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 Aug 11 16:42:57 2026 Auto Mode Machine = Linux oleg128-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-oleg128-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 1810 1880 610350 272300 64 8 4792 10271 821391 688639 64 16 3200 18156 926260 735831 64 32 2944 50507 1101022 983980 64 64 5135 43158 1210227 273409 128 4 3714 6273 306992 245729 128 8 4306 7135 579270 681476 128 16 6997 20917 761728 907174 128 32 3521 29297 1076312 177254 128 64 6233 36497 1254941 1306873 128 128 4381 38763 341345 1727352 256 4 3262 4115 551540 346390 256 8 7436 18114 399337 727070 256 16 11092 31272 910872 563701 256 32 9087 41912 1369908 1090308 256 64 8183 45977 448362 1126926 256 128 8489 59257 1123389 242445 256 256 11526 95734 1339154 261009 512 4 4558 8570 323230 438368 512 8 9659 15431 425260 474602 512 16 13425 11589 117813 469723 512 32 16000 22736 1036027 937845 512 64 10259 17844 1155302 958781 512 128 13608 27684 1264113 522018 512 256 15812 33516 1496706 1492545 512 512 24637 105218 1455126 280247 1024 4 7315 3142 554131 442560 1024 8 5324 8657 337394 159079 1024 16 8789 12589 81534 1116792 1024 32 19333 30507 1126458 169957 1024 64 16430 48784 1055584 365193 1024 128 28222 52040 752868 454118 1024 256 28722 69607 1182272 1094034 1024 512 25247 88965 1848247 825192 2048 4 9889 8258 491476 230838 2048 8 14842 18848 266496 754309 2048 16 20209 17667 583959 959682 2048 32 27388 46048 1034333 1082563 2048 64 31848 54540 769307 928359 2048 128 14842 38703 617234 601670 2048 256 21870 37843 1484143 845981 2048 512 38468 64650 255905 760790 4096 4 5606 5082 193901 198853 4096 8 8250 8208 395869 656727 4096 16 18863 32077 586647 819853 4096 32 33697 21677 1120684 672143 4096 64 22265 32770 1483477 762878 4096 128 24106 51724 1022014 850833 4096 256 69733 90784 970899 691181 4096 512 33568 74201 1026779 1494836 8192 4 4668 7099 359867 528036 8192 8 8211 2354 327261 340580 8192 16 17317 21477 850050 431406 8192 32 21204 22053 410418 414973 8192 64 20818 21257 871857 464742 8192 128 28329 40660 1191895 386052 8192 256 34481 61902 754250 608569 8192 512 30859 54518 640755 1091103 16384 4 5948 5971 271694 339226 16384 8 10343 13828 461118 455669 16384 16 15458 15276 693472 559505 16384 32 23512 24670 646693 415995 16384 64 33794 35730 839857 856138 16384 128 28380 42038 714021 885106 16384 256 29504 39129 798044 778816 16384 512 39350 51558 664284 336946 32768 4 6760 7442 209566 346139 32768 8 8923 12213 331824 224267 32768 16 12653 20133 556039 1057435 32768 32 16357 20694 607500 526318 32768 64 26246 23207 1050428 555965 32768 128 25184 34688 388471 799668 32768 256 24622 42142