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: Sat Aug 15 17:07:14 2026 Auto Mode Machine = Linux oleg107-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-oleg107-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 5245 18811 444572 640954 64 8 6534 24855 392561 983980 64 16 9217 23730 1734015 388021 64 32 5793 22655 407457 771797 64 64 6368 64391 47128 1083249 128 4 3980 4292 241419 609522 128 8 9793 20938 811221 649331 128 16 14231 27609 1102844 789741 128 32 10422 49155 415597 1155043 128 64 4397 61533 1622919 1539168 128 128 10207 53801 1622919 1206978 256 4 6856 8637 629094 431775 256 8 10444 10113 648079 768712 256 16 14052 32883 1103757 879535 256 32 14349 21214 1137672 999940 256 64 10133 25733 1430119 1123389 256 128 11147 26364 1600674 1445521 256 256 30008 74416 1752173 1027695 512 4 5085 3949 447970 75977 512 8 20980 7103 964378 801357 512 16 20875 12494 1025636 535024 512 32 19453 50843 627587 531712 512 64 21141 54607 884536 94657 512 128 18648 75261 984720 896351 512 256 16889 66987 885631 1736314 512 512 29796 135412 1662389 1999881 1024 4 8019 13586 542992 636781 1024 8 20387 20125 831100 441786 1024 16 22366 15666 383965 353967 1024 32 41420 39539 1273788 860575 1024 64 30815 69645 1164956 561741 1024 128 54520 66605 946485 1010864 1024 256 25359 74294 1244266 1374474 1024 512 32245 29521 1095150 1393200 2048 4 5055 5644 156851 150258 2048 8 8056 18652 512623 287396 2048 16 18111 29133 718353 770756 2048 32 31073 41410 913064 356979 2048 64 16491 25871 575431 279140 2048 128 22369 76975 1779262 1625402 2048 256 41434 65098 869267 414396 2048 512 54379 44273 1768638 494447 4096 4 7815 8174 212778 527640 4096 8 18986 20807 460329 361393 4096 16 38833 39609 498360 698147 4096 32 49035 63542 1277522 1076783 4096 64 45925 81769 299656 508253 4096 128 47124 44866 1375841 1409479 4096 256 40290 72676 2123381 529200 4096 512 56341 57461 957906 740805 8192 4 11728 18039 645801 353103 8192 8 2379 6337 99967 234197 8192 16 11335 12410 723990 485191 8192 32 14795 41574 1081453 586946 8192 64 42292 66415 359897 1550613 8192 128 44360 38132 1605309 915312 8192 256 39544 49513 958462 750937 8192 512 34927 54234 488579 551097 16384 4 6235 6459 319208 249144 16384 8 8461 13319 781011 568357 16384 16 21451 27525 966208 775494 16384 32 32295 23894 342725 370905 16384 64 15526 22432 897463 493685 16384 128 15091 32487 868033 699813 16384 256 23899 49589 979205 1155846 16384 512 23097 49523 766002 334066 32768 4 5900 5489 318262 370276 32768 8 11680 12736 278670 342646 32768 16 15419 22150 606535 619373 32768 32 30052 44451 591051 311939 32768 64 25458 27695