memcached - Is there an in-memory key/value store that can notify an external entity of a change? -

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i have read in-memory key/value stores have never utilized one. first come uneducated mind couchdb , memcached (i know couchdb isn't in-memory, used such).

i looking 1 of these in-memory stores support basic scripting, such notify external entity (through restful api) of change. preliminary research reveals couchdb supports called change notifications

memcached not seem support type of feature, , more general storage-only service (again, ignorance may shine through here).

does have experience doing this? words of wisdom potential pitfalls or headaches? there other software didn't list support these features?

membase implements memcached tap protocol stream out mutations occur. build lot of stuff on top of (replication use case).


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