From Greg Porter's Wiki

"There are three kinds of lies: lies, damned lies, and statistics." Uh, same goes for benchmarks.

iometer

iometer -- iometer is a well known disk benchmark. It has a lot of options that may be a bit confusing initially. Here's how I do it.

tarmark

tarmark - A simple script that exercises the heck out of a ZFS Intent Log (ZIL). You can try different log accelerators and quickly test them.