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 13 09:38:14 2026 Auto Mode Machine = Linux oleg305-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-oleg305-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 4 849 2320 633392 492717 64 8 2236 15321 666414 754443 64 16 2775 4262 633392 99354 64 32 1828 12163 1143223 576282 64 64 2770 43185 1562436 2467108 128 4 3590 2097 513847 421139 128 8 2194 8397 747933 576780 128 16 3460 16225 633247 406164 128 32 1300 56165 1254941 1093856 128 64 4917 24884 1229084 126002 128 128 10986 54263 1508887 1852520 256 4 2254 5125 451568 215316 256 8 3366 7444 106313 727563 256 16 3567 10527 741633 780445 256 32 5140 9722 1093639 941213 256 64 14242 29217 479390 554101 256 128 4073 93909 1523457 323240 256 256 5295 109177 1763685 879535 512 4 3769 1726 558977 259614 512 8 5318 6618 525724 749608 512 16 7961 13867 565156 509388 512 32 13710 33158 722133 416275 512 64 12709 60327 1153441 503418 512 128 22509 93260 2047551 503890 512 256 13711 38237 574069 616950 512 512 23904 87017 394482 2132967 1024 4 2743 3032 114578 153157 1024 8 3146 3942 224857 164207 1024 16 4946 13026 320596 297851 1024 32 7059 16995 946485 207198 1024 64 27085 53355 663642 465487 1024 128 35691 80415 1458489 741559 1024 256 26976 26829 278120 740408 1024 512 23830 51840 664875 1109579 2048 4 4381 7725 233925 241366 2048 8 6941 5761 395597 329687 2048 16 10457 28554 582652 274712 2048 32 21180 26160 562175 150709 2048 64 27426 70620 888509 236053 2048 128 34970 66023 1134613 555450 2048 256 16298 25676 1684034 635829 2048 512 15774 23192 1411470 835937 4096 4 9764 10182 355736 483534 4096 8 8121 4652 646983 195066 4096 16 12155 12025 787243 842984 4096 32 1343 18981 438779 679051 4096 64 20448 53447 1324196 335080 4096 128 23928 69936 780059 683237 4096 256 40157 41151 738829 668950 4096 512 47706 52412 524996 535986 8192 4 5999 8183 210840 594101 8192 8 9334 10136 516945 460686 8192 16 15446 18088 754747 338780 8192 32 24170 22978 528174 531984 8192 64 22495 21847 809649 583517 8192 128 26858 36499 537040 1013238 8192 256 29431 37026 817975 572549 8192 512 25635 35963 878972 432596 16384 4 6015 6962 308928 242916 16384 8 9633 10507 389482 421833 16384 16 14425 14564 695331 675935 16384 32 17381 20922 774584 807174 16384 64 22541 39368 1060587 423423 16384 128 31078 30029 818305 737619 16384 256 26605 33279 532623 377964 16384 512 31280 44706 736987 391510 32768 4 5138 7918 234712 267114 32768 8 11185 10668 336402 427948 32768 16 14818 18990 911412 793143 32768 32