Posts Tagged “Cluster”

AEM Start/Stop Script Modification for a Cluster

When clustering AEM instances there is a required order for shutting down and starting the instances. This however can be very tricky in a shared nothing cluster as the master & slave can automatically swap places at any time for multiple reasons. This means in order to shut down an instance you typically need to identify the master instance first. Conversely in starting up an instance the slave can only be started after the master...

Configuring CQ for a Shared-Everything Cluster

So recently I was tasked to set up a "Shared-All" or "Shared-Everything" cluster in CQ5.5 (SP 2.1).  I found out fairly quickly that the resources online do not describe this process very well, so I figured I would share my experience with the web!For those who are unaware, the "Shared-All" configuration of CQ5 is where both the datastore and file journal are on a NAS or shared mount between all clustered servers.  The reason we...

Fixing an out of sync CQ Cluster

Every so often a node in a CQ cluster will fall out of sync with its master.  This can happen due to a loss of network connectivity, power loss, or any number of other alternatives.  When the master and slave fall out of sync, it will be impossible to start both nodes (note start, if it was due to a network connectivity issue, it is possible that they can both remain running in a non-clustered...