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: Mon Aug 24 01:25:42 2026 Auto Mode Machine = Linux oleg138-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-oleg138-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 2282 4864 473593 385237 64 8 5764 20446 1143223 780776 64 16 6535 30175 233664 552557 64 32 7130 55032 1083249 842003 64 64 4556 73407 1143223 1828508 128 4 5165 6498 630273 368779 128 8 5894 7374 826202 684954 128 16 4803 24507 51327 618653 128 32 8386 26760 627328 1111981 128 64 14777 127347 1377278 609522 128 128 5791 43084 1598754 2066432 256 4 3470 8977 474937 277108 256 8 7299 14879 292269 561343 256 16 8116 20542 146689 664935 256 32 10123 20565 1128110 883152 256 64 18211 37808 1561112 580461 256 128 11929 86252 1354356 102860 256 256 18787 30970 1415041 1704877 512 4 6183 7324 224167 270164 512 8 3094 17687 774480 418628 512 16 9538 10660 1286067 447970 512 32 8642 34160 1168504 492790 512 64 27985 20058 932550 510478 512 128 8533 74428 1138158 1261144 512 256 17322 97916 681782 1372364 512 512 13102 65692 1590957 1803387 1024 4 10420 13267 567306 212540 1024 8 12862 15015 788964 141394 1024 16 21858 15313 1071116 391740 1024 32 27837 45694 715612 377022 1024 64 28666 58470 806293 269044 1024 128 36391 31870 860575 350672 1024 256 18489 88719 913471 521942 1024 512 19239 70722 817185 338085 2048 4 5955 5746 273027 194550 2048 8 6862 14268 339633 368480 2048 16 16873 18162 709395 461978 2048 32 22009 37378 428194 1139731 2048 64 17439 33354 1117927 140738 2048 128 26610 51681 843158 713816 2048 256 34972 46033 464501 410024 2048 512 28438 26059 1570714 175041 4096 4 4537 4820 208734 157126 4096 8 6915 8834 449078 426090 4096 16 13340 12668 722517 305258 4096 32 15998 25188 469667 477552 4096 64 14489 22633 454652 623819 4096 128 18042 35649 548407 1199727 4096 256 28774 57604 499330 517110 4096 512 16788 26275 867985 615285 8192 4 5425 8521 411470 183438 8192 8 10105 15925 259190 298599 8192 16 14624 19298 678646 563877 8192 32 23253 33308 747848 373500 8192 64 26215 28905 687087 391846 8192 128 26964 36748 384729 286833 8192 256 33975 46232 673300 257927 8192 512 31110 64324 757894 592728 16384 4 5679 8301 383511 227098 16384 8 12422 12363 497254 312772 16384 16 13997 16094 578671 315519 16384 32 23865 24617 407014 349488 16384 64 25146 21664 574876 417202 16384 128 26351 35292 974263 721571 16384 256 26662 66019 891212 573628 16384 512 40443 55219 1014117 695036 32768 4 5781 9013 140635 161660 32768 8 8114 9430 236605 179998 32768 16