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: Thu Aug 27 18:22:12 2026 Auto Mode Machine = Linux oleg352-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-oleg352-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 4394 8918 272300 64577 64 8 5093 6738 809014 203853 64 16 3574 50507 1143223 62986 64 32 2421 16364 426897 852702 64 64 7078 23281 1204796 1947927 128 4 2769 6488 168413 481582 128 8 9249 19589 864797 85723 128 16 4964 12689 420809 962469 128 32 11514 22711 800337 1000121 128 64 9845 17374 325020 1123617 128 128 5657 24178 1359835 1710838 256 4 2551 6471 239257 466275 256 8 6337 8449 195552 536654 256 16 12936 31249 673696 944525 256 32 8783 17904 1103757 721210 256 64 10843 19197 1306564 336827 256 128 6307 47189 1437779 1008392 256 256 17964 53827 1752173 1967260 512 4 4189 7845 183048 482493 512 8 15351 19048 595397 721163 512 16 14716 18525 1160923 1196499 512 32 27669 54753 832743 1010197 512 64 10712 51769 1475116 185434 512 128 25603 88659 1251589 1442420 512 256 24008 58674 1734911 1707325 512 512 17930 114545 1729323 2189509 1024 4 6974 9936 102552 170863 1024 8 11693 13443 625103 431359 1024 16 11277 18455 237648 451920 1024 32 21528 25931 679496 133281 1024 64 12535 28563 1187831 140084 1024 128 17919 32163 839384 341011 1024 256 29998 42216 153590 263498 1024 512 42270 77528 1105580 141301 2048 4 7997 5786 303094 166069 2048 8 7214 11547 548183 495388 2048 16 16175 24719 749113 539677 2048 32 17859 59500 230214 303276 2048 64 29327 57443 1322992 1123483 2048 128 28188 46241 1063926 383157 2048 256 32909 41009 480856 390614 2048 512 22994 58888 834232 844235 4096 4 5065 8453 226122 202901 4096 8 11044 10113 460267 380070 4096 16 13346 19625 492079 304080 4096 32 25622 36289 684735 389091 4096 64 28773 42543 857287 1120610 4096 128 42616 70905 1051605 374649 4096 256 40013 53225 653903 555986 4096 512 37095 60504 1080508 960101 8192 4 7051 6705 261468 166368 8192 8 8042 12917 476637 458497 8192 16 17518 20161 657932 566172 8192 32 20216 24210 517171 464290 8192 64 22203 31954 631035 567200 8192 128 21490 37385 437275 793567 8192 256 33726 49113 809153 247372 8192 512 38928 68317 477558 617616 16384 4 6900 6677 224343 354571 16384 8 9336 10663 427972 311317 16384 16 15453 18071 461106 274650 16384 32 17479 28710 919265 632148 16384 64 21925 33370 612419 528518 16384 128 26977 40386 372975 464017 16384 256 30365 39573 878880 525869 16384 512 32956 51680 934046 932702 32768 4 5028 6391 183770 228638 32768 8 9494 8655 204615 448306 32768 16