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 Sep 16 14:39:14 2026 Auto Mode Machine = Linux oleg427-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-oleg427-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 4749 17409 423529 615952 64 8 4081 18593 789967 278227 64 16 3691 29143 780776 598110 64 32 6344 54429 1143223 998622 64 64 6283 41318 1421755 1002351 128 4 6166 6614 17906 389091 128 8 4840 11663 785122 739689 128 16 6467 41696 921183 809997 128 32 7028 35933 1085013 743788 128 64 5798 54677 1278855 1455701 128 128 4424 41292 1196221 38266 256 4 3255 8721 684432 382685 256 8 5882 11987 546765 67779 256 16 20028 37724 524593 672010 256 32 17988 40430 735537 744204 256 64 8780 100709 1495866 1008392 256 128 6322 73308 1137672 1479379 256 256 11938 56003 1755037 1817419 512 4 4254 8085 672600 391461 512 8 10090 16873 813808 139884 512 16 16918 29475 1132755 170154 512 32 24753 20332 394482 684390 512 64 19849 33242 1273861 1079785 512 128 17087 19793 632952 1115109 512 256 10869 49330 1541840 437297 512 512 15989 31233 177100 1823291 1024 4 3571 13515 521372 147980 1024 8 8464 20853 915223 823136 1024 16 25300 24782 607766 432968 1024 32 8677 15527 1131503 266176 1024 64 22552 53897 654341 646072 1024 128 20731 82367 1376236 1324868 1024 256 19556 70747 1081363 964120 1024 512 47513 62930 1587315 241455 2048 4 8607 13403 143719 111698 2048 8 9270 6737 95638 269964 2048 16 7700 17044 459285 206663 2048 32 16309 35796 1110555 520450 2048 64 19875 37478 1322992 692133 2048 128 26759 47398 1233688 1251847 2048 256 46580 30138 666619 694989 2048 512 21084 81366 747418 450801 4096 4 6723 5998 313365 119671 4096 8 1163 7912 367855 696364 4096 16 12819 14310 732466 322192 4096 32 22080 40871 658010 569987 4096 64 23996 30198 631222 768784 4096 128 23130 37869 984869 407600 4096 256 44505 40761 602806 464976 4096 512 25199 55296 665040 600404 8192 4 6154 13040 206025 129107 8192 8 9377 13960 474786 258774 8192 16 16706 15721 558460 589221 8192 32 14155 41059 579062 410462 8192 64 25204 42312 926692 777971 8192 128 22244 36986 713778 593454 8192 256 40593 41610 820104 770936 8192 512 32899 37546 683969 454230 16384 4 5967 5606 579408 139037 16384 8 9013 10599 529851 315721 16384 16 11000 16135 533491 310631 16384 32 18931 28434 654884 372473 16384 64 22322 47338 437116 341653 16384 128 40676 69065 400781 1086030 16384 256 44769 63407 606565 390747 16384 512 28121 81145 480640 332885 32768 4 5837 8051 207897 157857 32768 8 12329 10080