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: Sun Aug 23 10:35:33 2026 Auto Mode Machine = Linux oleg315-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-oleg315-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 3583 4329 555990 164602 64 8 3002 31297 789967 383038 64 16 4442 42408 1087638 877797 64 32 4646 40174 1232453 735831 64 64 7729 34244 1722886 1638743 128 4 8120 8932 546819 158799 128 8 9608 14198 901083 589446 128 16 11449 27033 337695 826202 128 32 6633 52563 1229084 1048974 128 64 9876 102323 1057236 1206978 128 128 6017 73435 1539168 1455701 256 4 8736 13219 456366 382004 256 8 13469 23296 606357 563701 256 16 7558 53423 1173737 847597 256 32 11408 83521 1122215 1122215 256 64 7944 80202 805021 1361224 256 128 15825 25955 1254656 1347557 256 256 26183 41959 1300235 1897721 512 4 6630 7886 504363 164472 512 8 16530 17360 918982 647260 512 16 9496 28020 1057454 988345 512 32 9739 35892 1276891 1120344 512 64 24602 55543 1358474 617659 512 128 36423 51138 1463057 982917 512 256 35336 152837 774480 579804 512 512 22943 105218 764281 2497638 1024 4 4552 6762 465891 171491 1024 8 7693 11540 228579 702847 1024 16 28572 18974 1107005 789399 1024 32 15021 28862 488075 724668 1024 64 19768 77004 1119120 749060 1024 128 38941 65695 931702 622927 1024 256 21653 65620 1554004 571458 1024 512 34082 55555 618710 481239 2048 4 9422 7592 291156 174122 2048 8 13670 17209 637055 474954 2048 16 16666 15842 1115459 352612 2048 32 18402 47502 816238 427024 2048 64 23860 37883 548463 1244953 2048 128 26829 60746 1047577 994112 2048 256 26439 95714 868476 1386635 2048 512 27851 72577 431615 557577 4096 4 6548 10553 236709 204883 4096 8 12244 15793 273648 525992 4096 16 15495 18941 455218 585887 4096 32 21353 25545 760514 393169 4096 64 23757 50810 969693 833213 4096 128 34334 43097 572132 631106 4096 256 31148 64023 1043556 1443831 4096 512 34245 107614 772378 1032270 8192 4 2349 8666 388281 248198 8192 8 21937 16708 527217 379540 8192 16 19363 51672 753291 540053 8192 32 22388 45153 644529 652435 8192 64 30813 34433 745479 678030 8192 128 46377 54387 734044 1372698 8192 256 33064 61232 1136805 1456859 8192 512 41997 53430 1030839 351136 16384 4 7488 6938 224672 265589 16384 8 10695 13341 359763 241374 16384 16 17391 19468 600407 388311 16384 32 27207 29023 533263 321128 16384 64 28318 37955 637514 388577 16384 128 32113 41362 1305714 722656 16384 256 30348 43420 876056 746765 16384 512 42582 61755 978090 597759 32768 4 7005 8105 203352 215072 32768 8 13065 13667 585959 349771 32768 16 16442 19637 321094 302580 32768 32 18881 29584 863408 751320 32768 64 23154 35088 839497 800004 32768 128 33827 42511 666258 629331 32768 256 37392 51745 800801 805999 32768 512