Recommendation on "light" in-memory database for small groovy web-application

I need a recommendation on "light" in-memory database for small groovy web-application.

 

Thanks!

Comments

HSQLDB is good enough, "light" and "in-memory"

http://hsqldb.org/

Two other options:
berkeley
H2

:)

Try SQLite:
http://www.sqlite.org/

It actually isn't in-memory, but is very light-weight & fast, so I don't think you'll notice it...

It should work great with Groovy.