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I have a few .Net projects that would benefit from using a document/object database opposed to a relational one. I think that db4o would be a good choice, but we're not sure how much the cost is. I'd love to use MongoDB but it's design isn't for small scale, single server applications.

Are there other options out there that I just haven't run across for small scale applications?

EDIT: So is this a space that doesn't have a good solution, yet? Are there no small scale & durable document databases? Would my best choice be to use MongoDB and set the --syncdelay option set to 1?

Joe Doyle
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    I ran into this http://java-source.net/open-source/database-engines the other day (I was looking for db4o alternatives :-). It provided me with a good 'fan' in my searching. There truly are a number of viable solutions and different approaches. A number of the DBs listed there provide commercial licenses, for cost. Also, despite the name, some of them offer .NET versions and/or have .NET clones. –  Mar 26 '10 at 01:37
  • Thanks pst. That's a good link. I hadn't run into that list before. – Joe Doyle Mar 26 '10 at 01:55
  • Not released yet, so I won't post as an answer - but Raven DB may be interesting: http://ayende.com/Blog/archive/2010/03/23/unveiling-raven-db.aspx – Marc Gravell Apr 05 '10 at 13:08
  • Thanks Marc. I've seen the posts about it and it does sound like it might be what I'm looking for. – Joe Doyle Apr 06 '10 at 09:10

3 Answers3

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BerkeleyDB is pretty good.

Dean Harding
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if, it's really very small scale, just serialize/deserialize it yourself :) or create a document based structure in an embedded relational database like SqLite...

Tim Mahy
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So RavenDB looks to fit what I'm looking for. I played around with the source and gave it a spin. It's a mix of CouchDB and MongoDB. The main difference is that it uses the ESE engine built into Windows which provides crash recovery, which is mainly what I'm looking for. According to Ayende's Blog there's still much more to be done before it's released, but it's fun to follow along from GutHub.

Joe Doyle
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