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 Apr 24 11:18:42 2026 Auto Mode Machine = Linux oleg206-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-oleg206-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 5227 12754 688639 1083249 64 8 8037 28545 608965 789967 64 16 9380 24492 666414 542506 64 32 6042 75747 2203800 1991276 64 64 7028 85685 592827 1690338 128 4 5615 7961 601330 513847 128 8 4884 33755 870405 631014 128 16 16526 48250 962469 544601 128 32 22906 40023 223714 876086 128 64 13698 54583 1487977 1467639 128 128 13869 112887 1185654 1802755 256 4 5294 9116 613985 613985 256 8 8139 22410 131961 105178 256 16 14519 34562 1062263 659625 256 32 18040 81166 1778290 1208072 256 64 10534 82129 199550 1185399 256 128 11552 86544 850282 1985448 256 256 41377 139143 1453348 2719671 512 4 16175 21073 605128 595232 512 8 25853 16587 793951 1312798 512 16 19892 45258 878386 1640796 512 32 59162 85875 1961520 1077618 512 64 38274 53741 1442420 1492545 512 128 29135 79990 294264 825699 512 256 37965 120099 2768068 728255 512 512 42352 48493 2287463 608041 1024 4 14143 11902 554704 579867 1024 8 13687 22405 419151 794363 1024 16 22832 45673 1146607 591935 1024 32 40629 44124 1450607 261827 1024 64 76076 38889 889631 466499 1024 128 43126 44259 1893052 1928757 1024 256 63307 60710 1638171 2216407 1024 512 36571 73190 619513 968904 2048 4 11964 14683 573510 414736 2048 8 17364 23017 480184 395980 2048 16 25350 45475 1399056 735074 2048 32 31853 52060 689799 855502 2048 64 32703 58504 920402 940352 2048 128 37967 66413 1529327 677931 2048 256 60092 76133 1659632 1510236 2048 512 48291 117157 500351 997576 4096 4 10247 12736 601014 599629 4096 8 16701 23064 319596 846265 4096 16 27290 29310 624114 611714 4096 32 39020 45617 1335104 1228554 4096 64 67095 68632 1195553 1005623 4096 128 36590 69028 1200063 1096017 4096 256 62809 93107 1798034 400073 4096 512 60643 136319 2160499 2147804 8192 4 13210 10767 369508 300082 8192 8 17250 18702 651557 489100 8192 16 26927 34595 695769 771023 8192 32 38805 72701 1367127 890522 8192 64 47974 47979 937642 996228 8192 128 43745 66430 819771 707371 8192 256 69106 69588 984355 900511 8192 512 60744 71867 1570242 1680774 16384 4 10855 11530 770433 336829 16384 8 19936 23915 627765 636345 16384 16 31068 34833 708128 509075 16384 32 44330 51729 829156 487736 16384 64 49438 63103 1070000 694853 16384 128 47169 70390 1529927 1263044 16384 256 48434 68240 885516 1004115 16384 512 68153 108485 1393570 1503813 32768 4 10458 13245 559245 347815 32768 8 17984 19092 540466 367225 32768 16 27383 30876 797238 604584 32768 32 42716 56028 1284562 1369680 32768 64 59261 80490 1563053 1643577 32768 128 64733 70769 951287 866784 32768 256 70398 93136 1448115 990002 32768 512 68946 83806 1307375 1386762 65536 4 11111 13452 414414 520280 65536 8 21708 28602 930840 693063 65536 16 36775 40826 912197 1019936 65536 32 50653 57853 1471298 1238329 65536 64 52147 70421 1524517 1143633 65536 128 74860 106688 709908 1056301 65536 256