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 May 15 06:10:27 2026 Auto Mode Machine = Linux oleg130-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-oleg130-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 1752 15617 571375 566551 64 8 3599 17892 752329 720041 64 16 3173 16989 886494 603489 64 32 2226 26710 1648808 821391 64 64 4484 45010 1143223 673098 128 4 5541 5014 57922 836500 128 8 5497 12033 715059 766076 128 16 11460 31745 1048974 859260 128 32 9729 40038 232733 753179 128 64 7826 25911 663782 1243315 128 128 8268 64320 1526043 1471662 256 4 4970 11740 590031 573946 256 8 9808 11213 424604 132433 256 16 9688 30428 1206714 615393 256 32 18300 67868 606700 855703 256 64 20468 26933 1420658 1325925 256 128 22852 92757 1532153 481109 256 256 20552 143590 1707589 1985448 512 4 7074 10502 484015 174808 512 8 9955 23296 831132 368110 512 16 26604 34083 851903 999850 512 32 8621 46536 911184 574530 512 64 11708 77471 1467055 1199171 512 128 29440 95520 1336492 608730 512 256 15615 42482 527273 315074 512 512 27540 125924 329277 650593 1024 4 4536 4983 508954 594310 1024 8 12616 10551 601973 301447 1024 16 23327 21804 1147832 487189 1024 32 27831 24996 482808 903099 1024 64 31385 56303 1408737 357294 1024 128 23981 50036 1135091 553203 1024 256 37928 78491 486913 930894 1024 512 38770 85468 687216 1083546 2048 4 6939 11062 265902 332044 2048 8 7833 8731 375093 491364 2048 16 15974 16244 520576 993193 2048 32 15789 39208 1750616 1205468 2048 64 49988 58713 808555 577055 2048 128 31919 48871 359866 931682 2048 256 24076 31969 678359 1283841 2048 512 50326 58685 884210 1526066 4096 4 4890 6251 457193 358198 4096 8 6905 12189 427787 298019 4096 16 10540 17138 394415 460638 4096 32 22885 22787 364770 409397 4096 64 24358 27066 402359 417830 4096 128 18491 35626 802654 649650 4096 256 25365 40748 467736 447896 4096 512 34090 38176 1759546 999480 8192 4 6624 7737 248596 173225 8192 8 7814 15808 357963 315126 8192 16 17052 20209 467792 910534 8192 32 19159 22752 589524 648458 8192 64 28107 34756 300295 276758 8192 128 36483 31257 460612 237312 8192 256 26325 45073 713334 399765 8192 512 38347 52824 423881 599313 16384 4 6037 6018 263692 194436 16384 8 10151 10658 436242 364794 16384 16 17645 16444 583120 235155 16384 32 24262 31463 305505 384419 16384 64 26521 31287 306381 576796 16384 128 36979 49347 545423 721571 16384 256 32412 54820 1181420 725341 16384 512 34581 62805 1312823 750804 32768 4 6462 6005 381765 298107 32768 8 11360 9177 250209 327918 32768 16