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 Aug 26 06:07:22 2026 Auto Mode Machine = Linux oleg434-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-oleg434-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 2086 9200 503814 413101 64 8 3982 8461 743988 121916 64 16 2645 11410 789967 653436 64 32 4290 12286 1119387 942521 64 64 2511 45452 491815 516414 128 4 1535 6688 496272 64911 128 8 5044 15189 688467 727658 128 16 4415 21188 841746 699227 128 32 2473 7155 1142750 948860 128 64 2207 22902 1130717 350711 128 128 2355 67363 1471662 1852520 256 4 3235 3644 240382 522297 256 8 6783 10543 103935 177630 256 16 5389 19774 1173737 790209 256 32 4695 48753 770920 1084800 256 64 5098 41843 1132871 85852 256 128 11657 55126 515032 1243036 256 256 14716 71770 1610276 1168627 512 4 5734 4898 428057 168922 512 8 3662 15091 659788 514021 512 16 13385 22553 718028 476709 512 32 19447 42167 1145443 1038532 512 64 18322 28731 584380 978885 512 128 8383 29384 1326585 1060063 512 256 13538 38154 317778 96149 512 512 17809 54076 222035 927716 1024 4 5416 6012 396294 318197 1024 8 11539 13692 487355 419848 1024 16 13344 13655 499019 495165 1024 32 19530 22210 972414 795687 1024 64 19907 15701 1181297 512293 1024 128 17395 35308 526227 864908 1024 256 22141 51138 1203137 537219 1024 512 23552 78161 1580306 1395010 2048 4 7593 11753 339807 326740 2048 8 20786 12916 582810 361000 2048 16 13075 11452 490186 584834 2048 32 26490 30295 731194 960111 2048 64 23426 15377 456551 1076324 2048 128 19003 26596 530576 277732 2048 256 23624 38347 841753 1336787 2048 512 41579 73205 1050267 777524 4096 4 11481 6583 400306 298216 4096 8 9951 11424 328676 335519 4096 16 13320 21108 153040 493124 4096 32 19669 25721 434264 489192 4096 64 33044 35915 570157 860507 4096 128 41558 52854 595163 647470 4096 256 30114 48491 413357 612979 4096 512 35214 48098 454351 618741 8192 4 7782 7123 124946 157248 8192 8 2477 8910 391738 280067 8192 16 10141 12987 270613 446504 8192 32 13264 16097 483675 455465 8192 64 16613 23399 238665 415691 8192 128 24919 53518 675298 528003 8192 256 27348 29191 618450 585855 8192 512 21418 38812 265870 198084 16384 4 4179 5753 276503 149341 16384 8 7498 10206 339810 590841 16384 16 13463 22929 409037 324127 16384 32 20084 30050 920718 672304 16384 64 22307 28621 419425 413184 16384 128 23067 31032 623725 582478 16384 256 23769 32806 927966 562984 16384 512 20724 46079 1026371 627931 32768 4 4611 8251 303874 271119 32768 8 8246 7738 230407 299856 32768 16 12381 18327 349984 274441 32768 32