Help Center > > Management Guide> Managing Snapshots> Manually Creating a Snapshot

Manually Creating a Snapshot

Updated at: Nov 14, 2019 GMT+08:00

Scenario

A snapshot is a complete backup that records point-in-time configuration data and service data of a data warehouse cluster. This section describes how to create a snapshot on the Snapshot Management page to back up cluster data.

Impact on the System

A cluster for which a snapshot is being created temporarily cannot provide complete services. For example, you cannot restart the cluster, resize it, reset the password, or modify the cluster configuration information during snapshot creation. To ensure integrity of the snapshot data, stop writing data to the cluster when you are creating a snapshot.

Prerequisites

The cluster for which a snapshot is to be created must be in the Available, Read-only, or Low performance status.

Procedure

  1. Log in to the DWS management console.
  2. In the navigation tree on the left, click Snapshot Management.
  3. Click Create Snapshot.

    • Cluster Name: Select a data warehouse cluster from the drop-down list. The drop-down list only displays clusters that are in the Available state.
    • Snapshot Name: Enter a snapshot name.

      The snapshot name must be 4 to 64 characters in length and start with a letter. It is case-insensitive and contains only letters, digits, hyphens (-), and underscores (_).

    • Snapshot Description: Enter the snapshot information.

      This parameter is optional. The snapshot description contains 0 to 256 characters and does not support special characters !<>'=&".

    Figure 1 Creating a snapshot

  4. Click OK.

    Task status of the cluster for which you are creating a snapshot is Creating snapshot. The status of the snapshot that is being created is Creating. After the snapshot is created, its status becomes Available.

    If the snapshot size is much greater than that of the data stored in the cluster, it is possible that data is labeled with a deletion tag, but is not cleared and reclaimed. Clear the data and create a snapshot again. For details, see How Can I Clear and Reclaim the Storage Space?.

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