You might also look into Berkeley JE. It's an in-process KV store, which might be a minor crimp for you, but it's more mature than god and transparently handles

You might also look into Berkeley JE. It's an in-process KV store, which might be a minor crimp for you, but it's more mature than god and transparently handles paging to disk and shadowing. We used it as durable working memory for a high volume stream-processing application, bundling rows together into pages, compressing them, and then letting JE handle caching and GC. It does an excellent job. http://www.oracle.com/technetwork/database/berkeleydb/overview/index-093405.html http://www.oracle.com/technetwork/database/berkeleydb/overvi... License for server usage is Sleepycat. http://en.wikipedia.org/wiki/Sleepycat_License http://en.wikipedia.org/wiki/Sleepycat_License