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 13:55:41 2026 Auto Mode Machine = Linux oleg315-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-oleg315-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 2218 11063 639427 551422 64 8 2322 20617 829001 598110 64 16 3652 37492 942521 863676 64 32 4068 39143 1255511 1232453 64 64 3781 65299 1310683 1336792 128 4 5507 10151 382985 656477 128 8 4398 7583 621518 707520 128 16 5608 26857 695603 983630 128 32 7660 42878 799146 978253 128 64 6371 26048 1346196 1663139 128 128 6534 93502 836500 836500 256 4 3698 11406 188779 145123 256 8 5144 14222 442815 725596 256 16 13476 38225 556687 427307 256 32 10304 43411 1102624 1185399 256 64 13992 25785 1487577 1219045 256 128 8338 53973 1361224 1489641 256 256 7898 45357 575484 1471270 512 4 8050 10870 647260 272945 512 8 4792 16155 906185 299726 512 16 13829 25522 273920 948197 512 32 11607 42496 1017858 530530 512 64 7819 24707 1500891 660803 512 128 18377 36461 1594501 575300 512 256 16909 61420 1028091 180403 512 512 14209 89352 1570020 2141475 1024 4 5903 6219 427028 456532 1024 8 8764 12437 287158 411757 1024 16 13846 11386 243868 577218 1024 32 20439 18958 593325 1095150 1024 64 26650 64088 134668 217084 1024 128 15118 41783 461685 677674 1024 256 18092 38065 500706 752868 1024 512 20810 50632 1689730 1670669 2048 4 5360 5809 264975 402512 2048 8 9776 8961 922576 243811 2048 16 19505 25786 595167 521145 2048 32 16979 32237 455921 1134613 2048 64 19705 32825 686765 344952 2048 128 31444 37698 535004 414816 2048 256 35129 50763 924562 1491617 2048 512 22785 46191 870060 539202 4096 4 6726 6986 327598 579680 4096 8 14859 14647 535702 476110 4096 16 14482 18141 477221 343132 4096 32 19250 23569 486229 336703 4096 64 31899 31953 451890 624681 4096 128 40509 38054 1045207 787857 4096 256 40845 71760 1053216 1108821 4096 512 49032 86531 688632 377896 8192 4 6397 5781 222227 276635 8192 8 9200 10674 443529 264933 8192 16 13553 2775 671156 743511 8192 32 16675 22397 487304 494507 8192 64 25461 34887 495855 764810 8192 128 33721 39565 486001 635928 8192 256 30848 54102 453319 390266 8192 512 35887 55619 1131937 905900 16384 4 6471 6981 462434 311281 16384 8 9677 11046 542590 286623 16384 16 17907 16949 441818 698980 16384 32 20913 24416 533019 931324 16384 64 23035 34787 1009366 808770 16384 128 34984 45088 419113 428744 16384 256 27332 39412 752868 501884 16384 512 32449 59857 670324 752629 32768 4 6459 6458 261710 178295 32768 8 9472 11339 302075 318484 32768 16 14512 20102 521584 429023 32768 32 22496 31649 401475 488011 32768 64 24350 37182 628304 344559 32768 128 28877 37369 959053 530226 32768 256 27288 39898 696942 593064 32768 512