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On the Snapshot page, click 
to access the page for creating a snapshot policy. The operation steps are as follows:
Step 1.Select Storage Based Snapshot or Disk Based Snapshot.
A VM can only be associated with snapshots of the same type.
Storage Based Snapshot (Recommended)
Scenario: VMs using virtual storage provided by three or more nodes
Principle: Use storage ROW technology to take snapshots for VMs.
Benefits: Provide good performance when VMs use virtual storage to store data.
Disk Based Snapshot
Scenario: All VMs wherever they are stored (in local storage, external storage, or virtual storage).
Benefits: Compatible with multiple storage types
Step 2.Select specific virtual machines or consistency groups.
If the selected object has been added to a snapshot policy, it will be removed from that policy and added to the current policy.
Step 3.Configure the execution frequency of the snapshot policy; the options are Weekly, Daily, and Hourly.
Merge earlier snapshots as follows to free up storage space
Retain all snapshots in recent 24 hours.
Retain 5-24 recent snapshots, and merge earlier snapshots.
Retention Settings
When Hourly is selected, the most recent 24 hours are retained by default, with a retention quantity of 24.
When Daily is selected, the most recent 7 days are retained by default, with a retention quantity of 7.
When Weekly is selected, the most recent 5 weeks are retained by default, with a retention quantity of 5.
A maximum of 5 retention policies can be set.
Step 4.Configure basic information and fill in the snapshot policy name and description.
Step 5.Confirm the information and click OK to complete the creation of the snapshot policy.
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