http://www.sleepycat.com/products/je.shtml
Need I say more? ;-)
Now, the only problem is that this requires java 1.4.2 because of memory mapped files.
If you ask me, this feature, alone, is enough for throwing 1.3 down the drain. I mean, if you are running a serious web site and you need tons of cache, and you are still using 1.3, well this is simply not our problem and you should be investing to migrate because that's going to save you tons of headackes anyway.
BerkeleyDB is an ACID database without the client/server overhead and without fancy querying abilities. Everybody and their dog knows that BerkeleyDB is the de-facto standard for storing tons of information in a reliable and efficient way.
I think we should use BerkeleyDB for the cocoon object store and at this point, even the transient/non-transient nature of things could not be needed anymore because we can use memory-mapped files or hybrid-memory cached file backends.
This means that you can forget about your cache. You can showdown your cocoon and restart it and the entire thing would be there as it was before.
Who's with me?
-- Stefano.
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