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I love RethinkDB API. It makes joins possible without going through mapreduce. Though I am using MongoDB currently, I plan on switching to RethinkDB as soon as it is more stable and provides better performance. Excited to see the team making progress on all fronts.

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It makes joins possible without going through mapreduce.

This is pure gold https://twitter.com/shit_hn_says material :)

...Compared to MongoDB, which is referred to in the very next sentence.

I'm not sure what you think is pure gold here - the statement is correct. When dealing with big data, joins are the first thing to go as you need to shard your data. Whether RethinkDB will really solve joins across sharded data is up in the air though - ultimately you still need to do filtering per shard and then reduce the result somewhere - and doing filtering across two attributes means you are going to be doing a lot of data transfer, but RethinkDB is about the only database I've seen really making progress in this area.

Clustered databases are actually older than mapreduce, hence the hilarity.

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