• Volume Backup Service

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Related Services

Elastic Volume Service (EVS)

The VBS service provides the data backup function for EVS disks. Data backups can be used to create EVS disks.

Cloud Server Backup Service (CSBS)

CSBS and VBS both provide data backup protection. Table 1 describes the differences between CSBS and VBS.

Table 1 CSBS and VBS




Backup and restoration objects

All EVS disks (including system and data disks) on a single ECS

One or more specified EVS disks (system or data disks)

Recommended scenario

An entire ECS that needs to be protected

Only data disks need to be backed up, because the system disk does not contain personal data.


All EVS disks on an ECS have consistent data. They are backed up at the same time, eliminating the problem of data inconsistency caused by backups generated at different points in time.

Data is secure while the service is cost-competitive.

Key Management Service (KMS)

The encryption feature relies on KMS. If an EVS disk is encrypted, its backup data will be stored in encrypted mode.

Simple Message Notification (SMN)

VBS adopts SMN to notify users of VBS backup information.

Tag Management Service (TMS)

Working with TMS, VBS supports tag presetting and backup filtering and management.