Are MongoDB and CouchDB perfect substitutes?

Posted by raoulsson on Stack Overflow See other posts from Stack Overflow or by raoulsson
Published on 2010-01-02T00:00:21Z Indexed on 2010/04/14 14:33 UTC
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databases

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mongodb

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couchdb

I haven't got my hands dirty yet with neither CouchDB nor MongoDB but I would like to do so soon... I also have read a bit about both systems and it looks to me like they cover the same cases... Or am I missing a key distinguishing feature?

I would like to use a document based storage instead of a traditional RDBMS in my next project. I also need the datastore to

handle large binary objects (images and videos)
automatically replicate itself to physically separate nodes
rendering the need of an additional RDBMS superfluous

Are both equally well suited for these requirements?

Thanks!

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