I've read most of the messages on this list with interest. I've done some benchmarking on LevelDB with billions of entries, and on commodity flash SSDs, and thought that summarising it might be of interest to folks on this list:

http://www.acunu.com/blogs/andy-twigg/benchmarking-leveldb/

Comments most welcome.

-Andy

-- CTO, Acunu Inc. www.acunu.com | http://www.cs.ox.ac.uk/people/andy.twigg/