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: Tue Sep 1 19:52:01 2026 Auto Mode Machine = Linux oleg245-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-oleg245-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 1121 5804 577521 45872 64 8 3755 14038 500060 548044 64 16 2373 24363 955947 610350 64 32 2130 16385 1087638 886494 64 64 3828 62183 1304314 374488 128 4 1660 7362 557032 402510 128 8 2489 5149 790905 499970 128 16 4499 12212 650117 700139 128 32 7714 19116 1085013 895074 128 64 7384 38392 1040839 1209698 128 128 7596 47583 1185654 1967960 256 4 3497 3769 585845 266648 256 8 1881 7273 369897 705107 256 16 8100 25762 952062 126668 256 32 9789 57722 417018 358534 256 64 4393 33675 1327564 1027695 256 128 13218 38538 1190657 390195 256 256 10247 51674 1506359 741633 512 4 3431 5148 486648 376236 512 8 10286 17635 510478 86943 512 16 6353 15445 318390 816594 512 32 8393 19553 573916 824431 512 64 16175 59013 932550 191623 512 128 24242 39252 1289930 1182010 512 256 8791 41561 557671 1484293 512 512 9041 38337 1575781 1829505 1024 4 7305 7181 608800 165453 1024 8 12612 8064 145351 222608 1024 16 13542 16761 1000037 174034 1024 32 18810 31842 1041758 654341 1024 64 43882 63163 709700 1130014 1024 128 23326 41262 1577984 897438 1024 256 39907 97504 1568189 1398645 1024 512 50882 83075 2019445 1398645 2048 4 6088 11874 221237 115930 2048 8 14442 19221 501344 263407 2048 16 19247 14873 189896 316880 2048 32 19205 17330 1229274 278443 2048 64 16812 77055 452702 429522 2048 128 34145 56438 1188621 645480 2048 256 24510 34535 452415 424030 2048 512 16092 32077 1860176 1271301 4096 4 5036 7610 292947 255281 4096 8 11701 6402 293157 481825 4096 16 16753 25441 210440 378871 4096 32 17320 31397 654525 406760 4096 64 22688 33231 642314 939879 4096 128 26521 26609 605931 578859 4096 256 24147 33039 1456562 328733 4096 512 21494 51704 256880 453045 8192 4 2005 5218 162278 154706 8192 8 9676 8768 236906 308596 8192 16 6887 12879 541295 847242 8192 32 12928 43199 615393 517467 8192 64 14830 16663 877266 585895 8192 128 28575 58282 946163 660271 8192 256 50584 35117 794724 348328 8192 512 37226 49386 923877 833108 16384 4 5406 5062 350812 411275 16384 8 9464 8782 284035 272078 16384 16 14593 14276 522582 426511 16384 32 24130 27393 391054 266039 16384 64 33074 28953 569837 285297 16384 128 17988 39289 916946 855211 16384 256 35726 33277 399678 429631 16384 512 54423 47225 897111 1035652 32768 4 5280 5661 245712 146421 32768 8 8207 9776 385039 430122 32768 16 11401 17606