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 Apr 9 15:42:41 2026 Auto Mode Machine = Linux oleg612-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-oleg612-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 3570 5535 614542 560635 64 8 4150 29360 789967 681644 64 16 4576 28867 1124074 1049372 64 32 3429 33971 1101022 254971 64 64 2856 88161 1304314 1879725 128 4 3172 7380 650117 539674 128 8 8354 16007 843068 726674 128 16 9014 36792 447464 670413 128 32 15912 6991 659704 1076312 128 64 8349 49766 1102844 1281909 128 128 10859 34353 1040839 1827299 256 4 4859 8875 222407 629094 256 8 12486 12461 820398 86544 256 16 14474 30121 921029 603630 256 32 19266 51447 294272 1071806 256 64 13273 104482 1180188 142864 256 128 19936 74185 1437779 1534342 256 256 25343 98909 1455317 2061693 512 4 5760 9996 337029 262534 512 8 10033 6038 867738 815044 512 16 14800 19747 1190529 186109 512 32 6638 34877 569502 502946 512 64 18201 33170 1372364 1020276 512 128 13831 28814 953248 867738 512 256 33979 60334 977103 847867 512 512 16718 35011 1120344 2244430 1024 4 9747 9062 100578 121747 1024 8 7135 13476 799985 891292 1024 16 20716 20929 1155553 600291 1024 32 24337 45616 588528 1074599 1024 64 20013 54020 1420384 410930 1024 128 26067 64297 788819 728725 1024 256 32201 64696 278337 974400 1024 512 25470 57161 1558516 1712639 2048 4 5137 5243 319949 213734 2048 8 11176 7524 368733 144551 2048 16 16401 13922 230343 270653 2048 32 19421 26404 620220 317032 2048 64 29964 38042 1357919 909873 2048 128 41435 59509 1565847 880133 2048 256 25372 37594 654281 178381 2048 512 21290 26859 1248935 630509 4096 4 4110 5756 175176 185752 4096 8 6373 9830 462560 437093 4096 16 9472 20820 722790 464712 4096 32 1365 23040 556364 529869 4096 64 20674 22730 231401 262212 4096 128 12998 35903 447359 390471 4096 256 26095 78820 769197 854770 4096 512 33926 44265 812678 1223392 8192 4 5105 5715 161428 156911 8192 8 9083 9173 292371 402198 8192 16 14651 18710 909208 419738 8192 32 20610 19206 584888 478415 8192 64 28802 44239 513830 502233 8192 128 31907 38226 561977 704211 8192 256 29570 55501 546096 507710 8192 512 25621 52942 936543 330284 16384 4 4879 5761 242119 169473 16384 8 9383 10041 263015 353401 16384 16 12387 16789 658599 441758 16384 32 19446 28033 940154 495090 16384 64 24870 46678 455820 464330 16384 128 30315 52899 327405 551982 16384 256 32647 33233 643243 768486 16384 512 39746 55825 872563 522634 32768 4 5459 6701 402095 234413 32768 8