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 19:58:47 2026 Auto Mode Machine = Linux oleg653-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-oleg653-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 2128 9033 516414 666414 64 8 6820 30962 789967 668072 64 16 6831 33651 320021 1049372 64 32 6804 59974 1385075 1083249 64 64 5986 93832 1562436 1690338 128 4 8268 12407 389091 618653 128 8 9227 21329 1000121 766076 128 16 3870 43698 1278855 919605 128 32 4945 41314 1436229 1175271 128 64 8289 24902 1487977 1391557 128 128 16194 84151 1637771 1561553 256 4 8758 13485 611189 524593 256 8 13832 22069 119135 814795 256 16 11644 29791 1102624 1003679 256 32 3643 43441 1107172 1066483 256 64 19233 67139 1642294 987979 256 128 19635 42931 775373 1552085 256 256 30490 101231 1570244 1970871 512 4 4882 5875 447131 256513 512 8 8872 11298 958781 585176 512 16 15826 38418 1199171 505432 512 32 28943 58147 1273861 1122687 512 64 30520 76543 1421416 1221684 512 128 12142 44557 1575781 1380303 512 256 48957 110134 1614885 1766304 512 512 29369 61821 1014013 1198502 1024 4 8215 9232 82347 280317 1024 8 11605 15279 370613 451303 1024 16 25290 23398 1128826 992182 1024 32 26954 48418 764119 997946 1024 64 29212 40145 479627 766985 1024 128 45523 44452 844833 1331440 1024 256 20487 45835 1368780 454503 1024 512 25625 72511 1125277 1709912 2048 4 5839 6540 301086 207708 2048 8 6772 13725 475375 467662 2048 16 13782 17285 770480 631111 2048 32 25677 26120 1002933 568877 2048 64 26654 52468 549481 720583 2048 128 26798 49357 1583746 687040 2048 256 40575 53944 1689998 964640 2048 512 35304 48822 791348 1241893 4096 4 6756 6842 431743 275659 4096 8 10619 10401 574619 559790 4096 16 16441 21131 496545 357505 4096 32 32568 31420 309525 490477 4096 64 23366 42279 545413 809500 4096 128 38315 49229 906216 254028 4096 256 31248 57557 622012 1357576 4096 512 49537 86166 762032 346209 8192 4 9213 2360 347370 239827 8192 8 10124 11107 690664 515085 8192 16 17719 23629 679612 380212 8192 32 18277 23327 609379 627783 8192 64 48122 44085 556254 511269 8192 128 22927 60699 630687 570875 8192 256 35403 40655 590791 1000143 8192 512 43971 63563 427398 1150239 16384 4 6483 6293 199384 168402 16384 8 10669 10598 250991 249182 16384 16 15669 17242 736852 436068 16384 32 18790 25170 573590 612485 16384 64 27617 46351 754671 553645 16384 128 43463 40815 1022218 852844 16384 256 37270 55121 916274 587512 16384 512 35388 52630 403496 407075 32768 4 6782 7727 292031 249106 32768 8 12264 12896 577479 303604 32768 16 17213 20506 690142 514194 32768 32 27684 38579 1080063 879790 32768 64 30264 33587 1073097 708448 32768 128 36044 46906 845732 660965 32768 256 38388 48810 1194915 623167 32768 512