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 Oct 24 12:12:29 2025 Auto Mode Machine = Linux oleg144-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-oleg144-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 10861 25558 1066042 454354 64 8 11074 33971 852702 901377 64 16 13069 48596 983980 877797 64 32 10734 65109 1226821 1087638 64 64 16198 81201 1226821 1452528 128 4 12587 24638 650117 529038 128 8 15301 31495 821147 667081 128 16 21955 53135 723735 843068 128 32 19453 68123 1102844 1074159 128 64 18361 83666 1705404 1243315 128 128 13148 62045 1471662 1885042 256 4 14261 17140 560172 566377 256 8 19313 29550 947860 792543 256 16 23296 49002 1248819 807442 256 32 35869 82469 1384034 1237306 256 64 31710 93224 1453348 1938842 256 128 29778 121042 827989 1673001 256 256 31754 120919 1778290 1089202 512 4 16130 21507 613776 459668 512 8 24655 34492 841884 725058 512 16 37951 62399 1282994 1098566 512 32 43404 77468 1365383 1062161 512 64 46531 98822 1426135 1282994 512 128 60837 150280 2294796 1273861 512 256 54900 115475 2024389 1459080 512 512 53228 125798 1712772 2327124 1024 4 18844 22383 613934 643652 1024 8 31187 37594 867003 480055 1024 16 36278 58487 1080275 552918 1024 32 41721 83171 1024121 829175 1024 64 52418 103120 1347311 1129123 1024 128 55222 107270 997019 1190465 1024 256 61137 134664 1532928 1751042 1024 512 63456 119988 1374474 1675884 2048 4 18901 20720 603403 638381 2048 8 26338 35302 1101018 706943 2048 16 41685 58931 1129094 991817 2048 32 50534 79909 981840 1112425 2048 64 57338 97990 1381950 1848567 2048 128 68333 133918 1244953 1241175 2048 256 73410 114178 1540849 1371798 2048 512 86286 144983 1472188 1409386 4096 4 17322 21922 660870 375230 4096 8 27800 35574 811258 949698 4096 16 49599 60281 1054315 768921 4096 32 45774 71891 1359940 1274867 4096 64 62946 94454 1343772 1293294 4096 128 76786 135877 1558574 1313666 4096 256 85534 128748 1596967 1413305 4096 512 78908 133768 1577755 1538752 8192 4 17624 19400 656461 560665 8192 8 31603 35930 857711 773993 8192 16 47992 58500 1262074 1115003 8192 32 60513 83010 1354729 1074520 8192 64 76301 113747 1603137 842794 8192 128 85204 129286 1638377 1038535 8192 256 85781 134125 1853395 1425726 8192 512 96156 144635 1880169 1342764 16384 4 20516 22411 733071 624723 16384 8 33922 38073 971316 880953 16384 16 49201 57867 1215611 1031610 16384 32 73169 81737 1345361 1256830 16384 64 84677 108965 1691522 1539835 16384 128 85688 116805 1711321 1497325 16384 256 100153 153602 1928004 1527785 16384 512 98120 137954 1845273 1652275 32768 4 20294 21967 646464 576436 32768 8 32689 37790 1105723 774435 32768 16 52628 59318 1221866 978061 32768 32 67325 87522 1738175 1195559 32768 64 84186 114118 1512631 1340909 32768 128 90462 106650 1637331 1456417 32768 256 91317 123935 1801821 1477221 32768 512 94813 139561 1730014 1369039 65536 4 20841 21868 806439 643474 65536 8