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: Sat Aug 15 17:26:59 2026 Auto Mode Machine = Linux oleg247-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-oleg247-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 2605 5638 633392 500060 64 8 2699 15514 811459 727850 64 16 1333 29919 1780008 1722886 64 32 10774 47970 1330167 735831 64 64 5933 47478 1143223 1879725 128 4 1255 4716 624409 514339 128 8 2664 2988 901083 1076312 128 16 3649 48573 1093856 921183 128 32 5210 70291 1346196 1165070 128 64 4623 92217 1281909 1349580 128 128 3076 77338 1059322 2464907 256 4 7964 9412 613634 81654 256 8 3491 7018 947860 757326 256 16 9961 10210 1298662 427989 256 32 8970 32168 708831 992545 256 64 10199 51026 620012 1938842 256 128 27009 72156 1422540 1532153 256 256 13519 140877 1805197 536654 512 4 7545 8309 412596 355084 512 8 11541 16613 553645 374269 512 16 14187 44167 665101 1570020 512 32 11438 27541 1022219 1122687 512 64 32649 60419 1729323 1044594 512 128 59954 171760 1677976 253845 512 256 54415 202787 2625909 2198475 512 512 34700 42330 1533034 2708713 1024 4 12431 4048 231524 330947 1024 8 6330 5048 262435 791289 1024 16 9566 28065 1120580 821247 1024 32 32190 24875 171985 34753 1024 64 19231 27642 568583 565439 1024 128 41991 63717 1477555 1117664 1024 256 21337 81456 1627617 1854631 1024 512 39001 81854 1741104 1743932 2048 4 5565 4979 108176 254601 2048 8 10345 6338 906512 107387 2048 16 24782 19013 576745 488208 2048 32 23568 28256 560013 237561 2048 64 26584 31387 1440103 1269797 2048 128 35465 41286 984090 274493 2048 256 19505 70192 765331 824860 2048 512 882 66781 2109095 678788 4096 4 5767 8567 125547 371482 4096 8 9158 16032 679830 992952 4096 16 8993 17078 306954 581564 4096 32 14314 29320 409309 563721 4096 64 20056 28344 1643565 780059 4096 128 25999 30053 934307 584810 4096 256 31937 49185 778856 441281 4096 512 37105 56009 1048396 790104 8192 4 5925 7952 267143 332859 8192 8 10972 8206 392750 217941 8192 16 23314 22510 471833 478335 8192 32 22001 36317 671091 664176 8192 64 22282 35375 797879 403246 8192 128 40024 40637 592636 382698 8192 256 21787 37047 832785 670645 8192 512 29137 55791 516875 633326 16384 4 4634 4563 179505 131231 16384 8 10270 8080 278809 209020 16384 16 15819 10889 326692 414857 16384 32 17702 23764 423032 289930 16384 64 30744 26893 848034 742328 16384 128 19957 25332 509184 602042 16384 256 25479 28881 685550 839990 16384 512 25700 41820 303099 331720 32768 4