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 27 10:52:54 2026 Auto Mode Machine = Linux oleg207-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-oleg207-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 1706 4513 532815 397796 64 8 2156 15944 633392 581273 64 16 5848 42807 735831 576282 64 32 4653 25497 1210227 998622 64 64 3528 39263 503814 1638743 128 4 2680 9641 383258 557032 128 8 6824 25226 907174 826202 128 16 11445 23105 650117 711270 128 32 12697 41480 1391557 864797 128 64 4410 63177 1175271 1254941 128 128 4576 100466 609522 1939522 256 4 4192 6079 579209 45746 256 8 3983 18446 164010 706964 256 16 4973 11694 208663 616807 256 32 9825 48018 186581 880256 256 64 11467 85907 1340826 1175022 256 128 11600 68032 1415041 980760 256 256 18028 30330 1673001 2034350 512 4 6158 5736 744153 198605 512 8 6594 5802 753025 273676 512 16 14412 22060 502946 489979 512 32 11179 20191 1168504 242193 512 64 13135 21720 1286838 1164070 512 128 33396 35612 1483267 915847 512 256 12005 88871 294425 1655979 512 512 30638 100350 1524329 1933266 1024 4 4777 5612 303149 119567 1024 8 6090 8772 333542 515119 1024 16 9540 21088 433318 379688 1024 32 22289 12277 500473 426138 1024 64 26408 51832 922497 759659 1024 128 14230 39501 1333093 794363 1024 256 39218 42897 778101 407964 1024 512 42558 71409 788819 1195102 2048 4 6544 4945 382526 307367 2048 8 10868 16047 499623 776399 2048 16 23534 16254 1129094 967792 2048 32 14581 32827 685395 1411470 2048 64 25226 38831 811074 390384 2048 128 17979 46894 1378181 518346 2048 256 18547 38097 1490582 564651 2048 512 34196 68078 808174 520987 4096 4 6124 6389 285736 208428 4096 8 9322 12483 377365 517687 4096 16 16660 31721 762471 364028 4096 32 23761 22873 600677 836255 4096 64 26937 58227 577148 1243493 4096 128 19291 28321 265285 564202 4096 256 28640 41917 790285 1503602 4096 512 42466 75396 2024780 821657 8192 4 5429 6709 152477 211226 8192 8 8818 12775 649021 394586 8192 16 16947 23082 800072 535809 8192 32 22549 27139 948592 353954 8192 64 27627 33171 1244611 1197128 8192 128 32604 45721 1096500 464635 8192 256 35025 37816 434939 454633 8192 512 38744 72234 1097236 493640 16384 4 6537 5619 457767 230131 16384 8 9638 11760 489996 471224 16384 16 13492 21042 447308 582231 16384 32 15559 26801 479667 459475 16384 64 22609 38051 534637 477527 16384 128 32512 38724 716493 607444 16384 256 41328 47470 1023360 1225430 16384 512 35579 53817 978731 564520 32768 4 6000 6172 464372 435253 32768 8 12696 13831 417836 309725 32768 16 15962 15502 636147 276327