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 Apr 28 20:12:46 2026 Auto Mode Machine = Linux oleg437-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-oleg437-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 2746 11843 145429 174444 64 8 6134 11937 95671 174330 64 16 5737 22245 372410 754443 64 32 4600 52206 666414 320021 64 64 7111 96392 969761 852702 128 4 4273 12912 125501 93910 128 8 7690 17080 161231 33763 128 16 10145 33844 371073 126835 128 32 12486 36631 637004 551878 128 64 6706 85792 761728 853794 128 128 7457 72728 1022989 1424795 256 4 5799 6269 61866 134591 256 8 8342 17429 196303 256519 256 16 18446 34830 316382 247588 256 32 21326 30955 693718 514045 256 64 17828 83821 790209 876662 256 128 17416 104665 1489641 1123389 256 256 18876 59759 1213534 295324 512 4 8261 11075 70620 75851 512 8 15613 27220 218599 234012 512 16 20522 31515 381245 287450 512 32 24971 44088 476286 286491 512 64 38870 79999 603089 920558 512 128 32251 86165 1533034 957072 512 256 26337 115234 1180062 444907 512 512 27973 118686 2405320 975328 1024 4 13059 16526 145391 178839 1024 8 21400 27354 262772 118945 1024 16 29651 37152 323128 313139 1024 32 31089 62992 199963 492496 1024 64 29031 44122 958739 736599 1024 128 47158 109871 1127641 900637 1024 256 63602 71076 1825466 1132697 1024 512 43406 89990 1563053 1034481 2048 4 10765 15554 112472 118668 2048 8 21889 27810 241142 245266 2048 16 32892 46485 432615 350569 2048 32 35344 63939 440152 784124 2048 64 42107 88708 1329957 1094007 2048 128 64546 122929 1548069 982739 2048 256 63858 119688 1312882 1278301 2048 512 76789 148643 1548069 1435290 4096 4 14642 16661 146437 145599 4096 8 21352 28139 290432 300884 4096 16 37292 45076 366333 336676 4096 32 44926 65570 773421 414024 4096 64 53487 90739 447010 905977 4096 128 65036 103809 1103763 1033822 4096 256 79848 112515 1553922 1232255 4096 512 82593 109827 1653054 1261481 8192 4 14467 14590 156707 122700 8192 8 22141 23977 274990 283658 8192 16 37543 44741 358935 407116 8192 32 47837 64101 685990 523020 8192 64