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: Mon Aug 24 16:39:00 2026 Auto Mode Machine = Linux oleg159-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-oleg159-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 3043 4776 500060 331481 64 8 3847 20050 608965 610350 64 16 1427 23006 901377 760859 64 32 7364 62502 1083249 929467 64 64 5664 51396 353294 214096 128 4 4758 5869 653282 595328 128 8 4242 22471 809997 414314 128 16 10256 53650 1266785 1065630 128 32 12615 75788 1266785 1102844 128 64 6001 29547 1377278 1409828 128 128 13529 67796 919605 2166499 256 4 8500 14160 643033 464661 256 8 7224 14645 1184092 349206 256 16 12265 29253 616807 373240 256 32 10081 29997 1142514 371048 256 64 10559 104880 1514860 1347557 256 128 10036 76949 1532153 1173737 256 256 23907 112885 636553 2135500 512 4 8572 8517 428057 394120 512 8 7126 20601 797489 558396 512 16 23388 13651 1062161 782951 512 32 16261 69060 1155924 1051242 512 64 19793 72905 591136 1073309 512 128 24446 65743 614654 689001 512 256 30826 62023 683518 508905 512 512 22139 116150 1963313 1842059 1024 4 11217 6424 585160 568282 1024 8 9147 16101 452921 384791 1024 16 20909 35129 920717 648903 1024 32 33437 55282 875308 958739 1024 64 19321 36781 708178 694326 1024 128 18565 23681 1230718 1187831 1024 256 21665 95255 541759 642785 1024 512 25951 80916 642400 1034232 2048 4 4076 5605 237863 303629 2048 8 10520 11305 795010 573855 2048 16 20348 14290 294006 339579 2048 32 13227 22380 682455 498521 2048 64 40223 42027 701115 410494 2048 128 14596 71986 912579 652442 2048 256 26697 54888 261363 478499 2048 512 33274 72054 617412 449221 4096 4 5397 6972 372974 244185 4096 8 15273 11572 471019 236380 4096 16 16411 18026 508373 485542 4096 32 19533 35295 590539 413357 4096 64 25019 57757 712597 979702 4096 128 32097 71758 933039 963331 4096 256 37469 52467 1201573 1121562 4096 512 31297 46856 299829 465455 8192 4 5786 7592 253999 301063 8192 8 12233 13210 462721 503536 8192 16 10843 21316 253198 409172 8192 32 19438 23288 509102 478529 8192 64 29515 18202 522519 538665 8192 128 30760 81149 1302156 780427 8192 256 45145 50126 635775 658209 8192 512 40117 52609 629336 831334 16384 4 6273 7663 361693 209549 16384 8 13226 11857 510421 387420 16384 16 16475 19120 363216 332304 16384 32 22705 34321 857666 1183210 16384 64 42824 41518 1056835 937243 16384 128 34344 43398 1205862 533367 16384 256 34898 37515 522133 351150 16384 512 33959 42780 1418657 694151 32768 4 5211 7663 193957 260114 32768 8 12649 14313 597150 510405 32768 16 19666 23577 496822 310939 32768 32 22117 26983 582833 444582 32768 64 35369 42521 637336 642511 32768 128