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 22 06:01:02 2026 Auto Mode Machine = Linux oleg411-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-oleg411-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 3405 14886 175815 148159 64 8 3445 16456 520419 467815 64 16 4352 20848 369844 496362 64 32 8753 18454 1484662 743988 64 64 2742 41826 998622 1124074 128 4 5128 5428 270490 79163 128 8 5463 18083 305594 455436 128 16 7736 31159 604036 264363 128 32 4911 47528 794416 889145 128 64 9617 30011 1217930 1000121 128 128 3806 92423 1162547 1015251 256 4 5175 12300 254452 179291 256 8 5233 14215 409542 245887 256 16 9455 25625 644965 207454 256 32 9395 20421 852984 810490 256 64 12909 125132 924200 955451 256 128 10826 64013 931416 395076 256 256 7069 59150 973645 1911233 512 4 6827 9681 176503 253725 512 8 12569 19601 337983 72572 512 16 8680 9906 396594 591787 512 32 22678 38917 742096 558396 512 64 26800 70040 610982 1032540 512 128 18001 112211 2246778 1323315 512 256 29217 95342 1429934 1368865 512 512 27864 109588 581846 1961520 1024 4 5674 9971 221540 95034 1024 8 13324 15675 228932 152499 1024 16 19948 33270 922497 969780 1024 32 15959 20630 365193 375243 1024 64 25511 39009 382087 495908 1024 128 16971 26202 1245710 926676 1024 256 18735 67492 1113030 1010864 1024 512 26832 106498 1617808 1015885 2048 4 4743 9272 96640 81743 2048 8 12763 12827 202751 173205 2048 16 12010 12938 136660 622874 2048 32 16040 26169 379048 271688 2048 64 19512 58454 856526 293113 2048 128 34624 70525 1345582 1313685 2048 256 27734 72861 968774 400934 2048 512 40259 61387 861594 1134613 4096 4 9278 7367 100693 61092 4096 8 6078 14349 218152 258193 4096 16 18392 24821 478843 279589 4096 32 33772 28971 836581 502882 4096 64 21677 34059 416938 435464 4096 128 41427 61047 1429653 807559 4096 256 36480 62358 726366 615483 4096 512 56436 87968 961498 846307 8192 4 7810 8879 104229 88842 8192 8 13242 12556 259395 271700 8192 16 21032 23211 283922 301774 8192 32 22273 43629 403383 752252 8192 64 28154 3109 455519 432498 8192 128 36208 28058 661186 635775 8192 256 35613 42155 767047 624951 8192 512 34129 53295 966823 501742 16384 4 6228 6781 80667 134346 16384 8 15307 14040 163800 134198 16384 16 12636 17970 413258 411225 16384 32 18932 30051 509101 448912 16384 64 25581 36406 414975 485451 16384 128 26402 28927 799139 605357 16384 256 26067 35885 595826 882945 16384 512 42678 41121 839211 697576 32768 4 5597 5667 112238 90076 32768 8 10144 12929 161482 185229 32768 16 17198 26974 326089 183568 32768 32 27507 30353 686152 448331 32768 64 32258 36067 619770 446120 32768 128 28272 37872 553092 454423 32768 256 35107 46844 948202 766843 32768 512 37843 52356 1049586 721283 65536 4