What is the best key-value database?

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What are the uses of a key-value database?

I've heard about highly scalable key-value databases, like Amazon DynamoDB and Kyoto Cabinet. But I can't see an use for everyday problems. Ex.: Suppose I have a "post object", which has an id, a title, a content and some tags, and I want to query the database to find all posts with some particular tag. How can I do it with a key-value database?

Answer:

Key value stores are extremely fast (typically in memory) and provide eventual consistency. Many of...

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Bob Carlin at Quora Mark as irrelevant Undo

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David Cramer at Quora Mark as irrelevant Undo

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Answer:

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David Jin at Quora Mark as irrelevant Undo

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Answer:

you do know if we answer this what ever grade you get, you wouldn't deserve right?

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Angelina at Yahoo! Answers Mark as irrelevant Undo

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Answer:

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Is there a way to fix this problem with my PostgreSQL database/server?

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Answer:

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Hadi Moshayedi at Quora Mark as irrelevant Undo

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