Backing up a HBase cluster
You can either schedule a backup job or run a backup job manually. See the NetBackup Administrator's Guide, Volume I.
For overview of the backup process, See Backing up HBase data.
The backup process comprises of the following stages:
Pre-processing: In the pre-processing stage, the first backup host that you have configured with the BigData policy, triggers the discovery. At this stage, a snapshot of the complete backup selection is generated. The snapshot details are visible on the Region server web interface.
Data transfer: During the data transfer process, one child job is created for each backup host.
Post-processing: As part of the post-processing, NetBackup cleans up the snapshots on Region server.
On the Hmaster, set the PasswordAuthentication field to Yes in the
/etc/ssh/sshd_configfile. After you update the file, restart sshd.Ensure that all the cluster servers support supports same Hash Key algorithm ( RSA)
Snapshots are not cleaned up if you cancel a job manually. After cancelling the job you must manually delete snapshots from the HBase shell.
If you take backup of an empty table, you need to clean the snapshot manually from the HBase shell.