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User 1099869 avatar

By marina.sprava
via blog.jelastic.com
Submitted: Feb 19 2013 / 09:40

The cluster ensures that no server can be a single point of failure. The cloud ensures that one server failure doesn’t overload the other servers. Today we will show you how to implement such a setup. In our example, we will use memcached, two Apache servers, and an NGINX load balancer. The main use of memcached is as a distributed caching engine in a multinode environment. But for our purposes, imagine a Web session with sticky sessions running on several app servers. If one server fails, the sessions are stored for backup on a memcached node. Other servers can fetch the sessions from memcached and serve the session from then on.
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