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: Sat Jul 18 18:23:10 2026 Auto Mode Machine = Linux oleg402-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-oleg402-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 5948 16028 679917 633392 64 8 7326 22291 1049372 621657 64 16 9861 44137 1049372 789967 64 32 13674 60666 1304314 512471 64 64 9323 79399 1304314 1768283 128 4 8586 17062 684081 196958 128 8 12138 31348 976473 677178 128 16 14369 40802 1121270 927549 128 32 13758 48302 934004 947186 128 64 15916 86664 1220700 1024942 128 128 13304 109951 1598754 1939522 256 4 7179 15698 748875 396243 256 8 19254 28539 856386 629094 256 16 20338 44544 1195962 941213 256 32 13822 61227 1354356 1084800 256 64 29506 84935 1224606 1117543 256 128 37994 113830 1369908 1168627 256 256 31008 119016 1752173 2049885 512 4 12398 17081 626672 649020 512 8 23185 29351 1150351 1020276 512 16 30242 49868 1245780 1089647 512 32 35092 71151 1506154 1073309 512 64 42809 93720 770037 1115688 512 128 47517 101364 1429934 1418599 512 256 58167 140470 1766304 1718254 512 512 60277 156672 2039772 3012719 1024 4 14002 17312 832550 687656 1024 8 26232 30012 1007781 895007 1024 16 40310 47973 1194770 1186518 1024 32 47104 75936 2124322 1111589 1024 64 63237 95898 1475525 1226150 1024 128 55721 136171 1544504 1456510 1024 256 61730 124861 1620249 1347311 1024 512 76401 129355 1803239 1957770 2048 4 16289 16635 660469 737472 2048 8 25701 31245 873333 840025 2048 16 40459 55549 1115459 1308682 2048 32 56303 71057 1425997 1120405 2048 64 71606 106020 2034177 1306095 2048 128 73258 107281 1599971 1818820 2048 256 81041 137347 1865023 1523901 2048 512 83694 155668 2172024 1877250 4096 4 16418 18210 761053 740932 4096 8 26855 31345 944425 890249 4096 16 42236 49583 1378270 1141306 4096 32 55336 70661 1315375 1343457 4096 64 70069 96437 1650830 1310659 4096 128 81417 118247 1885037 1326445 4096 256 85260 119152 1714419 1325218 4096 512 80604 139159 1925604 1504260 8192 4 15767 16687 690428 626250 8192 8 25834 30004 1015124 959372 8192 16 41813 52447 1337901 1171615 8192 32 53808 67506 1528675 1521028 8192 64 69083 93778 1694032 1489187 8192 128 71918 102670 1806714 1357888 8192 256 86844 109973 1623514 1584872 8192 512 89044 123215 1881920 1506952 16384 4 15831 16354 781117 685010 16384 8 25769 28868 958914 954002 16384 16 40795 44643 1603280 1304251 16384 32 53601 72533 1286934 1314606 16384 64 66713 93882 1622318 1397367 16384 128 80854 109462 1747439 1581765 16384 256 93097 116116 1920729 1545654 16384 512 92417 123296 2009352 1652474 32768 4 15575 16465 724633 601423 32768 8 26431 29095 989553 958632 32768 16 39809 47347 1175457 1024610 32768 32 56077 69200 1334918 1269435 32768 64 67968 87479 1658892 1373060 32768 128 78665 108560 1646373 1403701 32768 256 81378 118704 1813781 1597889 32768 512 90167 127245 1808292 1677991 65536 4