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 Sep 8 22:00:23 2026 Auto Mode Machine = Linux oleg331-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-oleg331-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 2328 4831 587635 346008 64 8 2998 13725 397796 639427 64 16 2507 23061 245190 290890 64 32 3900 32487 1392258 587635 64 64 3017 62140 1255511 1879725 128 4 3894 6713 498114 468553 128 8 5362 12837 272411 609522 128 16 3867 27054 191616 843068 128 32 4077 18572 1243315 962469 128 64 8396 60664 1363288 597981 128 128 10608 71072 1436229 2066432 256 4 6192 11004 454627 349320 256 8 7054 21529 823544 773140 256 16 9521 13963 1028679 764334 256 32 8215 34051 67013 659625 256 64 7337 21178 1430119 1304976 256 128 11392 32787 944525 1058076 256 256 20802 93533 1662639 1237306 512 4 6361 7362 314474 95682 512 8 9702 14991 485767 668413 512 16 6651 9590 1036527 161103 512 32 17646 37074 1340664 872320 512 64 15690 60009 632765 760762 512 128 16334 43716 1630828 616950 512 256 22227 35172 765371 1086890 512 512 20458 77026 1316016 1999881 1024 4 7772 5879 449743 567681 1024 8 8601 18319 401744 677674 1024 16 19647 47554 1056883 936987 1024 32 18824 38688 568282 618354 1024 64 14184 30192 660174 1140517 1024 128 35567 29671 389361 993100 1024 256 19183 51992 674587 1437980 1024 512 34707 60926 1080004 1111877 2048 4 7976 7898 251323 276383 2048 8 16021 13019 459728 223872 2048 16 18292 26856 597277 540526 2048 32 15442 38542 909776 955732 2048 64 20491 33262 1064981 228541 2048 128 31792 46043 913064 887316 2048 256 23070 61463 1582579 1293702 2048 512 35296 91765 1157703 1062347 4096 4 10293 6899 502323 196234 4096 8 9440 20885 284959 373826 4096 16 26665 20108 533738 457814 4096 32 18603 35954 476176 643710 4096 64 31634 49023 656200 818564 4096 128 32074 51587 389276 585149 4096 256 36544 48844 937724 934307 4096 512 38860 81438 1639643 1091699 8192 4 7154 7966 162436 270658 8192 8 12993 13940 393903 464027 8192 16 21174 19238 346998 647175 8192 32 33608 53355 547698 579062 8192 64 51753 49648 800463 780942 8192 128 28946 31748 1216540 1352915 8192 256 2819 79233 934099 674185 8192 512 38323 62764 938923 808772 16384 4 10880 12377 486014 416154 16384 8 17962 13431 598373 460161 16384 16 21626 25857 636663 549593 16384 32 31701 35565 733690 747927 16384 64 27830 37833 677587 1179372 16384 128 46815 46704 1163636 533491 16384 256 43098 39450 610889 413164 16384 512 41838 58857 666417 736260 32768 4 10042 13143 424785 367926 32768 8 17014 19771 688114 677640 32768 16 23158 34356 784841 498979 32768 32 40018 41471 794859 784693 32768 64 46351 56539 1012607 798985 32768 128 39100 57279 1055640 865960 32768 256 55012 82979 1247077 957597 32768 512 53194 69247 1457143 741223 65536 4 10883 12811 656693 474778 65536 8 19729 24372 696643 631678 65536 16 26905 29420 911958 577023 65536 32