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 Aug 27 07:31:36 2026 Auto Mode Machine = Linux oleg409-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-oleg409-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 4893 11668 627470 177207 64 8 9824 13250 134973 769584 64 16 4577 9946 1101022 300665 64 32 2658 33681 1083249 1279447 64 64 4827 61954 842003 423529 128 4 7628 11553 540217 576161 128 8 5998 7276 762811 620799 128 16 11224 23396 1065630 656477 128 32 4140 16754 1306873 992724 128 64 7117 80553 231429 1123617 128 128 6002 69302 1710838 1663139 256 4 7034 11714 121329 97747 256 8 6491 6136 873809 561343 256 16 15649 20122 145635 917096 256 32 6537 54397 1280084 475147 256 64 22883 47137 977189 1098113 256 128 27950 81222 1368162 1479379 256 256 16539 58906 1514860 913973 512 4 4795 8578 675350 295275 512 8 15493 17847 635386 939486 512 16 16514 22932 999850 647260 512 32 17579 65115 971797 1125040 512 64 17769 74266 1347393 117221 512 128 26542 80163 350964 407971 512 256 36516 72398 1537424 748302 512 512 23793 83850 1797349 2143612 1024 4 7161 5585 260556 253020 1024 8 10735 6502 466549 335733 1024 16 11915 13247 793189 299492 1024 32 23141 35644 404582 409285 1024 64 32011 50070 464430 1199106 1024 128 31876 35442 1304348 223384 1024 256 55540 85157 979734 1019019 1024 512 40912 89409 282790 276830 2048 4 7922 6327 119914 84817 2048 8 11775 11952 456236 527157 2048 16 16249 24672 483700 483237 2048 32 20298 21023 364338 1055688 2048 64 14601 53988 834557 595703 2048 128 28746 21192 521524 1333259 2048 256 18349 50491 525673 597444 2048 512 28449 44548 1665101 490774 4096 4 4227 5405 418003 208765 4096 8 9260 10021 515218 310606 4096 16 9829 22398 508057 371651 4096 32 24232 29279 529135 355001 4096 64 23091 48249 1110039 294146 4096 128 28835 24576 585647 381234 4096 256 25489 64459 899855 720758 4096 512 24054 49499 1783104 862494 8192 4 5768 4995 186215 164429 8192 8 10783 10857 367303 416831 8192 16 14651 23186 467467 485994 8192 32 17681 27426 424347 351542 8192 64 19805 39276 992144 583398 8192 128 24353 38437 588041 475588 8192 256 38367 41440 944446 574550 8192 512 38581 46916 649426 384656 16384 4 5413 5933 257844 269358 16384 8 8980 9833 207956 293352 16384 16 13689 19167 359321 432293 16384 32 27430 39482 571848 434669 16384 64 38212 34660 910423 747781 16384 128 35185 44086 568889 506303 16384 256 40954 46850 1370940 867518 16384 512 42189 59954 372423 616728 32768 4 4799 6246 369607 359590 32768 8 8664 10882 447033 422616 32768 16