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 Sep 2 08:53:15 2026 Auto Mode Machine = Linux oleg158-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-oleg158-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 7836 15514 603489 639427 64 8 11363 27291 1452528 799377 64 16 6055 38552 1679761 1066042 64 32 17448 78932 681644 1484662 64 64 15219 93963 1330167 2892445 128 4 11432 18475 800337 539674 128 8 12529 28169 1133103 703810 128 16 17623 44458 1705404 1658003 128 32 22852 78103 1278855 948860 128 64 21451 78526 1504659 2286447 128 128 16460 105708 1755594 1684006 256 4 13452 18339 742146 735537 256 8 21636 35569 1243036 873098 256 16 18148 49534 1235882 1098113 256 32 36607 88063 1369908 1158540 256 64 29509 102039 1752173 1455317 256 128 42370 98347 1740810 1718521 256 256 39839 126922 2223962 2975955 512 4 16234 18588 645703 635198 512 8 22735 30457 949875 835010 512 16 35949 56493 1209982 1426135 512 32 44983 79578 1358474 1889050 512 64 44849 106862 1803387 1077618 512 128 63689 121034 1910902 2143612 512 256 62347 179453 1619757 1600443 512 512 42603 164939 1575781 2830083 1024 4 15780 18971 623289 721139 1024 8 25873 33123 1335165 1040496 1024 16 43050 61520 1324868 1744641 1024 32 57047 81846 2370545 1693061 1024 64 77270 122780 2183727 1238168 1024 128 69864 118394 1928757 2155236 1024 256 69901 136042 1888889 1551198 1024 512 86823 139683 1865101 1692394 2048 4 16709 17198 728342 598151 2048 8 24154 33941 909776 868564 2048 16 44739 50272 1510236 1271301 2048 32 56302 80878 1301149 1655474 2048 64 81253 107011 2470639 2056087 2048 128 73841 122092 1841434 1948800 2048 256 73964 128684 1713598 1462911 2048 512 74987 140148 1982533 2102899 4096 4 16462 18002 831841 655775 4096 8 28296 31055 1024269 1041974 4096 16 45561 50075 1287286 1217928 4096 32 65498 83088 1797281 1748087 4096 64 72898 107444 1510875 642506 4096 128 74191 113512 1491074 1723189 4096 256 90166 150263 2365133 1492110 4096 512 101449 125000 2058256 1590168 8192 4 16784 18775 987240 824710 8192 8 30438 32431 1054568 862404 8192 16 43898 51432 1567591 1238777 8192 32 64155 75907 1586116 1409294 8192 64 75298 100427 1552645 1365551 8192 128 86932 120825 1818379 1674875 8192 256 84937 131425 2407188 1736760 8192 512 106769 132736 1872893 2241953 16384 4 16841 18619 733886 663585 16384 8 30081 31347 1084967 1169119 16384 16 46256 51060 1224513 1240472 16384 32 62140 72883 1662508 1515353 16384 64 79056 92700 1624773 1497750 16384 128 91223 118384 2407931 1835563 16384 256 95543 140471 2210496 1877796 16384 512 117300 134338 2198052 1842750 32768 4 16989 17534 790693 824850 32768 8 27876 31126 1067679 1115994 32768 16 46079 52805 1398488 1280803 32768 32 62532 76730 1486697 1446972 32768 64 86345 98087 2032645 1693102 32768 128 90273 117414 2012790 1469624 32768 256 94293 130284 2045441 1748480 32768 512 90381 135363 2169353 1796568 65536 4