Instagram Engineering: Storing hundreds of millions of simple key-value pairs in Redis
When transitioning systems, sometimes you have to build a little scaffolding. At Instagram, we recently had to do just that: for legacy reasons, we need to keep around a mapping of about 300 million photos back to the user ID that created them, in order to know which shard to query (see more info…
Source: instagram-engineering
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Really nice article...key-value storing
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