Mostly for the sweet spot between fast and pure-memory (e.g. Memcached) versus slower and high-integrity (e.g. MySQL). It works great for something like a page

Mostly for the sweet spot between fast and pure-memory (e.g. Memcached) versus slower and high-integrity (e.g. MySQL). It works great for something like a page counter, where you want to write a lot, but don't care too much if you lost a few writes. I know other people use it as their primary database or, on the other end of the spectrum, as an in-memory replacement...it can be configured optimally for those settings too.