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: Fri Aug 14 21:00:25 2026 Auto Mode Machine = Linux oleg135-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-oleg135-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 3234 12181 571375 129816 64 8 2471 27538 557144 542506 64 16 3887 18058 1210227 21262 64 32 5949 8338 955947 969761 64 64 2886 62692 1255511 1828508 128 4 5755 7395 653282 455822 128 8 4526 23726 546819 711270 128 16 16548 33437 209485 244275 128 32 6972 74681 695603 983630 128 64 3258 75692 1455701 990891 128 128 8048 58261 321516 1967960 256 4 8472 9440 648079 548441 256 8 6336 19556 861885 690151 256 16 5793 39228 1173737 844929 256 32 16891 54353 1398455 559005 256 64 23743 83795 850282 761623 256 128 12121 39126 1058076 1241598 256 256 27021 67298 675391 2285501 512 4 9562 12486 466762 496091 512 8 8052 9611 884536 751971 512 16 17725 39530 1125040 999850 512 32 12232 43618 1329871 377293 512 64 6439 21062 516246 463338 512 128 29217 82982 568899 1438555 512 256 31117 84209 1571169 488530 512 512 22535 88019 890404 760762 1024 4 4422 7803 352861 328316 1024 8 7624 11677 217733 610965 1024 16 14566 15861 846164 391561 1024 32 16031 46022 942952 577528 1024 64 27097 68022 1473500 438897 1024 128 18519 36485 920717 314769 1024 256 27321 52702 1321607 706664 1024 512 24919 79992 1044037 663232 2048 4 5922 8173 488569 582336 2048 8 5726 9316 131172 317712 2048 16 12790 10495 702779 161350 2048 32 13052 14915 1167617 528097 2048 64 24418 23782 572250 465457 2048 128 23576 26508 708868 538526 2048 256 27756 41487 621207 797224 2048 512 28927 69522 324248 212030 4096 4 3689 7390 282908 355155 4096 8 13979 15417 475057 561620 4096 16 14217 17398 775901 291283 4096 32 19152 31256 580345 282211 4096 64 17821 40366 671697 468271 4096 128 17131 28992 421614 279607 4096 256 22999 38682 1218706 467469 4096 512 37596 43108 820675 453943 8192 4 4694 5432 129817 160598 8192 8 6154 7903 528482 526781 8192 16 9857 11852 499757 410565 8192 32 14393 25457 333765 343278 8192 64 26388 34862 825562 773418 8192 128 26172 29834 504061 473909 8192 256 31124 44872 862577 354784 8192 512 30121 44452 991428 792798 16384 4 4843 5239 187136 321613 16384 8 10421 9027 280312 239812 16384 16 13733 17195 609453 539726 16384 32 23024 25025 600916 557788 16384 64 22312 34343 513960 680371 16384 128 36348 49121 936337 653582 16384 256 32887 53499 1275208 816875 16384 512 27996 57238 1082523 755193 32768 4 4735 5848 232833 247619 32768 8