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Druva Documentation

Phoenix storage compaction

Overview

Compaction is the process of automatic deletion of expired data to make room for new data. Phoenix retains this data for the period that your retention policy dictates. Phoenix also compacts storage data after the deletion of snapshot and backup set, and reduction or expiration of the retention period as described in the following sections:

Delete snapshot(s)

 As a Phoenix administrator, you can delete warm snapshots that you no longer require for the server. 

  • If you are a cloud administrator, you can delete warm snapshots for a server.
  • If you are a group administrator, you can delete warm snapshots for a server belonging to the administrative groups that you manage.

After you delete a snapshot, Phoenix purges the snapshot data from the warm storage, thus freeing up space.

Note: You cannot delete the most-recent snapshot of a virtual machine.

For more information, see:

Delete backup set

If you are a cloud administrator, you can delete a backup set attached to your configured server. When you delete a backup set, Phoenix deletes all the restore points corresponding to that backup set.

For more information, see:

Reduction of the retention period

If you are a cloud-derived administrator or a group-derived administrator, you can update the retention period of the existing backup policies. While updating a retention period, you can specify the duration for which you want Phoenix to retain daily, weekly, monthly, and yearly snapshots. Any changes that you make to the existing retention policies will be applied to all the new as well as the existing snapshots. For example, the current retention to the snapshots is 90 days and after modifying the retention is set to 45 days. Then, all the snapshots older than 45 days will be purged automatically.

For more information, see Update backup policy schedule.

Retention Expiration

Phoenix runs a retention expiration algorithm every night at 11:45 PM UTC to delete snapshots that have crossed the expiration period. This algorithm does not delete thawed snapshots. For example, if your organization's policy mandates retention of 90 days, Phoenix retains the data for 90 days. After 90 days, Phoenix automatically deletes this non-referenced data from the storage space.