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: Tue Aug 25 21:28:19 2026 Auto Mode Machine = Linux oleg648-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-oleg648-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 6516 15062 217567 488236 64 8 4425 10966 125742 640954 64 16 6332 19869 32114 889431 64 32 3119 61783 115119 939223 64 64 3624 29518 1518251 1828508 128 4 3646 7031 640042 383258 128 8 6616 21135 908709 576161 128 16 9475 35545 1598754 80601 128 32 7115 72229 1359835 1121270 128 64 11733 76928 976473 1217930 128 128 4595 27782 800337 1663139 256 4 5910 5484 123081 527687 256 8 12556 25775 296302 910872 256 16 11097 18468 1015065 1093639 256 32 13564 27133 1391207 1180188 256 64 13480 61360 195410 478536 256 128 22802 83140 1471270 1649865 256 256 9641 64158 1266495 1938842 512 4 11722 7386 375906 462540 512 8 9973 13946 245348 497585 512 16 16221 30690 746481 258583 512 32 20941 58845 1207940 172866 512 64 23588 53980 639359 911184 512 128 22904 122812 1527582 977103 512 256 23490 58856 1410215 2815243 512 512 23634 109237 1689859 2141475 1024 4 6652 8639 284193 598117 1024 8 16756 16753 636027 791435 1024 16 20416 22506 1130312 278409 1024 32 19132 72016 1203137 1117955 1024 64 26055 35085 616490 259894 1024 128 41939 93243 884319 1404591 1024 256 23485 122605 1523683 991266 1024 512 27787 42287 1047091 1098511 2048 4 5538 7485 316145 275824 2048 8 10013 17022 560781 426134 2048 16 17873 24087 1219848 383876 2048 32 25717 36194 623823 428729 2048 64 29405 51183 1464907 803713 2048 128 39275 64503 1312882 1412398 2048 256 39035 62937 1767183 464275 2048 512 21404 60735 509069 405457 4096 4 7254 7868 308270 363442 4096 8 14918 10678 538101 195606 4096 16 16070 19401 375091 743240 4096 32 24526 40320 987189 484967 4096 64 32919 41152 839360 481825 4096 128 38920 41395 717717 556526 4096 256 37965 58480 1781625 549565 4096 512 40172 66321 541937 437371 8192 4 8768 10399 238263 407217 8192 8 18141 19581 651668 419349 8192 16 24795 40761 1173135 505054 8192 32 35498 31597 596908 1021067 8192 64 22376 44276 960713 917978 8192 128 31040 44771 552613 686785 8192 256 26313 39353 994412 340452 8192 512 42137 84226 996344 867608 16384 4 7222 10567 474910 228654 16384 8 18029 12415 562947 450966 16384 16 20304 23470 601890 421202 16384 32 25264 41077 581079 508408 16384 64 25990 40319 962972 567199 16384 128 44539 51446 881382 622161 16384 256 32356 58166 1149101 686016 16384 512 36477 63883 1103682 975937 32768 4 9226 9949 439349 350029 32768 8 13211 16281 577817 448268 32768 16 20177 24649 604675 590551 32768 32 25373 38362 978583 507518 32768 64 26849 40819 676493 583955 32768 128 29713 51149 462387 662101 32768 256 37413 56005 979462 547428 32768 512 47948 60036 789820 606669 65536 4