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: Thu Jun 25 00:23:06 2026 Auto Mode Machine = Linux oleg445-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-oleg445-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 4676 18778 639427 688639 64 8 10562 30770 821391 1163036 64 16 14353 43068 1049372 666414 64 32 10207 75470 1124074 1279447 64 64 15897 88656 1599680 695778 128 4 10759 15746 830034 624409 128 8 15298 28737 723735 699227 128 16 15171 44583 1123617 942199 128 32 15592 76829 1852520 1266785 128 64 21647 84883 1243315 1997245 128 128 18071 101915 1579934 1997245 256 4 10819 17341 853662 562520 256 8 18181 27550 1048775 847597 256 16 16451 49488 934659 1137672 256 32 33108 83275 1103757 1123389 256 64 25184 107796 1347557 958864 256 128 31364 106534 1540948 1558845 256 256 40834 154789 2065659 2285501 512 4 14691 17072 1099128 533297 512 8 21310 29230 935801 920558 512 16 29398 53855 1239310 1556366 512 32 45952 76957 1625889 1528669 512 64 45636 113757 1874212 1216149 512 128 54830 127395 1296159 1401929 512 256 54830 128547 1089647 1630828 512 512 42734 145870 2497638 2452009 1024 4 14897 17101 907872 596373 1024 8 23723 31816 916004 772225 1024 16 34122 46351 1120288 1311117 1024 32 39492 69456 1227552 1039489 1024 64 53592 104340 1673273 1390944 1024 128 60721 122545 1961346 1871603 1024 256 71264 123252 1582636 1422266 1024 512 76969 121241 1906496 1780809 2048 4 14439 16749 613356 599528 2048 8 23558 30679 897420 819509 2048 16 36510 49514 1295263 927457 2048 32 55267 77062 1421043 1192912 2048 64 62997 88765 1416357 1200582 2048 128 76052 129644 1477506 1447382 2048 256 71618 109847 1745990 1488515 2048 512 81753 123842 2443928 1749190 4096 4 16019 16865 674016 742566 4096 8 27419 31422 998086 1018923 4096 16 46599 49014 1446749 1065034 4096 32 63296 81621 1725439 1677917 4096 64 88527 104717 1984550 1739239 4096 128 90295 132836 1442740 1583864 4096 256 87661 131425 2013626 1203678 4096 512 95404 145931 1889391 1887523 8192 4 16608 16908 752038 608257 8192 8 26009 29622 971305 926393 8192 16 44225 50117 1244971 1160652 8192 32 62744 73649 1352915 1149893 8192 64 70131 106341 1713804 1437477 8192 128 82215 121443 1574776 1642999 8192 256 83711 122541 1716630 1618009 8192 512 87992 127701 2058356 1889267 16384 4 15856 16333 818997 670814 16384 8 27584 30147 1103310 782835 16384 16 42571 47744 1127976 890243 16384 32 59827 73022 1353816 1325688 16384 64 71889 97171 1608797 1296818 16384 128 80736 109392 1761549 1532623 16384 256 83691 110982 1642835 1084317 16384 512 85109 122811 1892378 1488665 32768 4 16185 17682 890553 685047 32768 8 25940 29015 1022240 1094635 32768 16 42439 46147 1442886 1044767 32768 32 57093 68939 1605336 1406833 32768 64 67611 93966 1833697 1438717 32768 128 79579 112839 1879563 1640125 32768 256 84066 115069 1842251 1309144 32768 512 92869 132976 1579017 1436056 65536 4