Deleting a snapshot
An automatic snapshot is automatically deleted when its retention limit expires. If you delete a cluster, all of its automatic snapshots are also deleted.
MemoryDB provides a deletion API operation that lets you delete a snapshot at any time, regardless of whether the snapshot was created automatically or manually. Because manual snapshots don't have a retention limit, manual deletion is the only way to remove them.
You can delete a snapshot using the MemoryDB console, the Amazon CLI, or the MemoryDB API.
The following procedure deletes a snapshot using the MemoryDB console.
To delete a snapshot
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Sign in to the Amazon Web Services Management Console and open the MemoryDB console at https://console.amazonaws.cn/memorydb/ . 
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                    In the left navigation pane, choose Snapshots. The Snapshots screen appears with a list of your snapshots. 
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                    Choose the radio button to the left of the name of the snapshot you want to delete. 
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                    Choose Actions and then choose Delete. 
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                    If you want to delete this snapshot, enter deletein the text box and then choose Delete. To cancel the delete, choose Cancel. The status changes to deleting.
Use the delete-snapshot Amazon CLI operation with the following parameter to delete a snapshot.
- --snapshot-name– Name of the snapshot to be deleted.
The following code deletes the snapshot myBackup.
aws memorydb delete-snapshot --snapshot-namemyBackup
For more information, see delete-snapshot in the Amazon CLI Command Reference.
Use the DeleteSnapshot API operation with the following parameter to delete a
                snapshot.
- SnapshotName– Name of the snapshot to be deleted.
The following code deletes the snapshot myBackup.
https://memory-db.us-east-1.amazonaws.com/ ?Action=DeleteSnapshot &SignatureVersion=4 &SignatureMethod=HmacSHA256 &SnapshotName=myBackup &Timestamp=20210802T192317Z &Version=2021-01-01 &X-Amz-Credential=<credential>
For more information, see DeleteSnapshot.