How can I implement an atomic incr and decr on top of an eventually consistent key-value store?

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How can I implement incr/decr on top of a key/value store?

How can I implement incr/decr on top of a key/value store? I'm using a key value store that doesn't support incr and decr though which is why I want to create this. I have used Redis and Memcached incr and decr, so as mentioned in some of the answers then this is a perfect example of how I want the incr and decr to behave, so thanks to those who mentioned this.

Answer:

The point of having a incr() function is it's all internal to the store. You don't have to pull data...

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