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: Fri Jan 30 01:51:25 2026 Auto Mode Machine = Linux oleg202-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-oleg202-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 3157 6122 67449 51278 64 8 3408 5342 192868 280553 64 16 1590 6326 27898 432398 64 32 3907 36532 438759 1049372 64 64 8000 8728 955947 1083249 128 4 7216 7250 142526 42009 128 8 4826 13612 280671 116563 128 16 2970 32870 364770 180533 128 32 4550 44506 561694 518312 128 64 7361 43185 934004 231030 128 128 10297 77160 1185654 1455701 256 4 6366 11686 56537 33428 256 8 5804 9140 44298 131896 256 16 10372 29599 328180 123307 256 32 11214 28893 649647 487664 256 64 14026 14274 104400 516270 256 128 17162 51221 1248819 448175 256 256 17014 77460 1272498 1497953 512 4 6884 5991 74279 22332 512 8 8612 5366 72540 216571 512 16 8388 17300 437208 378157 512 32 6319 35510 255233 223491 512 64 16103 55895 875164 369440 512 128 19413 44916 516122 506863 512 256 14753 25351 531712 1947291 512 512 24864 40550 1523247 2055390 1024 4 4544 3447 38710 42530 1024 8 12314 9753 110869 57700 1024 16 12577 20883 128082 231462 1024 32 21856 32807 281235 587884 1024 64 21619 46107 462679 413104 1024 128 27027 60513 337288 451683 1024 256 12184 27126 640867 363401 1024 512 26242 32472 210271 446193 2048 4 6431 4674 44172 71086 2048 8 11888 8703 179114 126154 2048 16 8429 23883 231068 241250 2048 32 27320 37612 375437 331557 2048 64 27253 42865 472212 210353 2048 128 22989 59494 600744 268386 2048 256 33370 42913 488903 1299574 2048 512 41612 63297 483591 369876 4096 4 4750 4591 66407 29503 4096 8 7959 10036 109102 111775 4096 16 14933 14070 171266 201912 4096 32 13725 22569 179847 170459 4096 64 29950 21783 397785 364545 4096 128 31929 29674 445607 351889 4096 256 43516 52587 619277 577964 4096 512 23109 68712 553728 135115 8192 4 1787 5510 71462 40688 8192 8 13247 14461 147712 113787 8192 16 19150 26234 173816 265388 8192 32 17868 19382 132167 273713 8192 64 24985 36524 710134 778923 8192 128 40096 34980 589271 289613 8192 256 37704 49478 951008 621021 8192 512 31551 46045 1217791 655459 16384 4 5376 5725 44449 68169 16384 8 8572 10693 89055 70754 16384 16 12085 17645 179923 141774 16384 32 21248 19498 283406 158422 16384 64 23882 29946 352465 556880 16384 128 28371 41183 662402 841234 16384 256 26455 44459 935967 785089 16384 512 37234 51332 973545 514996 32768 4 5464 6381 67321 70685 32768 8 9440 9505 96938 100092 32768 16 15732 17071 141046 122075 32768 32