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 12 00:15:27 2026 Auto Mode Machine = Linux oleg441-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-oleg441-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 4464 3504 470274 640954 64 8 4530 6691 842003 681644 64 16 9094 26811 551422 913649 64 32 4828 69116 1204796 359444 64 64 4602 20233 1330167 1183548 128 4 5761 7608 699227 490380 128 8 6095 24763 914904 443033 128 16 4646 29976 870405 196023 128 32 8881 55053 670413 857887 128 64 4928 100072 1421023 1243315 128 128 5354 27550 1543594 1732927 256 4 9512 14027 69851 557554 256 8 10156 24075 864661 395659 256 16 14064 32245 1084800 886067 256 32 15233 57093 1036624 977189 256 64 15096 31173 1202660 966633 256 128 15965 74334 1008392 1497953 256 256 25266 69319 1300235 1391207 512 4 10306 13770 396594 111936 512 8 12716 17112 888930 346882 512 16 18887 26486 872320 616950 512 32 32728 33997 1249404 1023680 512 64 32881 55035 1032044 795127 512 128 18918 82317 1225169 315120 512 256 37336 106270 1303238 1667552 512 512 24171 128902 778128 1821745 1024 4 10724 7702 296126 542924 1024 8 14256 10991 176640 231724 1024 16 13658 30304 460053 717645 1024 32 30021 20272 868405 904621 1024 64 41840 52003 1030263 584444 1024 128 36976 81127 1278718 1380217 1024 256 29311 61560 849848 1462960 1024 512 43113 92387 1056623 1622698 2048 4 8695 10612 184389 340198 2048 8 16902 18038 351890 437039 2048 16 15243 27843 1119092 970635 2048 32 18993 50998 1288076 420460 2048 64 35948 42417 423236 538661 2048 128 32587 50040 612437 1160989 2048 256 32915 90792 1071090 648110 2048 512 42342 72789 889982 457646 4096 4 7910 7600 479619 367218 4096 8 13234 19320 749793 382235 4096 16 24242 28293 891589 444730 4096 32 30878 52552 810302 457144 4096 64 52803 59642 553282 994159 4096 128 32799 90748 1122514 596133 4096 256 47691 79609 922072 1163963 4096 512 40711 62722 672249 660642 8192 4 10470 11089 450602 325985 8192 8 15690 16447 398693 462640 8192 16 25061 31718 620695 743237 8192 32 3467 46220 1338110 1149431 8192 64 41380 41464 1013597 741761 8192 128 45338 64722 1211992 1000143 8192 256 44279 85998 1215421 933668 8192 512 43491 102600 1223036 495884 16384 4 9639 8825 439450 414597 16384 8 12902 19043 638877 622516 16384 16 19802 28404 464032 417704 16384 32 29401 38390 439861 743678 16384 64 33866 48744 740154 645927 16384 128 41370 57733 780975 672028 16384 256 46252 52835 628753 623437 16384 512 46378 56177 1013295 580789 32768 4 7722 10028 455427 269493 32768 8 14856 17504 303508 434346 32768 16 19523 23488 504852 440738 32768 32 25754 33927 643456 563383 32768 64 38966 50045 901902 983281 32768 128 38638 55370 984528 652656 32768 256 45932 67422 914748 903865 32768 512 49790 82718 1220455 1230442 65536 4 10124 11289 310976 436322 65536 8