[[high-availability]] = Set up a cluster for high availability [partintro] -- Your data is important to you. Keeping it safe and available is important to {es}. Sometimes your cluster may experience hardware failure or a power loss. To help you plan for this, {es} offers a number of features to achieve high availability despite failures. * With proper planning, a cluster can be <> to many of the things that commonly go wrong, from the loss of a single node or network connection right up to a zone-wide outage such as power loss. * You can use <> to replicate data to a remote _follower_ cluster which may be in a different data centre or even on a different continent from the leader cluster. The follower cluster acts as a hot standby, ready for you to fail over in the event of a disaster so severe that the leader cluster fails. The follower cluster can also act as a geo-replica to serve searches from nearby clients. * The last line of defence against data loss is to take <> of your cluster so that you can restore a completely fresh copy of it elsewhere if needed. -- include::high-availability/cluster-design.asciidoc[] include::high-availability/backup-cluster.asciidoc[] include::ccr/index.asciidoc[]