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: Wed May 20 16:58:51 2026 Auto Mode Machine = Linux oleg260-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-oleg260-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 8191 15752 659861 500060 64 8 8745 28094 725882 541412 64 16 5966 44510 983980 831569 64 32 5894 47825 983980 1363961 64 64 10452 57043 1083249 987600 128 4 5401 9523 407707 450846 128 8 5127 9091 513847 73184 128 16 10584 43053 921183 699227 128 32 12824 71987 587511 1278855 128 64 17500 79058 1102844 1346196 128 128 16293 117200 1911894 1939522 256 4 6151 11528 298029 347398 256 8 8106 14702 483056 861885 256 16 15405 27756 1032636 864661 256 32 11367 59055 931416 1766587 256 64 19056 65440 1715775 1213534 256 128 36676 154034 1752173 2045979 256 256 24103 121963 1175022 2210228 512 4 7426 11059 525082 381245 512 8 16306 11693 584539 561462 512 16 22998 38398 1821745 676414 512 32 17690 58803 1209982 66954 512 64 24662 64882 1438555 640694 512 128 26701 86488 1585086 1418599 512 256 20257 194981 1475116 2314583 512 512 64631 109874 2449212 1940253 1024 4 8017 17332 489465 802526 1024 8 16254 26344 1262555 1091809 1024 16 25346 25531 793775 989212 1024 32 31938 53951 971534 874417 1024 64 46560 44902 1400926 1029029 1024 128 36887 85589 898189 1144163 1024 256 72326 126468 2295784 1250425 1024 512 46090 124269 1664841 1687075 2048 4 11357 11875 684740 343229 2048 8 16106 17431 340427 421740 2048 16 25633 37763 939837 555917 2048 32 30243 26223 326628 478739 2048 64 42708 45407 1298788 671728 2048 128 45725 109284 1777789 1333259 2048 256 65540 142408 1053487 1494732 2048 512 44711 85426 1096941 1722532 4096 4 9247 9757 315268 490477 4096 8 9909 21008 1283631 568722 4096 16 26795 22502 792582 493861 4096 32 32054 52504 1140624 715207 4096 64 32883 58360 907364 1154498 4096 128 56995 79647 721485 807256 4096 256 45176 119281 1978608 1423257 4096 512 66467 59079 1112123 1649562 8192 4 11186 10038 297317 335227 8192 8 16069 23906 556560 488225 8192 16 31759 29972 664768 978162 8192 32 39346 56175 1334420 833796 8192 64 42561 61024 1118233 1158539 8192 128 56559 102063 813174 691763 8192 256 49104 92700 1456365 1137295 8192 512 69135 89774 587327 826376 16384 4 12036 4777 381813 296441 16384 8 17031 22296 534030 421540 16384 16 25278 36591 1128291 869450 16384 32 44230 53059 1000854 747716 16384 64 46855 70307 1208067 983310 16384 128 54777 72015 1889517 1287633 16384 256 58033 82989 1638565 921014 16384 512 51294 81873 669775 779452 32768 4 11427 12181 330385 329665 32768 8 19039 18856 467893 480956 32768 16 34899 34534 906692 767400 32768 32 45463 47690 1658292 746237 32768 64 50381 82304 1459340 1043965 32768 128 72978 82443 1024449 773707 32768 256 55382 85084 2032765 1127012 32768 512 63615 110483 728972 1028851 65536 4 12274 14424 483514 491311 65536 8 20465 28472 795493 865207 65536 16 39940 44433 870341 1062256 65536 32 43543 61323 1126882 744049 65536 64 53713 76329 1376724 861727 65536 128 61034 93972 1715822 1390858 65536 256