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 Aug 26 08:58:55 2026 Auto Mode Machine = Linux oleg151-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-oleg151-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 2998 2951 435202 538156 64 8 8115 19335 901377 831569 64 16 7618 15735 390278 831569 64 32 6410 45684 249985 1017549 64 64 6159 88510 1255511 901377 128 4 3693 9272 597981 537512 128 8 9884 25717 726674 743788 128 16 10628 32071 753179 383258 128 32 14064 45375 143979 1032829 128 64 15707 64942 1114289 1142750 128 128 6557 127589 1455701 2066432 256 4 9262 11784 589706 357579 256 8 15954 23391 551823 735537 256 16 11110 36962 537729 1012194 256 32 20554 65640 1319408 1071806 256 64 9133 72727 396243 1103757 256 128 20652 63352 1347557 581719 256 256 13936 73899 1802167 1339154 512 4 7840 9223 282719 393542 512 8 11882 23844 833713 759685 512 16 15817 41758 705294 421091 512 32 11857 47412 1190529 728502 512 64 16431 83713 1209982 735740 512 128 27943 36028 1575781 1282994 512 256 25731 61917 1329871 296457 512 512 36932 70386 668413 1333173 1024 4 6133 4795 643266 297151 1024 8 7480 12471 735086 201293 1024 16 22197 32433 1026078 656842 1024 32 27637 46215 997946 652254 1024 64 41380 104351 964120 931702 1024 128 38393 70864 1052480 1091809 1024 256 23416 100785 1359680 483732 1024 512 48295 98036 1296474 1242826 2048 4 3973 4893 290782 123619 2048 8 5556 8789 128160 401421 2048 16 9083 9677 484846 167867 2048 32 12417 15513 1268110 395361 2048 64 14900 15545 437596 1261777 2048 128 22971 51122 199906 305944 2048 256 17865 92497 1143524 585472 2048 512 37646 71824 1685687 297839 4096 4 5235 8603 150284 137068 4096 8 13701 14026 247956 276774 4096 16 21038 14734 397435 273087 4096 32 19571 25535 1436587 640113 4096 64 30777 29324 640590 1254114 4096 128 26357 47116 1267344 354203 4096 256 39391 49122 1642308 828792 4096 512 43643 68489 1798034 935172 8192 4 7559 8769 325660 139369 8192 8 7338 12622 219648 383287 8192 16 15663 12804 368679 686387 8192 32 28167 32045 608796 271500 8192 64 28564 32123 502542 422313 8192 128 17420 44365 446260 738604 8192 256 39078 36822 854150 436370 8192 512 34279 47503 1227843 501069 16384 4 5362 6449 509944 430511 16384 8 10981 10313 354456 180787 16384 16 15334 15105 447186 436464 16384 32 18168 32818 743807 680850 16384 64 22205 34154 821916 791956 16384 128 29471 39083 677501 584161 16384 256 32006 39612 1010732 867650 16384 512 40291 43825 841853 886202 32768 4 6095 5878 188587 145678 32768 8 11355 15151 557250 421708 32768 16 16465 21883 745796 385442 32768 32