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: Mon Aug 24 19:32:25 2026 Auto Mode Machine = Linux oleg151-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-oleg151-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 4342 10495 1083249 889431 64 8 9663 41833 866463 771797 64 16 2707 50793 1087638 679917 64 32 2703 74673 1232453 1066042 64 64 5240 68833 1226821 1421755 128 4 10305 16262 291491 305421 128 8 5588 18348 1015251 47905 128 16 4740 31510 1102844 821147 128 32 12242 44803 1057236 1074159 128 64 13243 104657 640042 921183 128 128 8269 71025 1603529 3199360 256 4 6935 12320 280731 284148 256 8 7208 6594 1375171 823544 256 16 7793 34060 1108314 432471 256 32 13884 84969 658008 1036624 256 64 24305 78554 1298662 1415041 256 128 13588 44190 1561112 1523457 256 256 14822 94189 554101 1802167 512 4 5360 8832 177466 393830 512 8 6235 14193 541227 519870 512 16 14692 39405 1130370 915847 512 32 21524 56102 1248678 92318 512 64 9160 60598 622855 1199171 512 128 18809 50904 1350783 1199171 512 256 34562 74472 631277 2275345 512 512 17242 29223 186109 2207515 1024 4 6665 8140 151051 567981 1024 8 7728 21054 825192 391454 1024 16 6252 19500 1230718 190162 1024 32 28432 32940 888894 485317 1024 64 25529 39547 1022902 505420 1024 128 24982 70498 456532 1326505 1024 256 14572 104128 1700434 1299219 1024 512 33822 42870 1630707 779938 2048 4 6116 5659 178100 252802 2048 8 7059 13545 344026 818884 2048 16 8991 10837 405304 987030 2048 32 13869 16933 1317918 336572 2048 64 17883 43102 1510236 1248753 2048 128 42345 36543 967356 1300361 2048 256 33766 56759 1593737 310871 2048 512 32901 43920 182792 1503627 4096 4 4711 5659 377307 301153 4096 8 11185 9114 274457 573258 4096 16 11046 14505 598376 540522 4096 32 1193 30507 1656241 1292515 4096 64 31746 43349 2215383 439014 4096 128 49612 48050 1669114 699113 4096 256 14756 24356 1784030 314012 4096 512 35406 66597 1051347 796108 8192 4 6034 5098 211888 173134 8192 8 11335 14191 425092 297696 8192 16 12002 15238 416195 467474 8192 32 12050 15807 356407 204167 8192 64 16873 24340 548993 599836 8192 128 17096 35691 1212376 572425 8192 256 18535 32538 1425963 1010734 8192 512 34945 61708 1135866 1010853 16384 4 7800 4304 214464 192761 16384 8 7885 10288 533247 419961 16384 16 10053 14672 660168 640425 16384 32 22814 34386 912551 799223 16384 64 29936 25679 373406 342517 16384 128 29924 38906 805226 558282 16384 256 28176 51150 897990 892567 16384 512 29152 51191 695648 397342 32768 4 6114 8777 364348 397997 32768 8 10641 12503 491295 530974 32768 16