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 21:33:51 2026 Auto Mode Machine = Linux oleg355-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-oleg355-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 1446 7655 515423 451299 64 8 1179 9424 645579 524487 64 16 2387 10886 413101 760859 64 32 5520 40324 1204796 913649 64 64 3847 52802 913649 542506 128 4 3674 3523 680612 452366 128 8 5296 10680 739689 508012 128 16 6187 24069 667081 947186 128 32 3572 16358 486822 433727 128 64 3252 66151 1196221 1196221 128 128 3532 25723 1278855 1543594 256 4 2353 2709 501091 46418 256 8 8124 3423 514045 618227 256 16 3932 9491 59329 828628 256 32 3879 16864 1213534 595264 256 64 3636 24698 426628 750970 256 128 10316 17206 489665 1479379 256 256 5631 44459 69756 1743637 512 4 8496 8599 409293 486317 512 8 5699 6226 725303 687237 512 16 5414 14138 425260 188362 512 32 8129 16976 495633 568899 512 64 24460 54713 1210664 254085 512 128 21773 16838 795127 1001715 512 256 11300 34834 525724 536092 512 512 14885 48420 1388334 2107844 1024 4 3008 5780 451113 101900 1024 8 4446 7129 597452 163419 1024 16 7916 9977 676819 281014 1024 32 17829 14358 338298 330539 1024 64 11036 11634 534478 346401 1024 128 25897 36346 530845 873705 1024 256 14367 22153 1485733 933322 1024 512 29776 69240 958098 686886 2048 4 3440 4218 550714 292574 2048 8 4644 4621 328740 411655 2048 16 11933 10574 237475 537515 2048 32 12688 22758 467382 511098 2048 64 13282 20796 698493 832535 2048 128 27759 29803 349912 453898 2048 256 37426 60393 1570714 486246 2048 512 34219 54515 379182 627423 4096 4 3505 5043 187553 142168 4096 8 9394 7278 193775 517952 4096 16 21151 15565 285575 463871 4096 32 34207 39336 552606 875817 4096 64 1712 28477 1317898 922121 4096 128 21534 39553 564963 301106 4096 256 31311 41376 583301 387616 4096 512 20232 30450 724192 153350 8192 4 4859 4521 172962 242316 8192 8 9164 8103 273238 276758 8192 16 10994 12725 356374 507905 8192 32 13977 17405 402792 384204 8192 64 20478 29874 381360 653527 8192 128 21273 30129 558760 1011985 8192 256 35617 48334 364089 363927 8192 512 22471 40228 730067 510085 16384 4 4146 5458 233906 150227 16384 8 8661 9247 545969 365234 16384 16 9874 12685 246869 240439 16384 32 12007 16697 338688 328015 16384 64 17941 30585 597301 473839 16384 128 24368 37013 800825 704087 16384 256 27154 36008 385551 379901 16384 512 19376 28454 290934 332016 32768 4 4255 5121 189885 193913 32768 8