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 Jun 11 23:38:59 2026 Auto Mode Machine = Linux oleg160-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-oleg160-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 2054 10294 1083249 192730 64 8 5087 28815 789967 688639 64 16 9336 49004 1168097 1421755 64 32 5664 57250 2067979 1124074 64 64 7422 90632 1892980 315136 128 4 2693 4709 415597 646983 128 8 6513 18135 843068 1254941 128 16 7080 56615 1165070 413994 128 32 8978 51947 1254941 1015251 128 64 9028 49025 2132084 1231904 128 128 9927 50435 1543594 2175277 256 4 5174 5176 606700 566377 256 8 6926 10563 773697 831194 256 16 12534 27458 792543 605332 256 32 15587 25034 1027695 677095 256 64 12112 70758 1274008 1132871 256 128 7086 37969 1212164 1629830 256 256 12216 69131 1642294 1868008 512 4 8658 7268 560144 962649 512 8 9155 16446 840895 744411 512 16 20680 34094 558396 176968 512 32 14234 26636 1210664 210438 512 64 18286 36261 1276891 1261144 512 128 19904 57213 1496706 450318 512 256 18060 60086 279627 1524329 512 512 19009 75672 1729323 2235086 1024 4 5490 6166 417116 179234 1024 8 6531 15996 307314 345704 1024 16 15239 14664 944612 954478 1024 32 16234 19657 300814 835303 1024 64 13357 32098 878171 722717 1024 128 12060 26594 943781 1345623 1024 256 13793 21063 689533 1007781 1024 512 38631 110345 1492963 2156318 2048 4 7228 4078 286275 310590 2048 8 9520 12190 891552 257841 2048 16 13408 28328 642583 951708 2048 32 23644 37662 357351 1110699 2048 64 33234 57462 1399968 658949 2048 128 18168 44143 1561009 1379287 2048 256 38554 82162 2199836 832857 2048 512 47164 70750 1805819 2081497 4096 4 5956 6008 237669 231807 4096 8 8874 9824 473864 368977 4096 16 17131 26006 549864 529543 4096 32 31363 27909 396170 624772 4096 64 36493 36334 918768 682667 4096 128 26294 37001 1500319 806952 4096 256 19578 23770 184787 720003 4096 512 24113 53102 571256 887903 8192 4 3230 3759 190982 166412 8192 8 1723 6590 893230 276224 8192 16 15381 17917 751134 434978 8192 32 12833 22015 358729 310644 8192 64 30827 56674 1605910 748548 8192 128 32115 49939 578604 433212 8192 256 26890 24562 498235 509676 8192 512 22747 33486 805662 607805 16384 4 3275 5741 260788 300860 16384 8 8331 7725 280842 335222 16384 16 6565 9610 204651 501130 16384 32 13887 24195 354976 391147 16384 64 19896 32417 883944 557200 16384 128 29953 34805 709085 667349 16384 256 26438 31461 701156 575647 16384 512 35016 42361 572486 384890 32768 4 3852 3925 226686 139109 32768 8