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 Jul 30 02:42:46 2026 Auto Mode Machine = Linux oleg327-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-oleg327-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 1304 5744 571375 571375 64 8 2938 15670 592827 679917 64 16 5575 12650 735831 340306 64 32 3819 44319 1210227 1105556 64 64 5409 45715 1119387 1648808 128 4 2400 3406 473930 426492 128 8 2836 11575 688467 378663 128 16 3845 8334 20911 921183 128 32 2433 18236 978253 1067750 128 64 3504 22634 429563 1539168 128 128 3930 77394 1521718 1911894 256 4 3384 2424 372593 577651 256 8 2433 7722 917880 252716 256 16 4123 10413 907792 126862 256 32 4305 18204 1237306 996229 256 64 8897 19905 1642294 1208072 256 128 6275 14501 1430119 1445521 256 256 9745 49363 1600674 1884399 512 4 2796 2207 644927 54144 512 8 2591 4976 666546 497585 512 16 6002 12027 668413 967855 512 32 5459 15938 1055894 1118011 512 64 8906 15079 1293037 164787 512 128 11264 33562 1190529 1286067 512 256 7152 24072 1524329 1668848 512 512 11611 35491 906185 1207261 1024 4 2770 5058 361717 318787 1024 8 5021 9826 783494 797460 1024 16 7113 7879 508171 127394 1024 32 7545 10949 105826 1084640 1024 64 7422 15409 332664 1156798 1024 128 18695 23838 653842 1265904 1024 256 13851 27540 1083546 1329791 1024 512 10765 16428 189457 761275 2048 4 1610 2300 141154 126076 2048 8 5808 3999 327262 180746 2048 16 4854 4992 257154 737219 2048 32 6843 11076 173840 310208 2048 64 13077 17597 1357275 169047 2048 128 500 62990 567786 1221930 2048 256 41481 15619 121955 356298 2048 512 14298 22019 1721151 1472188 4096 4 4213 3911 27788 175944 4096 8 8142 9806 364832 262701 4096 16 7373 9649 328494 412572 4096 32 9143 7863 315761 140906 4096 64 11297 11014 156444 276662 4096 128 9934 17206 253638 190095 4096 256 13194 19307 454195 297307 4096 512 23046 40923 1513137 454556 8192 4 4397 4432 370392 405262 8192 8 15003 16139 516549 323590 8192 16 20202 13358 258928 149743 8192 32 7000 6969 177135 199956 8192 64 13860 9236 206134 166291 8192 128 15651 24893 666405 408253 8192 256 10249 20582 888312 260858 8192 512 17854 17219 339255 198902 16384 4 7459 2287 103679 124559 16384 8 3387 4283 324480 468864 16384 16 11581 5736 225305 182089