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: Fri Aug 14 20:03:00 2026 Auto Mode Machine = Linux oleg438-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-oleg438-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 2825 8340 538156 254971 64 8 2820 18068 735831 591520 64 16 3563 38207 1105556 279676 64 32 4714 25267 1226821 1049372 64 64 4995 20163 467002 1638743 128 4 2080 5234 715059 304727 128 8 3807 14695 688467 776042 128 16 3598 16817 1266785 748976 128 32 4723 17510 1278855 1123617 128 64 3351 73525 1424795 1455701 128 128 9229 69797 1319723 1526043 256 4 6087 9345 322851 382685 256 8 11741 7834 841618 335041 256 16 3573 9832 931416 716876 256 32 5955 20328 744204 606357 256 64 5813 19929 807442 1311351 256 128 17378 30835 1027695 1312954 256 256 10499 101470 1514860 2097948 512 4 7450 7880 420349 306397 512 8 7976 19421 659991 541773 512 16 13165 15568 1062161 942786 512 32 16946 30304 1216149 558832 512 64 7958 9526 1201856 600895 512 128 8414 30135 317637 975328 512 256 14708 64491 1551867 126012 512 512 20444 79109 652174 2073249 1024 4 6536 11207 371414 578539 1024 8 3338 7705 688207 263789 1024 16 8828 8700 456144 960669 1024 32 11117 16527 1250425 217733 1024 64 15063 34649 1432225 233894 1024 128 26650 46201 935966 715493 1024 256 37574 39950 1575668 864908 1024 512 20866 85446 1565902 399836 2048 4 4869 4676 369796 237423 2048 8 10390 10529 154810 207919 2048 16 24236 28687 684031 596241 2048 32 10767 9812 275788 1099327 2048 64 15890 26021 1507057 440333 2048 128 25531 30539 1523630 611348 2048 256 26978 41413 808174 462724 2048 512 19749 61601 1687011 1191258 4096 4 4389 3889 263714 230330 4096 8 6296 6792 576180 345568 4096 16 18062 16892 931117 498172 4096 32 24012 25484 688191 713959 4096 64 24935 35312 421232 415546 4096 128 43151 52559 1597413 790576 4096 256 44003 60161 743916 1104615 4096 512 53320 63812 616477 450562 8192 4 5587 1859 183944 188135 8192 8 6937 7183 201853 333619 8192 16 11806 15946 159538 254987 8192 32 15383 29857 908103 254592 8192 64 17461 22956 465927 419631 8192 128 15288 23635 493137 420103 8192 256 31489 38046 504312 308234 8192 512 29821 53771 815858 870289 16384 4 4706 4410 248152 213441 16384 8 6651 7103 355702 235162 16384 16 11376 10592 447882 395968 16384 32 15444 20828 694151 509705 16384 64 24630 20124 1071819 691518 16384 128 30331 54309 975812 774253 16384 256 30996 68523 933183 396496 16384 512 42753 55447 1082233 683491 32768 4 6851 7591 289869 362811 32768 8 8166 7215 452860 311308 32768 16