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> We also have a version of MongoDB in which we've replaced all the storage code with Fractal Trees, we call it TokuMX [5].

What's the deal with TokuKV? Is it a working drop-in replacement for BerkeleyDB and similar key-value stores?

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It's not really a drop in replacement for BDB, it's more like a library whose API was inspired by BDB. You're welcome to use it directly, but it doesn't implement all of BDB, we have added a bunch of things (like db->update), and there may be some weird contractual things you need to get right that we haven't documented well. Contact us if you'd like to use it, we can help you.

Thanks! I'm certainly not hung up on the BDB API, so I will check it out.

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