Scalability

Ensuring the scalability of a typical CUE site is fundamentally a matter of correctly caching the content. It involves:

• Correctly tuning the Content Store caches (see Caching).

• Running a distributed memory cache (memcached) to ease the load on the databases (see Distributed Memory Cache)

• Running a well-configured cache server, such as Akamai, Squid or Varnish in front of the application servers.

You will need:

• 6-8 engine hosts

• 2 database hosts

• Some kind of high availability solution for the file system (using HA proxy and virtual IPs, for example)

• 2-4 cache servers (multiplied by two if you are using Squid 2.x).