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: Tue Aug 11 03:13:51 2026 Auto Mode Machine = Linux oleg244-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-oleg244-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 3288 7489 454354 1013707 64 8 7120 15006 385237 842003 64 16 5981 24874 1163036 149562 64 32 5497 36572 1392258 1143223 64 64 5251 57817 718114 1638743 128 4 6323 11941 258508 463696 128 8 5340 21809 870405 740710 128 16 12659 32241 1266785 955616 128 32 6908 30800 1254941 1152564 128 64 8040 10191 1291158 864797 128 128 8439 90583 1543594 1911894 256 4 6246 7045 595264 572721 256 8 7356 21216 842278 281910 256 16 6356 25394 507006 876662 256 32 11684 40596 531080 1407621 256 64 8360 55052 513063 1152323 256 128 18982 81866 1881098 757326 256 256 15793 78119 1740810 725106 512 4 7196 10623 663252 198074 512 8 10829 18028 857345 388768 512 16 18967 29160 1323315 965679 512 32 20262 51900 1209982 1130370 512 64 17348 56400 1091308 340448 512 128 15899 52448 1657257 1155924 512 256 26641 90765 1455126 782951 512 512 30534 92905 1700565 1992458 1024 4 7649 8068 149881 283968 1024 8 14891 11007 931702 612795 1024 16 20983 17643 333232 287311 1024 32 19675 29164 565141 1024854 1024 64 13148 56812 895007 895007 1024 128 17585 55809 1095150 685899 1024 256 34993 59778 912501 1197769 1024 512 26411 93142 1592612 179272 2048 4 3410 5662 170608 221957 2048 8 8918 12635 802512 419311 2048 16 24376 27563 345604 279740 2048 32 23118 23160 336124 241624 2048 64 24662 57489 656632 720885 2048 128 18358 35158 555163 910548 2048 256 21160 45740 1106978 1420104 2048 512 44043 77569 205148 1075650 4096 4 5133 8124 514693 452104 4096 8 11183 16656 580659 579504 4096 16 17186 17470 522855 238318 4096 32 12880 16649 508568 539368 4096 64 33121 39083 361165 431613 4096 128 31221 55776 678488 298262 4096 256 21167 29079 418135 953176 4096 512 55337 71707 847476 813987 8192 4 4484 5019 213417 314788 8192 8 11614 11161 539451 459141 8192 16 16814 17505 568297 537881 8192 32 3636 22407 393448 455972 8192 64 22345 21991 697549 900133 8192 128 28427 40520 830912 1041021 8192 256 31551 49083 473093 979082 8192 512 39316 34187 562824 925220 16384 4 6033 6763 497240 366154 16384 8 11018 12556 511298 461545 16384 16 13988 23323 1213014 759752 16384 32 23098 39055 544175 644026 16384 64 31647 44577 1073728 827180 16384 128 44045 44591 1565442 1367720 16384 256 45259 53309 913971 647900 16384 512 38110 67238 776054 1012922 32768 4 7431 6550 299971 207301 32768 8 10772 11062 422731 271687 32768 16 13569 16016 728115 602208 32768 32 19524 23027 873811 793029 32768 64 24056 32021 1178491 1099082 32768 128 29312 30274 857108 824370 32768 256 35725 46104 716242 613920 32768 512 36536 46246 1106577 867523 65536 4