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 Aug 7 10:52:53 2026 Auto Mode Machine = Linux oleg460-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-oleg460-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 3024 8033 627470 571375 64 8 7308 26721 852702 831569 64 16 4623 30979 1828508 546928 64 32 7394 42056 1124074 1991276 64 64 5651 58548 1599680 789967 128 4 6144 14404 283787 512376 128 8 9124 22807 579270 484625 128 16 9796 18122 831319 948860 128 32 11663 49514 82105 1172704 128 64 6258 58179 2035099 1377278 128 128 13287 79597 1603529 1911894 256 4 10778 10475 311789 612235 256 8 10268 24093 177044 805021 256 16 15779 26235 1178892 973645 256 32 21244 63117 719277 680960 256 64 22630 69737 1497953 839644 256 128 22109 58742 1652404 1506359 256 256 23460 130011 1718521 1752173 512 4 10657 8157 434994 212352 512 8 17148 27860 1062686 473242 512 16 19827 35881 924521 671129 512 32 21362 57535 1115688 2030130 512 64 25892 102667 967855 1523247 512 128 26313 62684 2073249 1326585 512 256 20771 108591 1570020 1053821 512 512 23736 145367 1619757 1309596 1024 4 8595 13892 335628 444208 1024 8 18008 20514 611748 487134 1024 16 27168 27381 1155864 474330 1024 32 33630 37775 1304348 1189476 1024 64 39728 94326 856115 695112 1024 128 34572 92560 982648 603072 1024 256 38851 82794 952573 764663 1024 512 60263 68220 1142945 781783 2048 4 12592 12363 464200 344495 2048 8 15958 22522 556818 654530 2048 16 26918 36077 929163 988393 2048 32 35464 59907 1356204 878244 2048 64 44780 60607 1527152 1215360 2048 128 42666 71661 531923 844484 2048 256 49719 84366 806884 1383731 2048 512 60900 76538 1018874 1229979 4096 4 12808 12806 398440 382729 4096 8 19624 23183 784655 456016 4096 16 32311 42974 733655 385001 4096 32 48456 45539 1316989 929002 4096 64 53496 97278 895120 924851 4096 128 52641 59010 1102559 1152484 4096 256 52574 75872 1765513 817240 4096 512 77418 98608 1985468 1252651 8192 4 14413 14352 653316 331754 8192 8 21080 24857 603598 579512 8192 16 30376 38221 1068040 660017 8192 32 47347 59334 1017529 747799 8192 64 36755 63862 863965 578575 8192 128 53007 63744 1174298 1051212 8192 256 53345 67590 1289644 1180389 8192 512 59514 78002 1847615 928370 16384 4 11469 13720 490920 505897 16384 8 5445 21357 527650 447588 16384 16 27655 38817 1192346 913120 16384 32 39363 48977 1045961 542063 16384 64 43208 47214 1052143 821219 16384 128 54444 71143 789091 973904 16384 256 57339 59720 1145099 843051 16384 512 65299 92197 1261676 1447097 32768 4 12519 12489 606567 547694 32768 8 19136 20213 733278 624447 32768 16 30892 40085 824415 793047 32768 32 50171 61059 1277897 1063408 32768 64 53945 69396 1069873 895964 32768 128 65005 91836 1295691 1331439 32768 256 65102 95884 1743423 1486954 32768 512 85410 107280 1617446 1454029 65536 4 12520 13494 607528 563042 65536 8 20614 21595 768453 734502 65536 16 28894 31960 754719 538339 65536 32 40383 52324 1386620 862519 65536 64 57288 72895 1136968 1170326 65536 128 72413 91889 1220639 1407891 65536 256