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 Mar 26 08:48:39 2026 Auto Mode Machine = Linux oleg413-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-oleg413-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 2531 6741 500060 610350 64 8 6937 43543 799377 754443 64 16 3147 30581 1105556 763021 64 32 7664 48596 955947 1143223 64 64 6557 67738 2662899 2561267 128 4 4952 17526 643108 542400 128 8 10922 18076 914904 731625 128 16 8318 42035 962469 218435 128 32 15083 30629 1406136 1123617 128 64 13802 56484 2132084 1254941 128 128 10625 59422 1508887 1939522 256 4 8730 8870 599585 560172 256 8 20643 36913 552960 768712 256 16 18982 61304 727070 807442 256 32 19722 32012 1274008 596587 256 64 12244 84801 1340826 1570244 256 128 18548 104319 1415041 1479379 256 256 22010 105570 1673001 1790149 512 4 9008 8200 189626 458295 512 8 12233 20972 1091863 587096 512 16 23067 43423 501888 658978 512 32 27069 67182 1040545 693899 512 64 33977 59039 1216149 914287 512 128 28076 86470 1518938 715159 512 256 17335 106756 1684557 1350783 512 512 34836 57207 1299295 853257 1024 4 8899 8994 350930 691865 1024 8 21650 24220 1015885 1105865 1024 16 19457 18702 794510 1630707 1024 32 26772 70451 560788 721624 1024 64 28099 77929 1383774 613583 1024 128 19677 71125 1304745 1109579 1024 256 40196 117754 2124322 1984913 1024 512 85526 180409 2311849 2245375 2048 4 8881 12664 508045 204698 2048 8 19268 12416 879773 513665 2048 16 32202 37251 1497076 465659 2048 32 44673 48965 780136 959682 2048 64 54588 76750 742315 860817 2048 128 36845 51055 342531 992275 2048 256 50906 90663 916376 1997749 2048 512 66541 95562 1045919 1528510 4096 4 12188 11920 870933 552624 4096 8 12095 19518 1085903 516380 4096 16 31874 31660 594236 781691 4096 32 31879 46053 1097838 510215 4096 64 53647 80993 1269685 1544007 4096 128 41794 109974 1326445 1597561 4096 256 53627 63204 738671 550322 4096 512 38340 61090 1791845 1501368 8192 4 12469 9366 265862 557093 8192 8 16717 15881 596556 564971 8192 16 25548 33951 459706 763112 8192 32 26995 43767 880752 716592 8192 64 31381 66242 1350894 1121298 8192 128 44064 52501 1253556 821830 8192 256 31569 39581 936569 1171455 8192 512 46549 53340 524353 520753 16384 4 9111 11967 235041 262538 16384 8 19297 22501 395863 379092 16384 16 23359 25953 538364 414440 16384 32 36933 36518 762466 884434 16384 64 37523 42866 655646 584350 16384 128 37002 40155 691838 610200 16384 256 43712 70412 677641 779257 16384 512 45697 55693 961167 485884 32768 4 10400 9313 291904 305879 32768 8 12569 15126 432330 486794 32768 16 20977 26279 722352 552776 32768 32 29535 34625 577043 492448 32768 64 33636 48243 1098493 977358 32768 128 40410 58346 1014273 422529 32768 256 40658 61149 989076 1221052 32768 512 54279 50848 942965 596855 65536 4 11508 11713 306137 317231 65536 8 16811 16701 524137 416006 65536 16