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 Aug 14 11:29:52 2026 Auto Mode Machine = Linux oleg408-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-oleg408-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 1760 7363 577521 454354 64 8 1737 11097 218452 647135 64 16 1875 19289 852702 668072 64 32 2054 32256 1002351 645579 64 64 4253 44356 1163036 1638743 128 4 3199 9238 171589 235696 128 8 2539 8610 814915 722760 128 16 4323 25873 515822 354649 128 32 3925 25827 707520 300464 128 64 4983 32981 921183 1231904 128 128 3419 81482 1487977 1911894 256 4 2779 3435 459491 72375 256 8 9304 6085 797250 719277 256 16 7549 10786 985259 519266 256 32 6412 22709 941213 966633 256 64 10715 37192 1208072 1058076 256 128 11884 44329 1471270 901693 256 256 6918 45007 1142514 2049885 512 4 2720 4466 331207 284442 512 8 8724 16313 302045 362089 512 16 6979 11746 855978 492225 512 32 14362 15906 651383 230322 512 64 6332 23343 954944 988345 512 128 10962 29081 1293037 498509 512 256 10985 43537 1333173 971357 512 512 16861 68632 1199171 685482 1024 4 5721 6350 142340 311821 1024 8 8621 11850 408119 292915 1024 16 10857 8969 197880 235666 1024 32 7445 29477 797460 952573 1024 64 10326 43593 1148139 351648 1024 128 27558 38035 703308 510224 1024 256 30380 74477 1052480 1098511 1024 512 16080 44653 1546729 1440391 2048 4 3841 4205 287511 269405 2048 8 5454 7923 489237 292077 2048 16 12015 11727 454811 207287 2048 32 25461 12666 282528 935131 2048 64 29503 15315 532352 1073499 2048 128 24939 46815 1171598 1185831 2048 256 29572 53560 810768 207012 2048 512 33489 76667 540084 307180 4096 4 3477 4679 173294 131093 4096 8 7281 8054 190947 379851 4096 16 10224 11337 470903 436072 4096 32 11667 22034 666123 349989 4096 64 13567 19449 379055 398791 4096 128 18721 28732 304581 350653 4096 256 30659 36930 325827 519534 4096 512 19379 31526 561253 714078 8192 4 5563 4033 258986 357088 8192 8 7096 7234 250007 188360 8192 16 7698 16328 207103 320236 8192 32 11058 18174 589565 579101 8192 64 17775 25773 842030 599491 8192 128 17250 34420 546244 378628 8192 256 27737 30377 1120055 678097 8192 512 30171 38972 483158 536260 16384 4 5602 5514 188447 242127 16384 8 8877 8571 485568 271784 16384 16 12007 13987 480875 542894 16384 32 22360 25121 345720 386973 16384 64 20878 31127 502207 271964 16384 128 19042 29773 1159924 848076 16384 256 24774 34100 560806 663156 16384 512 34059 54899 746554 570433 32768 4 4775 5787 240933 343393 32768 8