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 15 20:40:23 2026 Auto Mode Machine = Linux oleg340-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-oleg340-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 1216 5863 234276 293755 64 8 2820 8447 688639 703068 64 16 1850 5901 1105556 913649 64 32 2294 13297 1336792 1143223 64 64 2266 37144 1124074 1452528 128 4 1903 3294 486381 535903 128 8 2066 8896 581781 545154 128 16 5218 26862 1032829 800337 128 32 7709 8197 1391557 201845 128 64 3669 32678 289604 385460 128 128 6813 95804 1377278 1684006 256 4 7586 11576 562815 483927 256 8 6019 13468 478536 408918 256 16 8091 17615 561343 847597 256 32 10230 39769 119506 955451 256 64 7838 82902 616807 1084800 256 128 8477 51802 1432026 958864 256 256 8109 49573 1497953 1855098 512 4 8392 9007 320816 344324 512 8 10786 18217 632206 571929 512 16 10928 23324 268777 218244 512 32 17539 41772 727268 323669 512 64 11589 78321 1187895 973559 512 128 14683 59555 909255 405736 512 256 10412 29807 844865 1084694 512 512 11821 14336 1030064 1533034 1024 4 4042 5157 102113 277743 1024 8 6723 8235 546099 294603 1024 16 11025 11771 211795 825192 1024 32 14547 18373 726261 195014 1024 64 21668 42526 1242826 591283 1024 128 22264 49082 798053 1145383 1024 256 36974 57437 1036478 520047 1024 512 34000 80896 1061060 280775 2048 4 3829 3719 247136 291898 2048 8 13646 17932 289879 467687 2048 16 22409 29590 622287 284248 2048 32 9737 30574 427555 570615 2048 64 24523 48215 611348 1070022 2048 128 29511 40483 774858 877436 2048 256 29942 53601 850926 1252577 2048 512 39247 40134 153351 1406616 4096 4 5561 4979 212108 165904 4096 8 8423 8653 266355 277037 4096 16 12630 13672 390808 605910 4096 32 13415 16363 348887 357602 4096 64 14233 37091 494259 412196 4096 128 27839 35491 1212855 289492 4096 256 34999 28845 579582 347764 4096 512 31355 73532 421521 478843 8192 4 1887 5804 204938 338330 8192 8 8624 11882 424656 403147 8192 16 11965 15953 369293 622303 8192 32 16080 22060 645243 424499 8192 64 24685 32288 274900 410011 8192 128 19815 47566 537292 420967 8192 256 41333 36540 361758 595697 8192 512 23519 55503 1408774 340823 16384 4 4920 5352 204907 223491 16384 8 9083 8667 303508 475202 16384 16 13376 19429 720527 453071 16384 32 19268 24137 437175 502762 16384 64 21228 26287 556938 502975 16384 128 27960 30084 546899 1204974 16384 256 28303 38907 630929 661496 16384 512 29006 36864 536775 566236 32768 4 5958 6203 329220 188897 32768 8 9796 10528 249864 320140 32768 16 12580 15819 258951 559495 32768 32