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 Aug 24 17:20:18 2026 Auto Mode Machine = Linux oleg304-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-oleg304-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 6314 4518 424198 538156 64 8 4163 18238 852702 821391 64 16 2996 37937 998622 789967 64 32 4215 69945 1304314 1163036 64 64 2141 12023 1279447 1722886 128 4 4547 6075 673778 606767 128 8 9326 14883 921183 847059 128 16 4186 26694 1074159 1048974 128 32 7457 26550 1316487 992724 128 64 4828 38727 262296 1254941 128 128 4284 54817 1579934 718889 256 4 3641 4886 116675 160913 256 8 3433 11027 777619 345054 256 16 12969 39390 1117543 299442 256 32 10164 49259 952062 924200 256 64 9156 77198 1495866 1237306 256 128 22798 126355 1561112 256519 256 256 21232 150135 1260547 1619994 512 4 6600 12631 613250 174850 512 8 5072 17047 760762 201986 512 16 16859 53377 270470 984720 512 32 20903 55006 1319250 999850 512 64 19205 67922 1455126 904658 512 128 24575 48047 1199171 839252 512 256 17723 76371 1718254 713021 512 512 26594 60185 1620980 1190529 1024 4 7917 9525 646461 208515 1024 8 11471 14979 934337 244451 1024 16 20909 22222 332793 1025099 1024 32 22516 55181 860575 195050 1024 64 20165 67390 451920 692423 1024 128 19661 41341 863343 455322 1024 256 28009 54315 1071116 1141426 1024 512 23185 112812 864038 628672 2048 4 5324 7074 367549 131636 2048 8 12720 11543 519506 841424 2048 16 10208 16872 103838 228396 2048 32 16150 27564 1393156 380661 2048 64 27023 28140 585153 752657 2048 128 16448 21777 844900 376045 2048 256 47313 60238 1681397 950865 2048 512 55970 60672 1131474 347126 4096 4 7838 6100 343337 325519 4096 8 22673 13631 332493 162998 4096 16 26014 15179 456683 534668 4096 32 22205 31980 750612 644943 4096 64 20821 45987 427468 1208929 4096 128 25709 1868 668404 782261 4096 256 33768 35306 1748265 661583 4096 512 27752 44045 808395 628612 8192 4 6209 8855 213979 209519 8192 8 12556 11677 427159 438520 8192 16 17279 21944 540512 360165 8192 32 28944 31955 373980 757593 8192 64 25953 47224 1016897 729214 8192 128 25450 54992 777074 446625 8192 256 32123 53767 1011121 772757 8192 512 43079 45900 771508 549019 16384 4 6682 7490 307963 278951 16384 8 11430 14560 547335 504604 16384 16 20143 22524 755966 552190 16384 32 21438 29126 717563 323348 16384 64 24907 27350 515170 641477 16384 128 25173 41701 368311 607987 16384 256 38457 66810 395012 405343 16384 512 35132 55619 701879 1077752 32768 4 7102 7228 323621 260970 32768 8 11955 13683 336583 290526 32768 16 17136 23764 764140 529096 32768 32 21912 26279 1109283 733853 32768 64 28890 53012 654259 487084 32768 128 34720 47571 906746 657609