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 Oct 2 16:30:53 2026 Auto Mode Machine = Linux oleg129-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-oleg129-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 1846 10885 673098 645579 64 8 5374 28636 929467 1163036 64 16 3556 9534 1124074 1017549 64 32 1702 8168 1033216 1562436 64 64 2873 19365 279385 11828 128 4 5643 18451 637004 609522 128 8 7868 12000 948860 1281909 128 16 7159 28855 1074159 983630 128 32 7877 32048 1231904 1152564 128 64 13542 96389 1539168 1196221 128 128 5181 92217 1508887 1802755 256 4 5276 2834 559005 517265 256 8 2189 20928 933846 519266 256 16 5333 15547 1153561 746272 256 32 7885 53455 1248819 1079348 256 64 12866 57221 1126926 1248819 256 128 8690 32900 1588832 1128110 256 256 19174 102811 1729594 1471270 512 4 11546 6171 540681 927716 512 8 7638 27202 1261144 1122687 512 16 5961 26681 1258188 1010197 512 32 18042 42450 787834 1091863 512 64 13637 23962 625941 1677976 512 128 25854 68984 1712772 1273106 512 256 39844 93908 2357784 2275345 512 512 39906 45458 1542947 2073249 1024 4 11490 13949 967813 542992 1024 8 19257 15771 913471 525905 1024 16 18861 17438 771116 328391 1024 32 11434 19466 916786 572066 1024 64 27126 20131 1256644 983548 1024 128 17479 32581 1546729 1389594 1024 256 20378 76601 1003073 555637 1024 512 17619 47039 1057924 447354 2048 4 4589 4951 222267 73759 2048 8 6886 10172 526769 1033835 2048 16 10688 15726 199063 256962 2048 32 17991 26609 1271112 442237 2048 64 18221 40137 1023000 1023487 2048 128 22415 35945 978931 1376414 2048 256 30870 32532 922081 736460 2048 512 26859 45107 493594 1608961 4096 4 4195 4723 356763 189498 4096 8 6239 8342 356607 194602 4096 16 8819 11198 445214 347006 4096 32 8462 20326 810608 621450 4096 64 41841 59386 1520503 717208 4096 128 50189 97691 1304489 1246199 4096 256 46207 50484 377299 649748 4096 512 48062 93569 176582 1505842 8192 4 10642 12442 221560 449118 8192 8 9278 1700 367881 319091 8192 16 13439 11533 782792 469024 8192 32 26913 27060 347869 379034 8192 64 18584 30244 900133 857261 8192 128 27344 47517 1086068 855639 8192 256 44344 56076 659485 801565 8192 512 39530 43623 696714 686318 16384 4 4881 4935 99820 160408 16384 8 10255 9417 432524 292712 16384 16 13765 15679 333029 306971 16384 32 19849 19807 424895 417405 16384 64 17755 29276 642029 655177 16384 128 29877 37596 699244 586439 16384 256 39924 57167 1200994 1552708 16384 512 43065 56747 836381 760736 32768 4 7840 6067 329253 253287 32768 8 7918 9659 709696 525844 32768 16 17667 20959 614140 574796 32768 32 17991 20175 510396 523575 32768 64 33819 33749 927039 711157 32768 128