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: Mon Jul 20 17:57:04 2026 Auto Mode Machine = Linux oleg336-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-oleg336-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 1569 3094 529661 87301 64 8 1887 12345 771797 647135 64 16 3229 36632 1017549 789967 64 32 5197 50516 1255511 998622 64 64 5333 34994 1232453 1933893 128 4 3604 3522 659704 496272 128 8 2210 6817 241963 603357 128 16 8520 31760 985435 421139 128 32 9460 37174 1155043 1048974 128 64 4209 46056 1291158 848397 128 128 3335 63528 731625 1967960 256 4 4512 8138 593947 436870 256 8 4733 8846 625794 250475 256 16 8217 11998 179651 45878 256 32 5047 48798 973645 797250 256 64 10562 51447 988889 612584 256 128 9397 44467 1213534 1523457 256 256 10042 83606 1729594 1855098 512 4 7309 8183 635198 436852 512 8 6738 12050 863203 457124 512 16 10341 17284 1075998 539053 512 32 17064 12039 803757 851903 512 64 17061 49397 971357 1040545 512 128 18671 48443 1299295 521891 512 256 16464 31289 1319250 1391032 512 512 25496 47779 1302447 2116152 1024 4 10069 12134 274091 153113 1024 8 12320 12475 388902 634429 1024 16 12300 8071 168702 256006 1024 32 11736 16992 1016847 592915 1024 64 13835 52127 1241031 1045053 1024 128 14171 40205 229802 388621 1024 256 19119 58635 286908 1036478 1024 512 19516 71869 735086 1656494 2048 4 5790 4276 300643 224539 2048 8 12745 13835 253751 221814 2048 16 21299 16768 1054522 904603 2048 32 7732 12455 1174321 247158 2048 64 23152 41671 909006 564800 2048 128 26964 70293 966920 494674 2048 256 30717 37715 715302 1306095 2048 512 56327 72670 717573 1308682 4096 4 6716 5376 346852 178920 4096 8 9278 10258 354598 270968 4096 16 12753 19176 337981 1045143 4096 32 26672 21330 461938 554855 4096 64 26141 41435 1126489 617518 4096 128 30961 35090 952595 295461 4096 256 22260 47591 635143 651497 4096 512 27255 30898 1166571 407890 8192 4 4919 7086 276457 222850 8192 8 11380 9185 595047 329340 8192 16 15853 19517 500945 257018 8192 32 17070 21565 637261 704081 8192 64 19858 24562 672852 256255 8192 128 31254 74983 915532 628564 8192 256 31609 41859 489861 686661 8192 512 41134 51050 947180 625395 16384 4 5510 7017 314012 256368 16384 8 8065 9271 445086 453837 16384 16 12954 17338 547043 366205 16384 32 16391 17105 669605 588508 16384 64 23172 25905 402238 562795 16384 128 25622 36405 726984 533388 16384 256 25777 59922 648383 642233 16384 512 33597 52274 953287 944704 32768 4 6251 8425 230868 366241 32768 8 11037 12710 287600 338085 32768 16 16828 14986 472094 310617 32768 32 16850 20149 434835 451150 32768 64 21131 23240 502607 479928 32768 128