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: Thu Jan 1 21:07:43 2026 Auto Mode Machine = Linux oleg411-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-oleg411-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 2369 10601 267684 125272 64 8 3929 19248 400168 383585 64 16 6531 30315 566551 555990 64 32 4631 52155 955947 799377 64 64 4794 57718 1255511 811459 128 4 2351 9345 143172 283787 128 8 5731 12846 450846 422464 128 16 3993 47214 636249 549056 128 32 4268 53532 908709 876086 128 64 12993 87669 493989 1024942 128 128 7519 55652 901083 1579934 256 4 8725 12444 191746 377041 256 8 15100 14834 416856 259119 256 16 13898 31387 775373 821025 256 32 10463 43352 677095 188382 256 64 9198 28406 396975 670332 256 128 9869 42751 1274008 1103757 256 256 12500 37762 1197295 725596 512 4 7246 3204 87431 131854 512 8 10864 16494 371035 140461 512 16 15291 23158 572081 425682 512 32 8430 47019 227661 948197 512 64 30262 51261 1093531 836636 512 128 13796 52588 906185 1103647 512 256 17747 67814 1316016 991998 512 512 19081 58174 380975 1242896 1024 4 10064 13058 165721 187858 1024 8 12319 20454 238082 232892 1024 16 15322 43045 430797 764663 1024 32 24494 26800 1000037 444254 1024 64 30208 40609 397836 264195 1024 128 23405 59978 637159 309551 1024 256 20148 45663 115184 1264413 1024 512 42267 85168 485756 186861 2048 4 7009 6015 98070 67497 2048 8 18400 16546 254563 158124 2048 16 20765 29667 507055 332353 2048 32 26685 66381 240851 299240 2048 64 25299 51807 1135362 772559 2048 128 38051 48794 472212 705028 2048 256 22138 54594 911031 271620 2048 512 31043 41327 1515833 983189 4096 4 7471 7436 136683 129879 4096 8 10507 7604 201099 204391 4096 16 14712 26460 242264 158207 4096 32 13998 30344 585129 411663 4096 64 21881 45652 595865 451949 4096 128 47217 74252 1055157 702917 4096 256 43871 63952 760783 301550 4096 512 45487 120847 437884 1623529 8192 4 8088 9368 125424 146839 8192 8 22323 18819 353772 209824 8192 16 19023 28310 580628 622923 8192 32 25882 32913 586275 434840 8192 64 25991 58254 676242 591350 8192 128 31464 43038 1144607 809001 8192 256 3341 49529 603948 520595 8192 512 39382 58598 787926 737146 16384 4 6497 7622 142539 79882 16384 8 13700 12348 259866 298633 16384 16 20669 22795 542140 389964 16384 32 27283 44732 413497 353590 16384 64 36592 42670 792769 776896 16384 128 36485 45936 1242895 691365 16384 256 41219 60454 880817 616241 16384 512 47145 48437 632759 1208534 32768 4 7844 7543 136512 116688 32768 8 9803 14312 176738 215053 32768 16 16598 28182 429805 264398 32768 32 27734 32659 724778 477819 32768 64 33774 37056 463827 380214 32768 128 29094 51261 676074 747634 32768 256 32538 36860 650596 500710 32768 512 30008 33613 376396 498227 65536 4