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 Feb 27 02:02:43 2026 Auto Mode Machine = Linux oleg216-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-oleg216-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 3016 14594 79306 104906 64 8 4232 19535 250919 418250 64 16 5666 17704 363829 342477 64 32 9883 32752 308970 538156 64 64 10904 79399 983980 1638743 128 4 4634 14876 110064 119735 128 8 9370 15104 243832 251956 128 16 6713 12600 237889 492178 128 32 12959 72522 578645 336848 128 64 11178 80348 707520 670413 128 128 8670 109391 1185654 1243315 256 4 8535 16505 45845 94189 256 8 14611 18273 298360 224782 256 16 17320 40512 433169 348752 256 32 18230 84044 1076103 616807 256 64 14972 87912 711178 707430 256 128 20463 120810 1362952 274627 256 256 47779 124264 2114473 1619994 512 4 15074 16576 147900 157777 512 8 17595 29150 237584 265422 512 16 13892 31068 395644 364362 512 32 26894 52468 308643 535024 512 64 46775 91410 266245 895230 512 128 17598 135840 636139 1001715 512 256 33186 102340 1406520 761841 512 512 26166 125029 1538526 1815584 1024 4 8549 7290 99051 113174 1024 8 16342 24511 140985 138713 1024 16 28889 62999 463328 331611 1024 32 59074 90949 392815 738245 1024 64 27384 35174 815323 183704 1024 128 37560 109226 705735 378018 1024 256 39869 64946 1379773 835303 1024 512 34397 84676 2338280 302871 2048 4 10015 14094 108601 144909 2048 8 21653 26087 299982 255875 2048 16 33794 41813 280169 166085 2048 32 33200 36907 742572 276534 2048 64 38393 90243 852615 815231 2048 128 48140 90808 544397 942932 2048 256 40721 132358 1454489 1258818 2048 512 35463 80112 1429319 665999 4096 4 12145 14217 96939 77162 4096 8 22346 26050 185668 159663 4096 16 26976 41096 131257 289819 4096 32 39470 55564 544756 501282 4096 64 44930 66104 760514 954076 4096 128 68112 67730 1239277 1117040 4096 256 44830 107247 1764788 476770 4096 512 58370 76121 629672 1272789 8192 4 9547 10656 109067 147537 8192 8 18554 20424 133681 173441 8192 16 22837 29570 474183 424940 8192 32 30237 42011 358954 412988 8192 64 53668 78917 527873 562907 8192 128 49392 80010 733198 1023104 8192 256 50350 92716 1434895 1203290 8192 512 56009 95063 1607186 982133 16384 4 11390 4153 100337 117766 16384 8 17719 22222 203613 260713 16384 16 24249 29508 507181 306202 16384 32 33614 50077 686009 598545 16384 64 42269 65202 652229 516374 16384 128 59537 85765 842410 593407 16384 256 72637 106734 1122577 853469 16384 512 66768 102085 1828335 1816783 32768 4 11550 12790 86762 138842 32768 8 17326 24014 160660 213877 32768 16 30912 39778 439792 352401 32768 32 40595 48227 573118 445326 32768 64 44157 74255 453323 798340 32768 128 57524 79885 1249583 662140 32768 256 50824 74239 1604699 1330576 32768 512 70647 89697 1516972 1021411 65536 4 11756 11260 112537 105199 65536 8 19198 22425 209312 205477 65536 16 30928 40293 356476 385261 65536 32 45020 57376 280245 334476 65536 64