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: Thu Jan 1 20:46:23 2026 Auto Mode Machine = Linux oleg331-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-oleg331-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 1736 8600 200653 270108 64 8 7441 32160 409946 325058 64 16 5576 27186 191629 467815 64 32 5743 42583 780776 532815 64 64 7776 79025 1183548 1421755 128 4 2894 9881 137208 247086 128 8 6091 19402 422464 359398 128 16 9262 30542 335794 21104 128 32 9445 8929 780556 640042 128 64 13436 38255 1076312 883293 128 128 11730 59980 1391557 1539168 256 4 3044 7246 243103 100042 256 8 4425 7581 80274 96275 256 16 14576 30862 416856 474937 256 32 8609 44062 910872 770920 256 64 7518 109400 162225 317599 256 128 8627 26010 1260547 1062263 256 256 16176 46672 1619994 1842366 512 4 6036 3995 250733 73363 512 8 12752 11184 511572 231339 512 16 6242 13968 533960 742096 512 32 13925 29724 997991 242768 512 64 19296 47845 1193175 1155924 512 128 24871 98976 1245780 1292259 512 256 22014 67262 847867 1484293 512 512 17842 32305 1467055 1961520 1024 4 10324 5056 131570 93284 1024 8 7876 11238 280006 405231 1024 16 14310 20862 247223 326742 1024 32 13141 38039 221540 263983 1024 64 29490 55971 666216 925877 1024 128 26542 56509 432228 1041758 1024 256 27199 56106 396112 374295 1024 512 34748 58689 605197 663642 2048 4 4310 4519 87671 61649 2048 8 10316 16503 239255 181525 2048 16 17536 28213 354153 524038 2048 32 22634 28573 430706 935538 2048 64 24340 38296 1151341 273287 2048 128 24114 27737 548919 756568 2048 256 36076 83834 1558461 740460 2048 512 27163 73465 754906 773951 4096 4 7032 8722 85618 121927 4096 8 14107 9636 129562 183685 4096 16 10146 18001 164975 185138 4096 32 20414 19257 270060 519597 4096 64 27837 44063 555932 584472 4096 128 29739 45073 448480 616764 4096 256 24293 48205 918571 743369 4096 512 36415 45661 761053 350926 8192 4 6696 10061 184392 164201 8192 8 12438 14227 191322 103797 8192 16 11894 21651 350249 365370 8192 32 17272 26783 573180 480496 8192 64 24850 25211 508883 404962 8192 128 21231 58911 1316373 679102 8192 256 44425 64874 1000988 646664 8192 512 22376 43178 726240 555651 16384 4 5826 7409 91171 160024 16384 8 10191 15022 162838 195396 16384 16 15656 16900 385651 339593 16384 32 18620 24233 299694 355123 16384 64 23034 23877 727499 447637 16384 128 22587 36584 479680 639752 16384 256 29176 41141 628247 487867 16384 512 26026 40044 1124819 745130 32768 4 5324 6453 170750 108078 32768 8