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 Apr 1 07:27:43 2026 Auto Mode Machine = Linux oleg416-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-oleg416-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 2143 7149 703068 565358 64 8 2072 23239 735831 551422 64 16 3094 34446 127232 418250 64 32 1991 30605 1204796 1083249 64 64 3129 25858 1421755 1452528 128 4 3167 10109 443033 349797 128 8 2666 17962 747933 355589 128 16 4151 23712 927549 805138 128 32 5592 25271 1142750 871818 128 64 7339 33559 653282 1346196 128 128 4068 42864 901083 1778862 256 4 5019 9268 359977 608074 256 8 3471 11770 587127 286040 256 16 4492 40667 348866 870268 256 32 12251 41788 809878 1084800 256 64 9455 13856 1248819 1208072 256 128 7696 17529 1437779 388360 256 256 16226 42440 1201314 382140 512 4 4462 5641 591951 498625 512 8 6174 13758 787545 266245 512 16 13311 21656 1004057 863203 512 32 9697 39006 1309596 215226 512 64 10606 12689 1096882 332901 512 128 16345 28054 769761 690996 512 256 10228 53804 646480 969603 512 512 11489 67770 371035 1985091 1024 4 6826 6122 261683 355167 1024 8 8212 14855 495450 220256 1024 16 12870 11244 553560 848337 1024 32 14384 29574 1167489 993100 1024 64 24519 46188 1188159 405231 1024 128 15568 61080 878171 1149368 1024 256 18911 48115 539853 716567 1024 512 22384 103215 326444 263304 2048 4 5353 4418 290663 186811 2048 8 12064 15302 693978 485531 2048 16 16584 21030 276980 531956 2048 32 24239 33282 523910 573013 2048 64 23988 40870 1254040 575123 2048 128 26386 40112 949919 1161617 2048 256 35793 52922 198625 1342008 2048 512 25401 50557 921290 629400 4096 4 7123 6954 383232 388686 4096 8 13948 13948 550393 538742 4096 16 18755 18440 625431 589688 4096 32 30833 29073 774293 825843 4096 64 27204 58516 825328 418808 4096 128 28370 38246 688632 804571 4096 256 36288 48495 548688 588093 4096 512 39702 82379 961713 947290 8192 4 6322 6467 333629 272657 8192 8 9875 13171 623251 624111 8192 16 18341 19255 459657 434675 8192 32 26970 36894 507216 447428 8192 64 29939 36355 478842 458626 8192 128 29606 36651 1009250 1036811 8192 256 35003 40843 1286842 654835 8192 512 34750 40163 548625 848015 16384 4 6737 7819 307138 297026 16384 8 10433 14775 623465 467658 16384 16 18599 19789 689298 366025 16384 32 24524 25643 670624 946499 16384 64 26456 43417 510835 362791 16384 128 35966 50334 599155 401638 16384 256 32759 44310 1107471 611689 16384 512 43868 53539 849785 995994 32768 4 6717 7751 324615 341846 32768 8 11963 13369 468148 441249 32768 16 17152 24292 501752 451193 32768 32 24315 26631 830934 844973 32768 64 29188 46325 1168203 801468 32768 128 36810 49747 853155 741407 32768 256 39755 60219 973675 639563 32768 512 53973 75880 892085 1096609 65536 4