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: Tue Sep 8 01:03:38 2026 Auto Mode Machine = Linux oleg424-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-oleg424-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 3734 13350 438759 467002 64 8 1205 8509 674790 571375 64 16 2732 22267 821391 587635 64 32 1821 12794 983980 809014 64 64 3344 59988 1083249 1879725 128 4 5305 7612 339403 490380 128 8 3700 10100 707520 606082 128 16 4507 8321 1102844 800337 128 32 6417 29479 1243315 876086 128 64 7608 41368 1243315 780556 128 128 6030 18574 1336145 1467639 256 4 5301 4889 296957 239899 256 8 6035 8390 847597 385571 256 16 7273 18319 354978 834424 256 32 8754 22118 1103757 150051 256 64 5950 52460 1128110 1080434 256 128 14154 63225 366739 564887 256 256 16647 32164 1391207 1340826 512 4 3092 3927 356795 473660 512 8 6924 14859 409918 423165 512 16 17841 15153 295438 462938 512 32 17385 35391 531186 900108 512 64 15717 49650 552363 914287 512 128 11565 18734 1245780 427036 512 256 13300 31728 890404 1267845 512 512 21352 45241 1605228 1458090 1024 4 3136 5056 329146 436311 1024 8 8607 8392 237542 240603 1024 16 5455 12189 952573 249333 1024 32 10318 38474 659363 384412 1024 64 13364 18232 585081 336733 1024 128 16859 30256 235137 1159609 1024 256 29017 39273 183187 173858 1024 512 27494 30928 857654 931904 2048 4 4587 4334 127689 149193 2048 8 5292 7184 222100 217017 2048 16 7797 10353 269718 661690 2048 32 14669 18002 1033835 608231 2048 64 11365 27130 635406 1023487 2048 128 25386 33675 503459 696341 2048 256 32449 30262 342299 346245 2048 512 39879 46868 600786 514311 4096 4 3718 5172 314351 130712 4096 8 10518 12423 177178 212812 4096 16 8919 19937 269455 238692 4096 32 11291 11469 321354 204158 4096 64 18556 14520 270490 497566 4096 128 26312 28008 802504 654925 4096 256 18205 29882 1648928 574965 4096 512 18306 47066 255904 292947 8192 4 4492 5230 197946 299403 8192 8 8308 12149 263011 270060 8192 16 9499 15290 485048 539977 8192 32 14683 25405 357181 283106 8192 64 20669 20768 666276 393222 8192 128 21773 31875 666005 228673 8192 256 20137 29655 341943 259364 8192 512 28011 47842 752384 627588 16384 4 5448 5575 185545 359408 16384 8 8457 7855 282482 230903 16384 16 9273 13331 445773 286935 16384 32 10785 21307 364405 272830 16384 64 16834 26271 621003 652775 16384 128 20756 22452 731627 392384 16384 256 23695 33590 880863 625867 16384 512 27612 32125 532672 638806 32768 4 4428 4245 242347 155466 32768 8