Best practices for restoring a Hadoop cluster

When restoring a Hadoop cluster, consider the following points:

Before you run a restore job, ensure that there is sufficient space on the cluster to complete the restore job.
Update the firewall settings so that the backup hosts can communicate with the NetBackup for 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.conf file 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 the restore works correctly.