This topic describes how to copy a created snapshot from one region to another to back up data across regions.
Background information
- When you copy a snapshot to a new region, a snapshot copy is created. You are charged
for copying snapshots and storing the copies. For more information, see Snapshots.
Note The first time a disk snapshot is copied, all data stored in the disk is copied. All subsequent copies of the snapshot in the same region are incremental copies. Snapshots are billed based on snapshot sizes. Incremental copies can significantly reduce the sizes of snapshots to be copied.
- The ID of a new snapshot is different from that of its source snapshot. The new snapshot cannot be used to roll back disks created by the source snapshot.
- Tags added to source snapshots cannot be copied together with the source snapshots.
- Encrypted snapshots cannot be copied.
- DevOps: You can copy snapshots to start business in new regions or migrate business systems to new regions. This helps you reduce O&M costs and improve data availability.
- Cross-region backup: Snapshot copying meets the requirements for compliance audit
and improvement of business reliability. You can restore your business systems in
another region by using new snapshots in the event of a disaster. This reduces recovery
time objectives (RTOs) and recovery point objectives (RPOs).
Note
Snapshot copying is fast compared with image copying and can be used to speed up image copying and eliminate capacity constraints. To copy an image, we recommend that you copy a snapshot and use the snapshot to create an image.
Copy a snapshot
If ECS instances are affected by viruses or data loss is caused by accidental deletion, you can use snapshots in the source region or snapshots copied to the destination region to create instances or disks to restore data. For more information, see Create a disk from a snapshot.
Cancel snapshot copying
When a snapshot is being copied, you can cancel snapshot copying in the destination region.
- Log on to the ECS console.
- In the left-side navigation pane, choose .
- In the top navigation bar, select a region.
- Select the snapshot that is being copied and click Delete in the lower part of the page.
- In the Delete message, click OK.