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    <p>Well, few answers for your question:</p> <ol> <li><p>To load balance Node.js, it means exactly what you thought about what it is, except that you don't really need separate server, you can run more then one process of your node server on the same machine.</p></li> <li><p>Each server/process of your node server will have it's own connections, the default store for websockets (for example Socket.IO) is MemoryStore, it means that all the connections will be stored on the machine memory, it is required to work with RedisStore in order to work with redis as a connection store.</p></li> <li><p>Redis PUB/SUB is a good way to achieve this task</p></li> <li><p>You are right about what you said here, redis doesn't scale at this moment and running a lot of processes/connections connected to redis can make redis to be a bottleneck.</p></li> <li><p>Redis doesn't scale, that is correct, but according to this presentation you can see that a cluster development is in top priority at redis and redis do have a cluster, it's just not stable yet: (taken from <a href="http://redis.io/download" rel="noreferrer">http://redis.io/download</a>)</p></li> </ol> <blockquote> <p><strong>Where's Redis Cluster?</strong></p> <p>Redis development is currently focused on Redis 2.6 that will bring you support for Lua scripting and many other improvements. This is our current priority, however the unstable branch already contains most of the fundamental parts of Redis Cluster. After the 2.6 release we'll focus our energies on turning the current Redis Cluster alpha in a beta product that users can start to seriously test. It is hard to make forecasts since we'll release Redis Cluster as stable only when we feel it is rock solid and useful for our customers, but we hope to have a reasonable beta for summer 2012, and to ship the first stable release before the end of 2012.</p> </blockquote> <p>See the presentation here: <a href="http://redis.io/presentation/Redis_Cluster.pdf" rel="noreferrer">http://redis.io/presentation/Redis_Cluster.pdf</a></p>
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