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 Sep 18 01:26:19 2026 Auto Mode Machine = Linux oleg424-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-oleg424-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 4850 3633 627470 423529 64 8 4796 22873 710511 598110 64 16 1560 28421 889431 710511 64 32 3247 29508 1163036 566551 64 64 2461 16116 1392258 1484662 128 4 2360 6033 613002 535903 128 8 3959 2967 326403 482881 128 16 5935 27158 1040839 847059 128 32 2365 64653 1332828 334331 128 64 6355 28014 188786 1172704 128 128 6386 44304 1102844 1732927 256 4 2766 10606 677095 528727 256 8 8908 13373 931416 755195 256 16 13638 24121 958864 445202 256 32 6048 24221 1128110 226155 256 64 13538 52720 719277 1052888 256 128 13375 34088 814795 814795 256 256 5953 116904 1354356 2097948 512 4 6086 5964 154452 197837 512 8 8016 10009 237138 211225 512 16 13197 14643 1196499 763195 512 32 24660 11084 1007827 996139 512 64 22680 32700 749870 566348 512 128 24859 106028 1547395 693675 512 256 43108 117807 507942 1282994 512 512 28718 98954 977103 1753325 1024 4 10787 9018 425252 359176 1024 8 10773 24609 131958 159653 1024 16 16696 15318 306875 1018777 1024 32 26005 35521 825668 929082 1024 64 41561 32564 1164956 585799 1024 128 29801 42843 1107005 255549 1024 256 48418 54145 1648862 1244266 1024 512 48070 101175 625923 794510 2048 4 7590 8310 226499 406993 2048 8 15688 20110 340090 525288 2048 16 25465 56569 866287 306446 2048 32 51476 54254 791348 430253 2048 64 52597 84596 397134 153477 2048 128 27653 47306 705260 736145 2048 256 25267 52415 720583 541650 2048 512 19870 99863 428002 1350872 4096 4 9822 9948 409114 156503 4096 8 15998 14895 792692 673118 4096 16 19012 31072 547970 759337 4096 32 1919 33188 1194472 310842 4096 64 26519 42367 586487 404138 4096 128 38013 40330 294338 740932 4096 256 40715 56590 732092 290845 4096 512 47569 68239 997796 1040396 8192 4 9742 10635 414348 315537 8192 8 16560 16369 623873 472215 8192 16 21647 33558 573027 522011 8192 32 31074 49434 843063 655785 8192 64 40773 63931 1017619 1075933 8192 128 45464 70316 1317484 712904 8192 256 49040 73823 1101951 948043 8192 512 65086 107570 1267896 1152477 16384 4 13828 15244 498600 384221 16384 8 22546 30543 656460 320412 16384 16 35991 42086 852357 833581 16384 32 42363 51835 786589 961948 16384 64 41456 60539 1056900 1056218 16384 128 68842 80732 933234 984903 16384 256 48791 91518 947543 936018 16384 512 58587 109052 723486 791646 32768 4 11519 13069 302799 391222 32768 8 18039 22899 590232 531146 32768 16 29988 36991 1105127 546507 32768 32 39598 52898 697193 830894 32768 64 61625 67282 969068 898388 32768 128 65735 99642 1202979 830598 32768 256 67660 123361 500542 742416 32768 512 92546 141491 1891149 1654519 65536 4 15379 15918 657958 548942 65536 8 24900 28517 973816 881321 65536 16