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: Mon Sep 7 12:06:20 2026 Auto Mode Machine = Linux oleg607-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-oleg607-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 3727 10588 634890 471099 64 8 2052 10195 789967 148159 64 16 3469 8499 818885 983980 64 32 2969 24071 1255511 1083249 64 64 5509 75641 383585 1679761 128 4 2867 10689 677178 556454 128 8 7109 20655 618653 790905 128 16 7006 32373 1206978 921183 128 32 9436 40936 901083 1030846 128 64 3267 53378 1009524 1243315 128 128 4483 32728 1487977 1939522 256 4 6033 9367 455592 392620 256 8 7065 12907 880256 841618 256 16 8298 23647 750445 894929 256 32 18124 41290 787312 1019886 256 64 17877 51707 1437779 1319408 256 128 9932 105519 1610276 1694118 256 256 17348 84654 1752173 1552085 512 4 7798 12685 372322 309533 512 8 9683 23232 234548 677267 512 16 15819 19226 201891 421421 512 32 22947 51690 1193838 1078159 512 64 12863 38200 1312798 1273106 512 128 21208 51984 1410215 1402845 512 256 23504 74159 1797349 1496706 512 512 25047 88429 560144 975328 1024 4 8732 8233 485537 624376 1024 8 12812 8113 910181 461685 1024 16 13507 10070 1220575 514317 1024 32 28398 40180 1352828 831100 1024 64 30814 68647 1404591 1189476 1024 128 39389 81186 1001903 525133 1024 256 26999 40725 512476 1370527 1024 512 31419 62937 1060013 965854 2048 4 7808 12547 467687 388161 2048 8 19212 22395 878244 207182 2048 16 12280 23247 633438 451298 2048 32 26646 48568 1018874 1220541 2048 64 30775 62328 1413328 987484 2048 128 42588 57707 513696 915887 2048 256 51002 62825 811381 1548069 2048 512 36144 73629 1137768 1315294 4096 4 6629 9008 266996 363704 4096 8 8682 10464 678488 255885 4096 16 15477 17971 406828 583143 4096 32 25073 33848 657381 703781 4096 64 35939 53559 419801 753476 4096 128 29197 41714 1823609 1055935 4096 256 32057 73998 661914 1524280 4096 512 31921 43948 1369917 522187 8192 4 6957 7211 175315 247575 8192 8 11080 11996 573227 361743 8192 16 11729 19166 251226 466091 8192 32 26643 30610 691999 488169 8192 64 19552 32547 907695 786177 8192 128 26057 45295 807157 825463 8192 256 46748 65661 1014375 1278987 8192 512 32648 47390 631220 938693 16384 4 6374 6302 360150 321619 16384 8 9583 10199 357198 295928 16384 16 12750 16249 632125 455075 16384 32 22468 23614 476418 591711 16384 64 30598 31922 942798 632317 16384 128 24111 38364 829186 676773 16384 256 28305 49968 939396 709876 16384 512 34332 44136 756699 622043 32768 4 5841 8276 447675 466754 32768 8 19249 11245 309146 264663 32768 16 18401 22278 767383 668244 32768 32 16211 20746 1036861 944326 32768 64 16570 24669 655279 595260 32768 128 34606 63159 1309618 529242 32768 256 42897 50954 520930 1085145 32768 512 32413 45479 490216 717338 65536 4