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Redis as primary data source? Good

If it fits your ram of course (and no, swap space is not RAM, just don't)

But you can organize yourself, putting bigger data in the FS for example, and it should be ok.

The only issue with Redis is that it's much 'lower level' than other DBs so don't expect to do a 'SELECT * where condition' out of the box.

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Well, Redis data structures like lists, sets, hashes and sorted sets are great! You don't have to switch context and think in terms of SQL while programming.

Yes, they are great.

But someone may initially think that Redis can find all items that have 'cactus' in the text, which is not true.

One could say Redis is 'almost' a DB (as per the common conception of a db like MySQL, etc) and more like a 'build your own db' kit.

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