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: Wed Sep 16 04:09:36 2026 Auto Mode Machine = Linux oleg127-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-oleg127-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 6960 10415 674790 16859 64 8 1213 17596 821391 780776 64 16 9807 55213 674790 789967 64 32 12444 72968 780776 1526887 64 64 5117 58130 695778 2006158 128 4 7599 12670 571865 531131 128 8 11053 17611 836500 795593 128 16 4781 48064 1076312 504196 128 32 8553 22631 589446 1022989 128 64 7290 131014 408949 1359835 128 128 17027 78861 1504659 1939522 256 4 13973 15073 534517 431082 256 8 7820 20382 556398 532397 256 16 12066 43382 671589 496917 256 32 22863 97596 766517 1112909 256 64 25950 167855 1413179 1262029 256 128 23501 82634 1354356 1274008 256 256 10484 63796 1600674 1924938 512 4 10887 11587 743123 102237 512 8 10789 23672 572691 339318 512 16 17699 39125 912733 652174 512 32 24206 54203 386390 1147892 512 64 20073 56054 1487377 966113 512 128 18639 38861 1388334 1019791 512 256 36922 98631 871966 572081 512 512 24016 143129 1970519 2105777 1024 4 5005 12385 479412 255048 1024 8 14735 13255 621395 108338 1024 16 14647 17355 1040496 1312720 1024 32 17876 67036 536682 727244 1024 64 18442 90323 896689 1558516 1024 128 20068 64317 1633188 628212 1024 256 30781 79762 1067654 957030 1024 512 28093 113461 1393200 329247 2048 4 9129 8194 167966 169604 2048 8 14725 23284 883846 759042 2048 16 20150 24281 1248935 679486 2048 32 23111 48164 698720 567786 2048 64 37654 65138 1399056 485531 2048 128 36845 38673 742315 1086535 2048 256 21384 27771 290251 151298 2048 512 35581 59687 1365474 1115459 4096 4 10359 9719 398329 323101 4096 8 17064 16498 333247 631524 4096 16 22678 17596 394877 315778 4096 32 22775 52234 1337287 961929 4096 64 19923 41640 1473426 638898 4096 128 28976 31871 1215430 559699 4096 256 35115 67799 593456 638519 4096 512 36739 66534 1808444 1005681 8192 4 7450 8796 384781 362288 8192 8 16222 15336 553557 267616 8192 16 19618 23133 713274 706382 8192 32 24932 34241 680690 685456 8192 64 34081 47806 614919 555984 8192 128 39586 46009 1030839 1147972 8192 256 56173 70695 478535 821672 8192 512 46830 65322 1211863 937080 16384 4 9592 10290 553195 478378 16384 8 15573 16883 479386 532536 16384 16 20085 24828 631852 620324 16384 32 32188 47373 1263230 1045897 16384 64 29660 53030 445242 902899 16384 128 40349 41845 610526 844097 16384 256 31859 76563 1033036 682982 16384 512 48386 85762 766250 814348 32768 4 10320 10035 228046 247921 32768 8 14818 16636 699229 667971 32768 16 24290 29784 700019 537797 32768 32 37453 46067 1027536 689823 32768 64 37543 57564 466149 533081 32768 128 52881 64928 805763 1028921 32768 256 51317 81752 777599 949027 32768 512 57465 82754 1080352 940044 65536 4 9436 9906 544707 425536 65536 8