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: Wed Aug 26 21:20:26 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 2507 3619 576282 519412 64 8 4057 4040 395452 695778 64 16 3612 24864 566551 571375 64 32 2170 37824 1232453 939223 64 64 2582 32018 1553394 1562436 128 4 6080 9865 292126 547377 128 8 2941 18741 653282 711270 128 16 7004 32762 1076312 901083 128 32 10178 30146 1152564 397444 128 64 4864 94257 1455701 907174 128 128 12830 66388 1114289 1424795 256 4 7624 8007 355566 59343 256 8 6111 16390 539892 721210 256 16 16723 36861 713541 868157 256 32 7259 20181 633548 965763 256 64 16433 90239 1230218 1437779 256 128 15225 67672 1208072 393195 256 256 5268 114791 1579483 531343 512 4 6597 8535 540137 300649 512 8 9889 7900 767559 357746 512 16 5995 27650 670919 761841 512 32 24071 88982 619084 186449 512 64 16373 35824 603767 1139970 512 128 31337 17643 663252 992456 512 256 34555 42525 1600443 1580419 512 512 22619 113450 941133 2178404 1024 4 5433 8979 187546 520803 1024 8 10830 17232 409442 570168 1024 16 9211 17725 236483 286105 1024 32 18535 20482 1098511 1080275 1024 64 17255 57615 931702 485098 1024 128 22020 61768 533615 415261 1024 256 21459 39232 1503415 1345623 1024 512 46066 90139 1514549 695112 2048 4 6591 4479 528227 204148 2048 8 11990 19167 315275 138360 2048 16 15754 19122 512104 411833 2048 32 8861 29672 808555 1050781 2048 64 29160 35971 1107548 567786 2048 128 26345 68520 1310279 756835 2048 256 31846 51671 1572727 606299 2048 512 28098 37321 151098 300118 4096 4 4363 6152 173957 139466 4096 8 6910 9300 306057 299088 4096 16 17490 20652 385295 356083 4096 32 20794 26088 454159 437505 4096 64 24962 16495 531049 575601 4096 128 19878 43709 750710 501048 4096 256 38858 34396 1010592 610236 4096 512 19711 38280 365126 817084 8192 4 3715 5427 584063 415711 8192 8 11128 8601 514415 381288 8192 16 17965 18651 368509 275204 8192 32 12814 19772 334982 355912 8192 64 23244 19770 385489 433945 8192 128 22658 31921 667817 536864 8192 256 22964 37035 306781 266509 8192 512 29303 54858 715636 628036 16384 4 4235 3546 97946 140136 16384 8 9965 13687 489058 392346 16384 16 13928 16861 249091 164759 16384 32 17790 21651 297144 264470 16384 64 18585 33022 1182946 1194439 16384 128 28746 88166 676134 1368646 16384 256 27581 47684 1877796 725632 16384 512 24366 39414 1062111 487981 32768 4 5973 6876 202610 148033 32768 8