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 Sep 10 10:22:30 2026 Auto Mode Machine = Linux oleg426-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-oleg426-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 5204 9304 131405 460591 64 8 3975 14260 561808 270108 64 16 2570 44021 901377 901377 64 32 1701 43628 240575 889431 64 64 3982 55418 576282 1385075 128 4 5519 7839 346859 79597 128 8 6902 15471 621518 297632 128 16 5855 37747 1057236 819893 128 32 11645 73991 1231904 1040839 128 64 5834 23795 901083 1406136 128 128 6813 67908 1557024 230238 256 4 6053 5470 280364 335984 256 8 6967 6404 635423 266980 256 16 7974 18264 252656 766517 256 32 3796 16565 1376935 193056 256 64 16373 37925 581719 920240 256 128 18084 63539 1463250 1304976 256 256 19597 110061 815414 1729594 512 4 5238 7724 383766 308821 512 8 8673 10053 113853 222311 512 16 5280 24230 306223 487089 512 32 10954 29368 608903 864942 512 64 27447 49631 1496706 759685 512 128 31292 94292 681566 1524329 512 256 29788 73183 1171691 1168504 512 512 11651 25157 949875 157108 1024 4 7022 4309 234584 505658 1024 8 6750 10237 735590 320811 1024 16 13727 30554 1062110 905384 1024 32 15356 51460 1145383 1147832 1024 64 33322 29291 886692 654740 1024 128 22241 62960 1047091 905384 1024 256 28229 68421 649296 367568 1024 512 31228 53770 1289467 1416169 2048 4 5116 6605 200864 163921 2048 8 7172 9626 266628 184022 2048 16 10843 13563 956157 217710 2048 32 15361 32425 595208 1121576 2048 64 28525 37871 752130 1061690 2048 128 30310 61121 855502 387513 2048 256 32467 52928 528520 742315 2048 512 28982 47011 751603 736713 4096 4 7923 12319 280855 174231 4096 8 11567 11025 484270 368083 4096 16 15810 18017 286212 639398 4096 32 25124 25078 693889 499940 4096 64 18319 27901 379994 376571 4096 128 17313 30392 866147 795961 4096 256 27932 54992 1605024 769921 4096 512 36823 54743 1763882 1112699 8192 4 8320 6598 174012 212519 8192 8 9793 7710 427759 331447 8192 16 8518 16393 603725 573878 8192 32 22196 27963 438285 644070 8192 64 24872 34515 895395 400272 8192 128 31862 47448 444660 738683 8192 256 24808 51833 872145 697195 8192 512 27599 42768 245490 270230 16384 4 5104 7015 243360 559391 16384 8 11281 11515 409098 270462 16384 16 14114 14743 327943 239263 16384 32 24695 30675 339369 412985 16384 64 21473 29374 914226 716643 16384 128 32176 45058 1140954 1104108 16384 256 37660 57649 969056 895591 16384 512 35906 51797 555749 581384 32768 4 6169 6055 187084 159754 32768 8