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 Apr 9 16:11:56 2026 Auto Mode Machine = Linux oleg116-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-oleg116-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 2905 4898 520419 457452 64 8 2692 12246 361380 359444 64 16 2462 14876 983980 651849 64 32 5922 23046 1124074 926260 64 64 4101 38185 1183548 192178 128 4 3446 6335 609522 551878 128 8 4526 17694 684081 289604 128 16 6034 9335 380003 927549 128 32 4567 18645 1858934 1000121 128 64 5122 38073 1243315 479432 128 128 3458 94957 1319723 2098744 256 4 6426 8195 543445 530031 256 8 5271 7062 219184 125060 256 16 10055 21583 1066483 856386 256 32 14697 31836 1040643 947860 256 64 4229 10853 1256123 396828 256 128 9325 35403 502969 509895 256 256 11858 52720 1506359 2114473 512 4 4767 5829 234959 247582 512 8 5081 5367 1383861 320003 512 16 20033 21910 807687 917804 512 32 20583 31043 1279935 345988 512 64 18729 38687 1391032 105918 512 128 30029 28102 1475116 1299295 512 256 14903 95114 237927 519241 512 512 32738 92504 1610042 851903 1024 4 4894 8305 188691 191220 1024 8 5593 17503 69626 348170 1024 16 14731 17053 347579 853224 1024 32 44048 55381 1297649 1166538 1024 64 19623 125474 1584972 952573 1024 128 31721 62891 383828 928479 1024 256 17375 48590 1235319 503465 1024 512 31717 121440 1063161 1537317 2048 4 7095 4903 253115 162372 2048 8 9565 7944 317219 781698 2048 16 9536 30492 289634 196981 2048 32 21406 30509 701573 1135963 2048 64 11912 19961 211633 1086947 2048 128 17181 36281 1667687 1642495 2048 256 31498 57626 1692662 1428131 2048 512 42486 82249 950760 883846 4096 4 5047 4789 215941 163200 4096 8 5555 6979 414494 327523 4096 16 8673 14141 231111 298480 4096 32 13073 13106 510472 329237 4096 64 13194 18093 1641680 637523 4096 128 23755 30819 888868 410797 4096 256 24284 31581 464762 521585 4096 512 25330 52389 544531 727812 8192 4 4908 4364 498966 251867 8192 8 5443 8782 567828 432770 8192 16 13603 19337 693004 538910 8192 32 18541 18307 764181 699266 8192 64 18567 24791 921993 557355 8192 128 26869 28559 374338 595956 8192 256 27775 36323 819204 870025 8192 512 25548 56494 756692 435138 16384 4 4306 4836 237925 180309 16384 8 8675 9276 410329 313328 16384 16 13780 12135 274232 429371 16384 32 20029 21795 560326 527613 16384 64 23814 33074 545224 370451 16384 128 25958 35430 654965 480512 16384 256 31204 39371 435418 371360 16384 512 25751 39091 613354 399181 32768 4