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 18:36:15 2026 Auto Mode Machine = Linux oleg411-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-oleg411-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 2065 1958 500060 470274 64 8 3743 16571 174784 153496 64 16 1908 41477 926260 557144 64 32 4933 25558 1083249 831569 64 64 4888 71758 1029254 1648808 128 4 4044 11498 531131 343310 128 8 6044 6835 805138 180837 128 16 6650 22145 774922 695603 128 32 14648 55554 1067750 1007629 128 64 4189 23434 1152564 762811 128 128 4438 42895 1642783 1579934 256 4 3816 8870 545931 181044 256 8 9189 7268 234451 591005 256 16 10362 5071 355096 802614 256 32 12903 9337 633548 894929 256 64 10964 19922 1112909 1089202 256 128 5628 43769 1471270 1619994 256 256 14628 27856 1581810 2081678 512 4 5897 5999 103101 540002 512 8 10003 20613 785241 543968 512 16 15730 13662 733478 533297 512 32 9172 47985 1120344 1110496 512 64 32311 32046 687237 1007827 512 128 10918 49340 1600443 815353 512 256 26050 75040 1455126 1201856 512 512 28767 70592 102237 779258 1024 4 7434 5371 364542 169254 1024 8 9918 8060 205827 156912 1024 16 11207 15971 901394 479627 1024 32 21451 22837 111595 328115 1024 64 23401 20914 1258117 971534 1024 128 39890 41872 739771 480055 1024 256 12200 21678 1284839 185273 1024 512 26654 72541 1048113 709231 2048 4 6798 8948 318407 279931 2048 8 13282 16027 346189 219065 2048 16 7425 18897 358290 206972 2048 32 22375 37719 1091089 453490 2048 64 15131 19682 353338 946465 2048 128 21584 34910 385029 515763 2048 256 26196 33053 1351722 424198 2048 512 34749 30462 762207 778157 4096 4 1082 6003 418686 221524 4096 8 13625 14266 334806 452592 4096 16 13990 16196 371586 312101 4096 32 13867 29354 888914 579094 4096 64 24920 29607 464185 478057 4096 128 17932 27929 1621536 395059 4096 256 24174 45405 701854 935987 4096 512 36943 46196 289122 353256 8192 4 5280 5964 222071 325219 8192 8 11041 15717 330602 225308 8192 16 13415 21366 350442 179416 8192 32 18610 23676 280142 504127 8192 64 25588 27111 359329 618027 8192 128 27937 33349 676135 606004 8192 256 32288 36429 904398 320511 8192 512 37305 49667 1113341 881430 16384 4 5622 6227 216359 214751 16384 8 8990 12809 327203 245156 16384 16 11823 16894 535967 296725 16384 32 17927 27511 387145 425671 16384 64 20945 27937 536126 508883 16384 128 20923 42221 764103 761655 16384 256 31995 55431 969589 865312 16384 512 36836 65865 944976 592252 32768 4 6190 6208 186798 237795 32768 8