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: Sat Aug 15 18:06:44 2026 Auto Mode Machine = Linux oleg313-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-oleg313-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 2613 7559 548044 571375 64 8 3768 15771 780776 735831 64 16 5189 20744 1083249 752329 64 32 6667 49201 131727 1070292 64 64 4066 49528 1304314 1768283 128 4 3226 6901 677178 450846 128 8 6826 10548 637004 727658 128 16 7475 30687 540217 1206978 128 32 8001 17365 1085013 329812 128 64 6083 33710 895074 1220700 128 128 7495 52738 1455701 1802755 256 4 2788 10912 537999 300531 256 8 6642 8954 682691 119679 256 16 7667 21211 1040643 807442 256 32 7158 35995 1122215 951219 256 64 12623 47460 1293967 1032636 256 128 12167 24624 1461259 610842 256 256 4001 37976 519266 2097948 512 4 6439 4202 184510 367291 512 8 10858 19413 743123 665720 512 16 18359 18110 542320 516743 512 32 18343 42271 1391032 1017858 512 64 20563 30897 394192 1108203 512 128 14794 22621 912733 750656 512 256 22762 79036 1759070 540137 512 512 19131 43997 1764853 2235086 1024 4 8868 7237 277958 237372 1024 8 7263 18600 819211 721624 1024 16 14894 20701 471673 454695 1024 32 28461 30493 398908 716567 1024 64 22635 20551 917570 1042770 1024 128 29841 29611 1203137 1133893 1024 256 27184 42931 400321 599202 1024 512 33037 65086 616136 728354 2048 4 5185 7528 321361 295442 2048 8 12439 11369 283142 405629 2048 16 17096 21093 659353 511250 2048 32 25354 21056 1233688 1027036 2048 64 27346 25087 459507 489934 2048 128 27193 68139 816238 427917 2048 256 43982 69579 915497 894709 2048 512 44910 77690 468862 390401 4096 4 8764 4827 203700 101910 4096 8 10172 8945 291427 221596 4096 16 11404 17147 611169 344777 4096 32 30721 23012 478897 298475 4096 64 20943 32281 1315375 1163963 4096 128 24827 54237 752519 885067 4096 256 32515 57699 645039 1337703 4096 512 35636 64381 724314 515682 8192 4 7675 5226 401015 128598 8192 8 8015 11494 523921 318346 8192 16 15372 2505 247747 334708 8192 32 19377 19580 679156 630502 8192 64 24966 39429 660804 694770 8192 128 31395 30702 504868 719729 8192 256 25936 30061 1284197 364819 8192 512 26329 64782 1668450 803608 16384 4 6009 7188 433356 245976 16384 8 5775 8807 542174 468250 16384 16 10699 13485 291265 281454 16384 32 22503 29176 783737 644274 16384 64 22512 28612 404054 695739 16384 128 27198 37011 471864 319358 16384 256 18382 27085 639151 640700 16384 512 25403 32042 547832 387630 32768 4 7455 5993 263108 198178 32768 8 10184 10323 359902 357776 32768 16 13542 21370 496193 654587 32768 32 18107 22132 654104 427619 32768 64 25826 27155 528438 560403 32768 128 31052 41713