Dustin Puryear on memcached at ONLamp...
memcached was written to serve one basic role: cache database request. It wasn’t written to provide a massively redundant service. Or to distribute load across memcached nodes. Or to provide a secure proxy to a database service. It just takes a query and returns whatever is in the cache. And this is done using a simple hash, meaning that at its core memcached uses a set of algorithms that you’ll find on every second year Computer Science exam in college.
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