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 Mar 30 12:35:02 2026 Auto Mode Machine = Linux oleg414-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-oleg414-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 1469 6475 90115 127473 64 8 2469 15366 71339 227718 64 16 3036 19241 380864 333126 64 32 2341 18396 592827 571375 64 64 3518 57705 842003 1033216 128 4 1964 9571 131014 55849 128 8 4449 9473 237468 21386 128 16 2716 8396 67439 339403 128 32 3329 10513 267258 551312 128 64 3816 10840 261785 179028 128 128 3332 82055 361576 895074 256 4 3639 3606 67510 24142 256 8 5661 4411 67527 221444 256 16 7333 22534 426628 346949 256 32 9394 12177 194984 117750 256 64 7455 34006 461267 447428 256 128 10766 80071 914752 839644 256 256 14211 69301 1368162 1552085 512 4 2939 3950 44572 60363 512 8 5676 6129 239920 147717 512 16 7058 9929 83333 143176 512 32 7529 22050 402844 204975 512 64 15900 37196 804962 718028 512 128 14167 41823 467168 603767 512 256 18230 56793 1240025 701378 512 512 16941 52800 756474 1823291 1024 4 5752 5073 33794 35533 1024 8 7295 7637 110772 61372 1024 16 12190 18585 158686 400619 1024 32 20689 12697 429891 342151 1024 64 15824 27182 282716 776272 1024 128 19407 69007 518227 1019019 1024 256 24699 62393 1227903 1247157 1024 512 31951 90691 444254 1602715 2048 4 4320 8566 55312 56607 2048 8 10335 17282 164975 120613 2048 16 10216 18648 176552 192864 2048 32 18368 17717 410161 174358 2048 64 30583 34955 203863 405304 2048 128 16325 21504 262795 924562 2048 256 27271 36344 1221930 1036955 2048 512 38133 45472 783838 1229274 4096 4 5568 4857 41576 49760 4096 8 6370 11290 140153 108508 4096 16 11112 12670 221524 204891 4096 32 18691 29139 159086 334532 4096 64 17893 21224 251609 401447 4096 128 16894 33306 451201 517562 4096 256 43143 82966 1437188 524051 4096 512 21107 25574 528516 613899 8192 4 4376 4016 89667 71635 8192 8 8910 8336 169266 117694 8192 16 13343 17856 214912 138904 8192 32 18176 19551 216491 253151 8192 64 25584 32862 257471 292277 8192 128 29331 32460 492783 521916 8192 256 30236 44832 1000726 376331 8192 512 42633 54091 961385 720363 16384 4 7130 6775 41535 50005 16384 8 8432 7487 59811 101147 16384 16 9329 14015 214979 171486 16384 32 17319 22287 199243 173373 16384 64 23487 23380 253889 341604 16384 128 25425 28431 485150 361001 16384 256 25394 41677 429733 415015 16384 512 28805 35498 627639 629092 32768 4 4577 5246 45523 49376 32768 8