 224472 2327124 2668325 512 512 103729 247954 2609952 3372274 1024 4 21468 23728 630981 619156 1024 8 39559 42465 1136593 958739 1024 16 52277 71523 1292961 1479591 1024 32 72097 96007 1892218 1372717 1024 64 74364 112963 1418508 1354535 1024 128 73184 210230 1988589 1444266 1024 256 111962 157153 1822368 1738989 1024 512 102984 205374 1888889 2240689 2048 4 22848 25950 713579 774579 2048 8 34363 40263 1404776 982289 2048 16 53247 63344 983189 1012867 2048 32 71653 95482 2011785 1660915 2048 64 81173 133281 1984824 1812296 2048 128 98262 146934 2417789 1652925 2048 256 110196 191757 1963500 1976603 2048 512 115406 176291 1980248 1820362 4096 4 20768 21461 870360 742694 4096 8 34630 38234 964196 966257 4096 16 52836 61894 1331586 1015610 4096 32 81314 106941 1392796 1936675 4096 64 91571 108617 1783289 1548460 4096 128 89747 165702 1712369 1406594 4096 256 94150 141397 2356697 1649087 4096 512 125667 168407 1809968 1724746 8192 4 22141 21643 409474 602001 8192 8 34420 40596 1357190 1198715 8192 16 53000 58963 1276800 992975 8192 32 65013 90208 1554471 1204345 8192 64 81935 105145 1465433 1283621 8192 128 92452 140886 750035 1452732 8192 256 85028 137622 1152322 1497364 8192 512 82614 121819 1436455 1251638 16384 4 14159 7977 200253 125762 16384 8 7406 13786 348522 301741 16384 16 16786 20086 757007 701220 16384 32 20383 30038 633004 626540 16384 64 41926 50728 1011609 746181 16384 128 33548 55541 450059 957125 16384 256 34557 66252 676380 1114331 16384 512 46293 64403 680877 580107 32768 4 6551 7026 401263 244552 32768 8 12033 16763 685796 384555 32768 16 19158 28814 860936 539791 32768 32 33513 42737