Best practices for restoring a Hadoop cluster
When restoring a Hadoop cluster, consider the following:
Before you execute a restore job, ensure that there is sufficient space on the cluster to complete the restore job.
Update firewall settings so that the backup hosts can communicate with the Hadoop cluster.
Ensure that you have the valid certificates all the cluster nodes for a Hadoop cluster that is enabled with SSL (HTTPS).
Ensure that you have the valid PEM certificate file on the backup host.
Ensure that correct parameters are added in the
hadoop.conffile for HTTP or HTTPS based clusters.Ensure that the backup host contains a valid CRL that is not expired.
Application-level or file system-level encryption is not supported for Hadoop. You must be a Hadoop superuser to ensure that restore works correctly.