Adding Additional memcached Servers

Adding an additional memcached servers helps to distribute the cache and balance the load across the memcached servers.

To add an additional memcached server

1. Edit networking.properties on all instances.
2. Update the MemCachedServers entry
3. Restart all servers, following the Server Restart Sequence
   Note: The sequence is important!

Example

There is one memcached server running on serverA (192.168.0.1) on port 11211. On each instance, the networking.properties has this:

MemCachedServers=192.168.0.1:11211

A second memcached server is brought up on serverB (192.168.0.2) on port 11211. The networking.properties file is edited on all instances so it looks like this:

MemCachedServers=192.168.0.1:11211 192.168.0.2:11211

After following the Server Restart Sequence, all instances are using the new, distributed cache.

If a 3rd memcached server is added (192.168.0.3), the networking.properties file will look like this:

MemCachedServers=192.168.0.1:11211 192.168.0.2:11211 192.168.0.3:11211

Again, the Server Restart Sequence is followed to enable the new configuration.