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FusionCloud 6.3.0 Solution Description 05

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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
What Is Volume Backup Service?

What Is Volume Backup Service?


Volume Backup Service (VBS) creates backups and replicas of Elastic Volume Service (EVS) disks to ensure data security and accuracy.


VBS has the following functions:

  • EVS disk backup
  • Policy-driven data backup
  • Backup data management
  • Backup replication and saving
  • EVS disk data restoration using backups or replicas
  • EVS disk creation using backups or replicas

Restrictions and Limitations

  • EVS disks cannot be restored in a batch.
  • EVS disk backup and restoration operations can only be performed within a Region but not across Regions.
  • Concurrent backup on the same EVS disk is not supported.
  • If you use a backup to create an EVS disk, the new EVS disk cannot be used as a system disk.
  • VBS provides backup for ECSs created on the ManageOne operation plane, but does not provide backup for VMs on other platforms such as MANO.
  • VBS is applicable to a single EVS disk but does not support consistency backup of multiple EVS disks.
  • EVS disk snapshots generated during backup will occupy space of the production storage. (The space occupied by the EVS disk snapshots is equal to the service change amount of the original EVS disk during the snapshot retention period.)
  • EVS disk-level restoration is supported and file- and directory-level restoration are not supported.
  • If you want to restore an attached EVS disk, detach it before starting the restoration.
  • Backup for the VMware EVS disks managed by FusionSphere OpenStack is not supported.
  • If an EVS disk of a Windows ECS installed using the cloud-init image is restored to the system disk of a new ECS and the new ECS uses a key pair for authentication, you need to reset the password for logging in to the new ECS on the ECS console.
  • An EVS disk for which backups have been created can be deleted, expanded, or migrated only after you have deleted its latest backup.
  • The advanced SAN storage solution is required for the production storage (one EVS disk of ECSs corresponds to one LUN on the storage device).
  • An EVS disk can be added to a VBS instance only.
  • In the same Region, cross-AZ replication and restoration are supported. For different Regions, cross-Region replication and local restoration are supported but cross-Region restoration is not supported.
Updated: 2019-04-23

Document ID: EDOC1100026685

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