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: Sat Aug 29 06:10:50 2026 Auto Mode Machine = Linux oleg655-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-oleg655-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 3784 2716 150569 560635 64 8 5123 5340 866463 842003 64 16 6764 16827 633392 99390 64 32 5340 48412 1310683 1083249 64 64 3810 88891 1336792 821391 128 4 6282 9369 715059 127498 128 8 5333 6051 969421 767171 128 16 8797 19671 1162547 649331 128 32 16978 54633 1455701 624409 128 64 15030 76555 1162547 1391557 128 128 18540 77573 1332828 1911894 256 4 11891 11637 525621 344500 256 8 11204 15861 904732 176666 256 16 12822 30053 1206714 1012194 256 32 21951 38912 1206714 1122215 256 64 14644 60911 1114064 744204 256 128 15090 32478 1384034 1619994 256 256 21846 52686 1629830 2228578 512 4 7585 7517 424168 258583 512 8 16283 25424 643189 491887 512 16 27924 34545 1255246 1009722 512 32 26849 42627 1402845 656360 512 64 24621 35027 292580 1055894 512 128 21055 41447 1066910 1556366 512 256 19811 38510 1729323 1827947 512 512 43596 125983 1117430 622133 1024 4 6487 8592 223582 409598 1024 8 8556 21391 562919 541486 1024 16 11762 41614 1033486 358427 1024 32 30925 40941 808265 612446 1024 64 36527 63732 1251882 909410 1024 128 41893 40359 1472995 1468964 1024 256 24357 38439 990352 1678504 1024 512 48434 52359 1837965 460843 2048 4 9401 10338 245154 132206 2048 8 9978 11883 635829 823515 2048 16 12504 21584 492660 646890 2048 32 22573 66013 418127 559138 2048 64 30403 74728 1071624 1032220 2048 128 38466 49984 1581705 1127168 2048 256 56254 138895 1521471 1153815 2048 512 83828 153362 1830447 1130283 4096 4 16487 18921 315025 226462 4096 8 14440 13955 372400 451997 4096 16 20591 36672 418808 672249 4096 32 23412 38498 1057560 325593 4096 64 25016 63258 965388 615836 4096 128 38646 81047 1126563 916366 4096 256 50614 49288 1303202 839688 4096 512 36145 59857 974312 569987 8192 4 11519 9614 289530 325426 8192 8 12536 17553 550797 424919 8192 16 26842 20878 859620 621122 8192 32 31376 37176 685128 346386 8192 64 35967 60486 934734 883129 8192 128 38746 47629 1164626 1042758 8192 256 56196 74446 1074655 808525 8192 512 53910 81164 822577 1074655 16384 4 8603 10771 324358 263586 16384 8 16009 17816 407379 444226 16384 16 23222 29547 460688 329148 16384 32 28051 37933 1146704 616446 16384 64 39448 69895 687361 695240 16384 128 40174 65046 577533 854934 16384 256 39029 66483 1283305 657226 16384 512 47112 67853 743107 584390 32768 4 8464 10246 384150 276492 32768 8 14292 14248 395619 329247 32768 16 19503 24681 1181256 389886 32768 32 30022 41678 862563 635001 32768 64 29916 44422 988564 597467 32768 128 38299 45170 877863 423808 32768 256 44281 58058 917275 1089360 32768 512 52156 85194 687350 429034 65536 4