A-E

• A

  availability zone

  A physical region where resources use independent power supply and networks. AZs are physically isolated but interconnected through the internal network. To enhance application availability, you are advised to create instances in different AZs.

  AZ

  See availability zone

• B

  backup

  A process of creating data copies on backup media. If the source data is damaged or lost, the data copies can be used to restore the source data.

  backup policy

  A policy used to automatically back up data by specifying the backup time, backup period, retention rules, and other items. After a backup target is associated with a backup policy, the system will automatically back up data and delete expired backups according to the policy.

F-O

• F

  full backup

  A backup method used to back up all data space of Elastic Volume Service (EVS) disks used by a specific user.

• I

  incremental backup

  A backup method used to back up only data space modified since the last backup. The last backup can be either full backup or incremental backup. Incremental backup can be implemented only on a target that has been fully backed up.

P-T

• P-T

  region

  Regions are divided from the dimensions of geographical location and network latency. Public services, such as Object Storage Service (OBS), Virtual Private Cloud (VPC), and Image Management Service (IMS), are shared within the same region. Users can select a region closest to them to reduce access latencies.

U-Z

• U-Z

  VBS

  See Volume Backup Service

  Volume Backup Service

  Volume Backup Service (VBS) backs up and restores Elastic Volume Service (EVS) disks. You can configure backup policies to implement periodic incremental backup of EVS disks and to store data across data centers so as to improve data reliability.