Remote backup retention refers to the duration of time that the remote backups that are retained at a secondary Storage Group. SnapManager and Protection Manager work together to retain or delete your backups, based on the protection policy that you select for a dataset.
You can specify the number of local backups to retain by using the backup management groups. Protection Manager controls remote backup retention. When SnapManager deletes a backup, it deletes the metadata only, after confirming with Protection Manager that the archive backup has also been deleted.
New backups are continuously created. If the number of backups or the duration of retention exceeds the management group setup, the policy deletes the oldest backup on the secondary storage.