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 Sep 8 08:17:30 2026 Auto Mode Machine = Linux oleg254-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-oleg254-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 4271 10972 608965 390278 64 8 4403 23563 415659 640954 64 16 2369 19542 969761 955947 64 32 4719 61655 2133730 727850 64 64 4516 41800 1249666 1526887 128 4 4272 5247 576161 228183 128 8 3304 12815 824932 250897 128 16 5151 26294 1093856 901083 128 32 12485 28971 1346196 1165070 128 64 7451 27826 1229084 895074 128 128 4057 28946 1175271 805138 256 4 2521 3073 262862 419626 256 8 3219 10987 823544 753077 256 16 9867 31023 711178 556687 256 32 14334 34496 1019886 649647 256 64 11435 45172 1036624 1248819 256 128 11407 70115 1532153 319204 256 256 12048 49229 1673001 1619994 512 4 5869 10557 574530 367543 512 8 7626 8022 291428 732478 512 16 7008 15633 391176 836636 512 32 15144 43996 912733 712076 512 64 17213 65624 685263 821907 512 128 12259 15283 92203 687237 512 256 17416 24545 1145443 1433753 512 512 14708 61413 131854 1497750 1024 4 3610 5898 637632 597784 1024 8 4851 4036 485976 437422 1024 16 8388 15568 520047 467362 1024 32 12856 19701 432794 1125277 1024 64 27455 48852 940269 1150600 1024 128 17968 69973 1333093 1352402 1024 256 25838 43528 459413 1475525 1024 512 19410 74886 290498 1085737 2048 4 5581 5470 642391 200944 2048 8 10201 7176 478713 520166 2048 16 15863 26041 1143524 459187 2048 32 26114 40646 463874 1066700 2048 64 38054 32092 319152 873688 2048 128 31237 60189 658949 568425 2048 256 43766 53543 940352 1399968 2048 512 40579 89284 897889 614453 4096 4 4759 5764 171869 356733 4096 8 6031 8329 402548 313245 4096 16 7262 10886 189567 274146 4096 32 9930 19812 892933 378487 4096 64 12052 40556 494145 454905 4096 128 20524 19541 223848 272359 4096 256 18447 42343 592842 336868 4096 512 24034 33238 329761 873724 8192 4 2092 6575 173662 286986 8192 8 9995 10860 261800 305670 8192 16 14016 17718 467334 450478 8192 32 16937 22171 354429 443839 8192 64 26331 35399 1078906 632138 8192 128 29659 45204 714090 451473 8192 256 27341 40281 899921 767544 8192 512 36636 46313 1214347 757042 16384 4 4677 4647 212632 214579 16384 8 7988 9687 501346 466527 16384 16 11351 17109 283346 275746 16384 32 11347 23367 754911 385523 16384 64 24395 35428 1688198 885630 16384 128 38534 33677 902555 1355632 16384 256 23154 61325 962743 683920 16384 512 32518 59187 1147815 602771 32768 4 6483 5652 169122 251498 32768 8 8774 10291 509348 340422 32768 16 14451 14568 686543 550584 32768 32