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: Wed Aug 5 09:11:36 2026 Auto Mode Machine = Linux oleg131-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-oleg131-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 1537 11361 1066042 477808 64 8 1097 1806 168002 542506 64 16 2201 24196 855419 821391 64 32 1256 38071 1083249 668072 64 64 3266 57917 1232453 1947927 128 4 3359 8429 566435 533241 128 8 7654 12653 139890 730629 128 16 6699 29637 1000121 864797 128 32 10485 22156 1040839 310724 128 64 15847 59753 1254941 237889 128 128 11195 64351 301138 2027414 256 4 6571 11875 977189 980760 256 8 7843 8505 281614 677522 256 16 7563 14986 891956 876662 256 32 5054 20853 551823 153945 256 64 4472 26825 572721 934659 256 128 4328 31698 1489641 870974 256 256 6337 139577 1718521 1817419 512 4 4945 3106 121040 70165 512 8 3769 4202 586454 672811 512 16 13917 10239 953671 898225 512 32 13984 23342 708084 1007827 512 64 36281 75129 831132 1051242 512 128 47712 83372 1565443 1034032 512 256 36938 46419 368869 899731 512 512 40894 157870 1575781 1002183 1024 4 5426 5940 566035 561081 1024 8 7881 6883 356552 705271 1024 16 14319 14089 249637 965203 1024 32 25513 52048 908640 786507 1024 64 34464 69940 165033 460398 1024 128 35033 50027 1008727 1203137 1024 256 28672 71809 1501313 1350701 1024 512 37818 92309 1701108 1032244 2048 4 7243 9128 759915 464828 2048 8 10819 20423 471668 435555 2048 16 15449 19875 485778 784912 2048 32 13627 15405 525288 157149 2048 64 15321 19527 702319 412981 2048 128 15440 24848 1181103 535138 2048 256 33283 55071 918826 1048600 2048 512 20866 35136 303758 684522 4096 4 1142 2933 146851 100562 4096 8 8692 6089 182156 199095 4096 16 6160 7823 114698 280122 4096 32 22506 38498 691543 526218 4096 64 32742 20844 326794 298236 4096 128 24943 8345 406068 299155 4096 256 8965 24691 204289 326894 4096 512 11131 34936 1836082 1548600 8192 4 3154 3055 156682 189994 8192 8 7140 7694 217282 195335 8192 16 7356 9865 261350 283027 8192 32 9861 20817 436675 365483 8192 64 25651 39592 853959 773853 8192 128 34024 54924 1141261 780108 8192 256 32500 43138 1188597 1019915 8192 512 22394 29233 737478 220636 16384 4 3822 3805 101995 80827 16384 8 6011 5192 255242 115937 16384 16 6631 8834 326856 333035 16384 32