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 Feb 24 16:40:04 2026 Auto Mode Machine = Linux oleg244-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-oleg244-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 8462 21311 610350 926260 64 8 11389 25806 1421755 771797 64 16 14918 57606 1124074 234481 64 32 25548 89127 1002351 983980 64 64 22809 100469 2662899 1638743 128 4 7211 25921 621518 789741 128 8 26086 41263 1332828 809997 128 16 11786 35214 1040839 859260 128 32 29555 84762 1319723 1076312 128 64 18252 63334 1220700 1878447 128 128 37936 130219 1598754 2673584 256 4 16522 18267 690151 761623 256 8 25258 36337 775373 710708 256 16 36823 64648 760006 599585 256 32 54120 47084 805021 1231629 256 64 30324 120067 2165650 1981783 256 128 52480 178397 1062263 1430119 256 256 56397 65657 632056 2102055 512 4 12046 21608 782951 384109 512 8 30713 38846 766464 205131 512 16 18050 44313 1337324 1337324 512 32 37034 64298 1207261 548834 512 64 34517 64705 1176828 1176828 512 128 40927 91476 810124 1299295 512 256 51680 235733 915847 1689859 512 512 56299 133154 2391924 1999881 1024 4 25324 21419 959596 565067 1024 8 30485 26228 853224 516668 1024 16 35786 40131 351073 1499741 1024 32 45255 111874 1250425 1067654 1024 64 62264 120213 1333507 849679 1024 128 83571 138938 1651398 2023250 1024 256 64285 154496 1537317 1560781 1024 512 97180 153959 683606 1372717 2048 4 20675 23396 552912 681318 2048 8 19637 33011 669320 474403 2048 16 38058 37949 1535341 749113 2048 32 54747 90184 389498 1419400 2048 64 52230 86195 979378 1521471 2048 128 65639 93795 1502575 1457451 2048 256 92854 90065 1330575 1196235 2048 512 57796 89475 1444461 1429082 4096 4 20227 21804 578275 625431 4096 8 27896 32432 905404 805666 4096 16 40544 62713 1430605 596568 4096 32 46361 76953 988439 746762 4096 64 87765 142851 1395964 1471785 4096 128 60938 130708 1671875 1425146 4096 256 93702 117819 2241689 1577900 4096 512 97517 152370 1879881 1643565 8192 4 19977 24300 722650 573792 8192 8 32684 40771 766687 1058401 8192 16 47050 52839 1106280 744397 8192 32 58947 68828 1045582 1230393 8192 64 75194 100654 1462066 837637 8192 128 90459 134191 1798863 1362140 8192 256 90319 109565 1814346 1324697 8192 512 89338 138149 1406352 681243 16384 4 16967 18644 503333 296747 16384 8 26633 28299 747204 752737 16384 16 36948 52038 801993 899083 16384 32 58039 78658 1198105 1091325 16384 64 78649 88839 1193568 987110 16384 128 78217 116529 1575997 828936 16384 256 90994 149961