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 14 18:54:33 2026 Auto Mode Machine = Linux oleg121-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-oleg121-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 4249 5559 484710 91936 64 8 4133 7350 349613 688639 64 16 4469 9939 367817 633392 64 32 7454 33770 969761 889431 64 64 4182 81944 1232453 1679761 128 4 1790 5959 236111 203144 128 8 8190 20725 824932 695603 128 16 8043 17723 1093856 646983 128 32 8989 71025 767171 757430 128 64 5047 52180 1059322 1231904 128 128 12409 32569 983630 25522 256 4 2661 5354 285129 362040 256 8 3694 11446 362162 633922 256 16 14392 23447 1184092 865358 256 32 12203 50794 828628 488551 256 64 10627 28249 1463250 1262029 256 128 20980 47743 1489641 1570244 256 256 9614 89390 1696795 2170027 512 4 4798 6954 469312 411884 512 8 7769 20636 922535 553502 512 16 14495 10584 577310 596721 512 32 19737 34096 1391032 1463057 512 64 22716 50683 1430887 1057974 512 128 25157 65759 1560891 639930 512 256 19359 81775 1130370 1700565 512 512 30059 108224 605982 2152206 1024 4 6986 9282 364542 566707 1024 8 7749 12295 764799 737231 1024 16 22477 14340 884319 765208 1024 32 17348 46198 1013010 823768 1024 64 26261 53108 1336827 90085 1024 128 11109 41460 1438461 901394 1024 256 36425 99329 1602715 757382 1024 512 15505 65485 1160862 512782 2048 4 7045 6028 408134 255837 2048 8 8566 20302 404502 361258 2048 16 15893 16526 650762 436950 2048 32 21436 25812 1231566 978039 2048 64 28134 26826 465861 751012 2048 128 23336 61340 814612 397428 2048 256 34517 51680 350012 623642 2048 512 32618 68981 1582579 1425051 4096 4 6490 6393 413994 312954 4096 8 9125 13038 748519 521981 4096 16 11978 21892 592351 417100 4096 32 17268 28861 438308 415627 4096 64 23251 26620 388028 412117 4096 128 22661 35939 579094 377581 4096 256 39581 49323 776778 428630 4096 512 29186 61698 1509282 646472 8192 4 5679 6209 142774 155925 8192 8 7230 8507 170156 219224 8192 16 12623 15299 373756 224919 8192 32 14813 24300 299118 122735 8192 64 21086 20199 724570 485994 8192 128 23333 39235 1050666 686552 8192 256 31696 36195 577758 682217 8192 512 31377 35993 582064 1315164 16384 4 5839 6928 142418 236493 16384 8 7743 8494 243435 162668 16384 16 13086 15001 627381 391287 16384 32 13746 19912 712068 853331 16384 64 24239 31444 844885 842586 16384 128 27037 43232 1008181 877892 16384 256 29389 43728 1182803 832904 16384 512 37249 51250 880535 865323 32768 4 5913 6803 182269 200861 32768 8 9224 11355 602972 520342 32768 16