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: Wed Sep 30 12:21:21 2026 Auto Mode Machine = Linux oleg657-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-oleg657-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 2832 8453 621657 519412 64 8 3826 17528 955947 688639 64 16 3673 19312 1029254 913649 64 32 3492 51367 1304314 799377 64 64 4219 96531 1599680 1638743 128 4 7664 14149 564055 571865 128 8 6209 6899 805138 330828 128 16 11388 42639 1067750 395104 128 32 11763 75692 311445 1102844 128 64 12786 66668 1440082 1504659 128 128 7176 36136 1663139 1684006 256 4 4673 5660 562520 565185 256 8 6905 24629 300447 825443 256 16 20083 45511 654399 838988 256 32 16459 42553 1306564 951219 256 64 7384 79750 996229 1345868 256 128 11651 50975 557844 1375171 256 256 8927 33023 794889 2152625 512 4 7418 8867 516122 509509 512 8 7032 19338 844865 647260 512 16 6254 10821 811655 522018 512 32 12898 22866 236616 997991 512 64 21432 49440 1336492 1182661 512 128 28243 43888 1528669 978885 512 256 17171 37740 993834 410545 512 512 15438 49482 1630828 1902438 1024 4 4874 8997 648903 264130 1024 8 14630 23857 959596 516917 1024 16 14473 11087 382529 1094034 1024 32 31555 48048 1374474 1188159 1024 64 41256 96140 1414304 1262555 1024 128 32723 73442 974179 1357961 1024 256 37961 46362 1659694 932714 1024 512 35038 64435 1720874 1402298 2048 4 10212 6051 168463 204047 2048 8 11974 18879 215985 220075 2048 16 11367 18137 265278 1009772 2048 32 12164 25379 861594 383876 2048 64 35780 40427 869707 646014 2048 128 24228 73796 1675821 1357919 2048 256 35846 63729 1646273 1101018 2048 512 28114 81678 1748834 408464 4096 4 5233 6390 320778 269649 4096 8 9647 14769 560320 333902 4096 16 15043 23115 386196 577226 4096 32 22900 40343 910008 750448 4096 64 40388 33806 1195553 573105 4096 128 31715 43092 868204 706937 4096 256 33540 71946 1127154 1123762 4096 512 35285 81998 525606 365912 8192 4 5629 6403 403668 369440 8192 8 12031 19102 718976 571787 8192 16 13876 17389 442114 478089 8192 32 26490 29153 622449 522217 8192 64 31286 49589 672194 777074 8192 128 36227 43017 626730 410526 8192 256 53368 62158 677081 928495 8192 512 38975 52903 1272450 447137 16384 4 6376 7589 427166 326348 16384 8 11488 12075 582024 608412 16384 16 15340 22621 601953 554959 16384 32 31676 25573 781455 503211 16384 64 32372 37373 295452 440157 16384 128 37069 46699 687278 945405 16384 256 35463 51072 735433 558323 16384 512 36261 66127 1192346 588463 32768 4 7252 6410 232035 320200 32768 8 14126 12686 362634 345759 32768 16 13917 17391 760277 544733 32768 32 23212 33554 654562 341949 32768 64 24115 37608 1093912 696878 32768 128 44770 49261 1222551 562472 32768 256