Note: Our Hosted Elasticsearch product's clusters have backups created for you automatically. If you are interested in a hosted solution with free 24/7 support, sign up and spin up a cluster in 5 minutes here: https://qbox.io/signup.
As your cluster and your indexes grow you will see an increasing need to retain the data that you have accumulated. Remember that your backups are worth nothing if you do not test that they can actually restore. If your backups become corrupt and you need to restore at a critical time, you will probably have a huge problem.
The snapshot and restore module allows you to create snapshots of your indices, or a snapshot of the cluster as a whole. The snapshot of your respective indices or whole cluster can then be stored in a remote repository.
There are different types of repositories that are supported. If you have a shared file system, for example an NFS filesystem that is accessible by all nodes at the same mounting point, then you can use that to store your indices or entire cluster snapshot to.