Last updated：2021-09-22 20:42:12
Kingsoft Cloud EBS provides the snapshot feature that allows you to create snapshots based on EBS volumes in the EBS console. As a method for data backup, a snapshot is a fully usable copy of data on an EBS volume. A snapshot is independent of the EBS volume based on which it is created. After an EBS volume is deleted, all snapshots created based on the EBS volume still exist. Snapshots are also an important means of disaster recovery. If data loss occurs on an EBS volume, you can use a snapshot to restore data to the point in time when the snapshot was created. Snapshots are incremental backups. A snapshot records only data that has been updated since the last time a snapshot was created for the EBS volume. This not only shortens the process of creating a snapshot, but also reduces storage costs.
The snapshot technology allows you to quickly back up data on an EBS volume at any time. You can also use snapshots to create EBS volumes. This helps you migrate and deploy a large amount of business data at a time.
Snapshots are classified into common snapshots and local snapshots based on the data storage location. The following table describes the differences between the two types of snapshots.
|Time required for creation
|Time required for rollback
Disaster recovery coverage
|Kingsoft Cloud Standard Storage Service (KS3) cluster in the same region as the EBS volume
|EBS cluster where the EBS volume resides
|Availability zone-level coverage
Quick data restoration
If data loss or data inconsistency occurs due to viruses, misoperations, or hacker attacks, or errors occur when you change an operating system, upgrade software, or migrate business data, you can use a snapshot to quickly restore businesses data to the point in time when the snapshot was created.
During the beta testing stage of EBS 3.0, you can create snapshots for EBS volumes free of charge. Before Kingsoft Cloud begins to charge fees for creating snapshots, you will be notified of when and how fees are charged. During the beta testing stage, you can create only a limited number of snapshots for each EBS volume.