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: Fri Aug 21 14:58:08 2026 Auto Mode Machine = Linux oleg439-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-oleg439-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 3186 4831 126215 463774 64 8 1509 21276 829001 789967 64 16 3947 15321 942521 771797 64 32 1217 41477 866463 913649 64 64 2379 27948 1017549 1828508 128 4 5026 9345 561694 369795 128 8 9834 22295 836500 258135 128 16 7154 10326 908709 859260 128 32 4447 20097 1319723 1085013 128 64 5477 88158 877518 1175271 128 128 8486 37549 761728 2098744 256 4 3104 10086 629094 520524 256 8 5506 15584 809878 560172 256 16 13805 17326 1099237 852984 256 32 13187 46911 1272498 1048775 256 64 22072 68318 1422540 1312954 256 128 11653 102029 482189 1158540 256 256 5523 140729 1332507 1629830 512 4 8127 7116 104981 108454 512 8 14346 5648 435789 615535 512 16 6383 10752 1034530 785241 512 32 22701 29550 1002183 870905 512 64 19659 22151 485767 807687 512 128 33435 43485 694572 1163439 512 256 23368 92203 775879 828566 512 512 30793 110559 1391032 942786 1024 4 3322 7152 88895 189491 1024 8 9648 6018 477175 266390 1024 16 6225 14410 506912 550297 1024 32 23328 15513 561081 1054547 1024 64 21815 51924 505956 171265 1024 128 31034 31193 1390944 1116502 1024 256 18237 26006 608800 1140214 1024 512 40827 33081 226649 114119 2048 4 5699 5725 358095 185388 2048 8 6636 8559 498406 316541 2048 16 9653 14871 1127760 715362 2048 32 14780 20752 568425 230473 2048 64 19547 23902 233100 851854 2048 128 28434 22561 328100 541650 2048 256 28715 36505 1412398 1267362 2048 512 28390 56219 946465 741546 4096 4 6144 5683 287496 98527 4096 8 1322 10737 633948 354722 4096 16 18968 23062 433486 626778 4096 32 13128 22550 429756 712833 4096 64 24969 26956 550604 803593 4096 128 25665 50244 603865 742983 4096 256 28412 81847 758801 480464 4096 512 33980 54721 691181 224058 8192 4 6234 7503 391676 262900 8192 8 11928 9790 381822 331741 8192 16 16576 19599 430137 460328 8192 32 17786 22692 504868 619900 8192 64 24636 21490 891909 337954 8192 128 22246 39996 475200 440572 8192 256 29841 50288 901598 683520 8192 512 28232 38723 434862 427536 16384 4 6709 6985 273966 225386 16384 8 10087 12725 470533 470288 16384 16 16336 20936 702510 471088 16384 32 17608 20670 331680 262863 16384 64 24214 28646 515479 517922 16384 128 23356 40719 1096882 367058 16384 256 28779 29842 884001 525230 16384 512 26201 42376 511633 447894 32768 4 5928 5964 357573 188771 32768 8 11024 11984 364944 380425 32768 16