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 Jun 12 12:22:53 2026 Auto Mode Machine = Linux oleg253-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-oleg253-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 5354 11895 586352 516414 64 8 6692 27586 901377 679917 64 16 4811 53872 969761 710511 64 32 15083 77118 780776 1013707 64 64 5317 75386 1232453 1599680 128 4 11516 11176 703810 587511 128 8 4189 13348 887675 684081 128 16 10178 45946 251366 673778 128 32 8733 88333 1254941 998261 128 64 17852 97333 1142750 1185654 128 128 9698 119522 1440082 1939522 256 4 4962 11128 124566 359014 256 8 19410 22783 768712 660030 256 16 6924 36962 977189 280364 256 32 11403 39781 891956 105612 256 64 13497 16759 1332507 382140 256 128 13319 39203 841618 1398455 256 256 7217 41645 1673001 2152625 512 4 6742 9118 435082 257807 512 8 4357 6904 896725 96490 512 16 5239 14472 1115109 678337 512 32 24518 32561 1046631 1645826 512 64 33644 79281 1007827 1276891 512 128 36229 39270 1282994 1150351 512 256 24888 153712 1667552 1279935 512 512 18913 34401 1520013 2169601 1024 4 7625 7883 386836 374295 1024 8 20361 14452 812086 627845 1024 16 11052 14296 704808 986485 1024 32 34044 42687 640867 963255 1024 64 59109 56715 757916 896689 1024 128 17101 47102 887242 878171 1024 256 18200 79373 231611 1239956 1024 512 17126 30532 482103 1381993 2048 4 4291 7406 187373 186301 2048 8 9968 17468 406204 228365 2048 16 21421 23097 193480 286590 2048 32 31419 35950 997576 516538 2048 64 16462 24232 691687 1044901 2048 128 37400 50123 751801 824860 2048 256 49164 72047 1423162 1100454 2048 512 20386 30693 478713 592744 4096 4 5437 4507 1617 139961 4096 8 10717 11045 137035 304398 4096 16 18354 16461 657683 345658 4096 32 22594 33023 524451 629672 4096 64 35104 39796 1201153 863969 4096 128 34593 38770 1153490 1205790 4096 256 22376 88886 1208929 602616 4096 512 33111 67450 1685489 880847 8192 4 10222 5471 195503 151591 8192 8 12057 11364 451099 341776 8192 16 21262 21275 327641 373703 8192 32 16260 22278 393998 219360 8192 64 28905 35596 328283 567865 8192 128 30643 53564 943228 1056091 8192 256 28795 41935 1020551 417895 8192 512 34662 50882 913657 894812 16384 4 6500 8895 404035 356538 16384 8 14751 14045 284617 502979 16384 16 18086 20382 766575 525901 16384 32 17011 21959 292905 474979 16384 64 21841 28881 642485 683722 16384 128 24012 33427 701700 496485 16384 256 28711 44941 349257 589670 16384 512 34712 41322 1008936 571610 32768 4 6722 6863 284185 315504 32768 8 10833 10739 213491 164417 32768 16