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 Sep 11 08:07:37 2026 Auto Mode Machine = Linux oleg256-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-oleg256-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 3206 6909 610350 450541 64 8 5111 39361 955947 831569 64 16 8375 64779 760859 780776 64 32 5643 69963 1232453 371894 64 64 8595 26790 1255511 1828508 128 4 2242 1874 621518 436904 128 8 4815 9039 290230 609522 128 16 10897 29479 1162547 377597 128 32 8282 40855 1332828 1067750 128 64 5109 102734 1254941 1451764 128 128 16913 126596 1231904 1000121 256 4 8243 8938 627256 185485 256 8 3214 23346 861885 686620 256 16 13530 17501 577962 794889 256 32 16154 78646 1089202 996229 256 64 10897 107915 1369908 1248819 256 128 21505 84216 1455317 1032636 256 256 13491 79086 368375 1871263 512 4 8348 7439 241839 237795 512 8 6224 18556 662230 173326 512 16 4003 8226 1071167 914287 512 32 28022 49079 1339827 750919 512 64 11120 43093 1060063 1279935 512 128 40515 47926 613951 1438555 512 256 21496 97974 1496706 1655979 512 512 8316 113853 1629590 2132967 1024 4 2319 6141 640389 215981 1024 8 14311 23107 854073 497056 1024 16 20289 33845 769320 639245 1024 32 39006 59122 1492445 1102459 1024 64 35587 61966 1207534 480754 1024 128 30128 29413 1193442 1298041 1024 256 53089 84212 1119120 842843 1024 512 47039 80814 1575091 315857 2048 4 7463 6936 209537 314928 2048 8 11821 18568 446095 525127 2048 16 23844 29027 671676 566550 2048 32 24898 23992 356357 1171598 2048 64 36468 59853 627836 664917 2048 128 40104 50170 1568134 417193 2048 256 35509 24973 432071 349073 2048 512 28205 41682 812071 759646 4096 4 6367 7383 195961 173567 4096 8 7976 11259 616388 330854 4096 16 9585 16079 517765 1046735 4096 32 18406 25955 654301 783474 4096 64 19624 37035 877652 759505 4096 128 18445 54114 1014890 1022197 4096 256 35048 32796 320449 744045 4096 512 41705 52228 1066952 518812 8192 4 6039 6304 433573 360354 8192 8 14740 10699 382783 378804 8192 16 16077 18746 1027571 706818 8192 32 24248 30283 488551 694826 8192 64 22124 20887 1057294 881430 8192 128 36707 54753 824650 660538 8192 256 32075 50851 550382 608569 8192 512 40226 41860 725152 506147 16384 4 6414 6086 349376 258627 16384 8 13518 13153 382250 259072 16384 16 17101 17406 669833 346333 16384 32 20850 27956 874373 577713 16384 64 25045 41006 663938 321860 16384 128 35634 48825 1022340 1228827 16384 256 30054 61938 1281200 692270 16384 512 38458 60906 1303732 960711 32768 4 6207 5979 232301 151438 32768 8 9614 11411 671778 511511 32768 16 18243 24715 791864 571938 32768 32 22651 34445 915229 823585 32768 64 23951 48557 585549 466648