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 Jan 12 15:25:59 2026 Auto Mode Machine = Linux oleg406-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-oleg406-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 2744 9211 41292 240575 64 8 3589 17826 484710 474430 64 16 3243 16838 142496 598110 64 32 2815 69402 244297 735831 64 64 3319 15414 234276 1232453 128 4 5778 4208 137068 12261 128 8 3497 15498 208752 415597 128 16 12477 66528 546819 558771 128 32 10904 26277 477725 677178 128 64 10117 97174 1240443 803932 128 128 13666 126120 1220700 1508887 256 4 7000 8925 117801 122074 256 8 5640 4661 501091 82501 256 16 7721 31307 246621 358056 256 32 13169 42420 891956 773140 256 64 9075 59547 1044693 991629 256 128 10455 114583 1272498 1028679 256 256 13560 203329 1489641 2613746 512 4 2719 6903 117994 124033 512 8 10008 28084 344324 270606 512 16 19204 55006 61485 339318 512 32 14605 55889 941133 73564 512 64 14258 52357 484015 102564 512 128 19176 66252 2244430 1662389 512 256 22317 82915 1575781 743123 512 512 22682 137599 1434711 1255246 1024 4 12807 7592 52391 72439 1024 8 6477 24506 198182 422242 1024 16 17298 11253 134067 119471 1024 32 21923 54317 886692 221838 1024 64 11482 20291 994941 465639 1024 128 10302 108063 1372279 1186518 1024 256 55501 82222 901394 841522 1024 512 36970 119166 1024121 1039489 2048 4 12107 11817 235264 204576 2048 8 20947 5450 49363 104629 2048 16 17081 10814 367943 244478 2048 32 11911 11175 553517 306489 2048 64 9488 28768 1056857 1174964 2048 128 17945 67218 1284033 101256 2048 256 17926 516 543811 823436 2048 512 23232 38645 1611376 1520394 4096 4 4515 6526 95213 102659 4096 8 12617 8404 139809 210514 4096 16 14755 13996 140273 144429 4096 32 17568 21730 199922 270699 4096 64 22837 30750 426799 559571 4096 128 28746 39437 498475 235958 4096 256 39112 47646 275526 1054574 4096 512 24844 47142 350446 321836 8192 4 4504 5209 90782 90770 8192 8 8424 9361 251605 194372 8192 16 8934 20778 352571 381767 8192 32 15547 26027 319911 246926 8192 64 28160 34585 620236 286575 8192 128 31431 51395 336329 285814 8192 256 24132 44220 680797 607902 8192 512 28338 54144 528239 793109 16384 4 5949 6380 84834 75727 16384 8 8675 11862 138234 154602 16384 16 32473 16799 357964 327221 16384 32 22518 25511 550188 417352 16384 64 30295 22956 457523 450023 16384 128 19156 31121 528177 381326 16384 256 22129 35593 790198 926328 16384 512 26311 47605 272318 719290 32768 4