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 May 29 16:28:57 2026 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 4003 11674 477808 432398 64 8 10123 25116 789967 538156 64 16 8500 38859 1828508 969761 64 32 6144 61783 2133730 1392258 64 64 5634 80907 1526887 1780008 128 4 4155 15541 609522 556454 128 8 10349 32396 969421 673778 128 16 8559 45405 976473 883293 128 32 8036 66843 1332828 1196221 128 64 10670 99460 1492113 789741 128 128 7172 95804 1663139 1254941 256 4 9048 14345 684432 588414 256 8 19177 28988 913973 1019886 256 16 20808 49354 1032636 996229 256 32 30728 62653 1642294 1981783 256 64 16200 84071 1334162 433169 256 128 45681 92485 1347557 1802167 256 256 22172 121206 1639786 2366082 512 4 12039 17429 683518 793951 512 8 21002 27621 1184618 748563 512 16 30565 56668 1204552 941133 512 32 29681 88458 1741948 1391032 512 64 53737 101244 1344020 1368865 512 128 35424 142106 1514652 1528669 512 256 38194 120443 1510391 1783912 512 512 38752 52583 1795846 1917728 1024 4 14939 17135 629040 569186 1024 8 25520 29677 864734 869284 1024 16 32096 51036 1167489 906148 1024 32 46562 72882 1194770 1261072 1024 64 27616 104896 1625154 1257748 1024 128 58088 132230 1532928 1349428 1024 256 54243 127014 1458489 1620249 1024 512 46826 142322 1914144 1698417 2048 4 15811 17370 712573 651403 2048 8 24083 29291 909006 453586 2048 16 36739 48927 1085436 1129094 2048 32 45409 77808 892757 1358993 2048 64 54972 103376 1665101 1418228 2048 128 75938 124506 1711208 1503627 2048 256 80706 132309 1669307 1676148 2048 512 80996 159739 2060526 1905146 4096 4 15635 17454 821657 672143 4096 8 27579 31186 1130566 1056195 4096 16 42948 51285 1408093 1143205 4096 32 63492 78779 1461394 1433710 4096 64 73580 105916 1779964 1373641 4096 128 76257 110356 1848330 1426685 4096 256 93052 125625 1991221 1961663 4096 512 78674 132371 1771521 1626603 8192 4 17256 17366 735112 568335 8192 8 27575 31530 1113486 887348 8192 16 42484 44507 1353608 1309001 8192 32 51843 68531 1443758 1364195 8192 64 65832 91626 1798486 1474995 8192 128 74996 117858 1740455 1674630 8192 256 78200 125227 2027744 1706230 8192 512 97111 125800 1936653 1801976 16384 4 16086 17158 808124 645496 16384 8 26398 30864 949573 769312 16384 16 41646 44992 1196686 1040450 16384 32 50045 63463 1233547 1071067 16384 64 71581 99981 1929574 1288865 16384 128 84645 120783 1980684 1457656 16384 256 90697 141524 1968768 1657976 16384 512 97794 135476 2093012 1842107 32768 4