Working with Volume Snapshots 8
CTERA C-Series User Guide 91
Table 21: Retention Policy Fields
Select the desired snapshot retention policy:
Short. Short-term retention policy.
Normal. Medium-term retention policy.
Long. Long-term retention policy.
Custom. Configure a custom retention policy.
The default value is Normal. For an explanation of each policy,
see Understanding Snapshot Retention Policies (on page 91).
If you selected Custom, the other fields in the dialog box are
enabled, and you can use them to configure a custom retention
policy.
Retain all snapshots at least
Type the minimum number of hours that snapshots of any type
should be retained.
The default value is 24 hours.
Type the number of daily snapshots that should be retained.
Type the number of weekly snapshots that should be retained.
Type the number of monthly snapshots that should be retained.
Type the number of yearly snapshots that should be retained.
Understanding Snapshot Retention Policies
You can configure a snapshot retention policy for all NEXT3-snapshot-enabled volumes. A
retention policy specifies the following:
The number daily snapshots to retain
For example, if daily snapshots are set to 10, then the last 10 daily snapshots will be
retained. If daily snapshots are set to 0, then the current daily snapshot will be deleted
when the next day starts.
The number of weekly snapshots to retain
A weekly snapshot is the latest snapshot taken during the week.
A week is defined as starting on Monday and ending on Sunday.
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