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 Aug 18 20:21:15 2026 Auto Mode Machine = Linux oleg135-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-oleg135-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 1058 2303 674790 321940 64 8 3078 10645 771797 451299 64 16 3496 13849 429630 688639 64 32 1076 42951 998622 969761 64 64 2057 28070 1070292 2067979 128 4 1877 10685 460514 340480 128 8 5754 7435 650117 666253 128 16 5653 30940 771581 490380 128 32 7892 41624 852438 990891 128 64 7462 50673 809997 955616 128 128 8651 78001 1319723 2132084 256 4 6492 9186 385571 338633 256 8 7904 9226 287958 45869 256 16 6143 9799 917096 452329 256 32 10683 5225 1114064 917096 256 64 12228 27835 1327564 996229 256 128 8776 43432 103515 1053922 256 256 12314 81166 1591186 1549845 512 4 4466 6925 76957 227854 512 8 4658 4859 687237 343608 512 16 3994 4871 254628 594079 512 32 12106 27203 317825 247839 512 64 7269 22101 1394645 219448 512 128 8594 32572 1248678 1120344 512 256 11097 28848 1055375 1497750 512 512 20753 83880 760762 1674052 1024 4 4737 2634 387744 170328 1024 8 6897 6815 544093 176647 1024 16 5545 15503 454310 88383 1024 32 10718 15475 165402 776272 1024 64 21612 28338 569865 851870 1024 128 29799 46475 992182 1223356 1024 256 34077 60083 1432225 776975 1024 512 26530 59928 673318 256128 2048 4 5561 8849 392112 252001 2048 8 16769 13781 499885 536944 2048 16 21555 9683 278796 446791 2048 32 13431 38373 600199 955200 2048 64 30802 21749 599194 593440 2048 128 28791 32708 390988 223557 2048 256 23800 36803 624958 741226 2048 512 23402 56896 1697009 1186486 4096 4 4234 4096 199882 165803 4096 8 8040 9144 316686 230488 4096 16 9313 27042 332738 489541 4096 32 12030 16887 687695 278167 4096 64 20894 22734 499577 221621 4096 128 19649 21878 1335519 448574 4096 256 29834 57028 484106 573660 4096 512 26587 39965 778256 520195 8192 4 5968 6466 263764 201698 8192 8 8621 13006 313928 254828 8192 16 9246 9851 330656 241545 8192 32 11970 15193 324488 595780 8192 64 17605 21850 592676 361533 8192 128 23014 30787 509260 571625 8192 256 20229 39863 805435 614007 8192 512 25301 39620 852793 642204 16384 4 3082 4070 259828 303188 16384 8 8232 9766 403624 206080 16384 16 9216 13522 523214 279957 16384 32 12162 18030 742762 510038 16384 64 24055 22743 422442 268110 16384 128 16895 32295 494388 326576 16384 256 33792 35942 940901 912599 16384 512 32642 41863 769493 382874 32768 4 4766 4819 123939 124185 32768 8