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 Sep 5 03:43:14 2026 Auto Mode Machine = Linux oleg127-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-oleg127-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 7597 7619 188269 571375 64 8 6563 31889 831569 474430 64 16 9686 37403 488236 983980 64 32 8607 78609 1679761 1484662 64 64 1672 120062 1947927 2772930 128 4 2378 7270 601330 549056 128 8 3549 12973 699227 743788 128 16 7891 13073 1102844 934004 128 32 11057 46527 983630 1102844 128 64 7982 58287 1165070 1436229 128 128 8497 66429 1278855 1377278 256 4 3659 5320 626159 359134 256 8 4795 9157 378237 606700 256 16 4733 29087 847597 714967 256 32 5827 30415 421107 171914 256 64 9666 39894 1062263 1132871 256 128 11323 21566 618584 1231629 256 256 26828 103345 1495866 248332 512 4 11466 11712 363130 519367 512 8 27072 22721 663252 227251 512 16 13270 33653 263760 1185272 512 32 25296 28273 1213400 1057974 512 64 39339 28635 1406520 1282994 512 128 30158 97764 538377 1079785 512 256 28848 107428 1645826 1219602 512 512 29924 109076 1619757 2169601 1024 4 5119 6910 675436 303685 1024 8 17726 44204 846998 173178 1024 16 20347 34734 445406 885048 1024 32 38974 55252 1729884 1528563 1024 64 31833 83469 1954207 930088 1024 128 44252 74646 1247157 1319577 1024 256 86860 97015 1114474 1146607 1024 512 62439 41035 1075676 1073257 2048 4 6490 12170 433270 423049 2048 8 12761 22667 952130 654929 2048 16 15247 25723 1163663 406743 2048 32 23278 45069 746898 1155057 2048 64 30449 46832 734634 697302 2048 128 38819 51085 872978 383602 2048 256 41768 73263 684031 868125 2048 512 33380 38599 735640 432702 4096 4 8632 5776 249378 376538 4096 8 17658 31873 1168952 409270 4096 16 23265 26466 746081 994907 4096 32 24060 31756 1358972 416382 4096 64 31212 49012 1451394 1366756 4096 128 38051 50634 1841001 942250 4096 256 37939 101496 1290089 1521445 4096 512 32716 71250 772691 405149 8192 4 2443 9618 277054 247073 8192 8 12195 9760 190281 322800 8192 16 14822 23294 434499 258235 8192 32 23922 41666 852264 517631 8192 64 32113 52775 701365 420838 8192 128 41569 58658 1134928 551726 8192 256 72786 70065 1342764 1028771 8192 512 53526 55507 751692 659371 16384 4 7805 7544 240813 256581 16384 8 11464 12343 370737 234475 16384 16 21752 21625 755476 595438 16384 32 29242 38936 939666 773521 16384 64 36663 34750 850501 646006 16384 128 39432 44594 826344 966888 16384 256 34242 65667 1644289 1199506 16384 512 38379 54080 1801447 835578 32768 4 6836 7416 407749 358538 32768 8 13512 13191 376401 296572 32768 16 15009 23790 721665 654587 32768 32 19604 27740 1047139 710463 32768 64 27439 29333 1274863 1294203 32768 128 30534 42332 777322 399687 32768 256 22627 45792 1532945 843925 32768 512