Your database cluster contains your most business-critical data.
The slave nodes must be online, healthy and in sync with the
master in order to be viable failover candidates.
This means keeping a close watch on the health of the databases
nodes from many perspectives, from ensuring sufficient disk space
to testing that replication traffic is flowing.
A robust monitoring setup is essential for cluster health and
viability – if your replicator goes offline and you do not know
about it, then that slave becomes effectively useless because it
has stale data.
Big Brother is Watching You! The Power of Nagios
Even while you sleep, your servers are busy, and you simply
cannot keep watch all the time. Now, more than ever, with global
deployments, it is literally impossible to watch everything all
Enter Nagios, you best big brother ever. As a long-time player in
the monitoring market, Nagios has both …[Read more]