- Service Overview
- Getting Started
- User Guide
-
API Reference
- Before You Start
- API Overview
- Calling APIs
- Getting Started
-
API Description
-
VBS Backups
- Creating a VBS Backup
- Deleting a VBS Backup (Deprecated)
- Restoring a Disk Using a VBS Backup
- Creating a VBS Backup (Native OpenStack API) (Deprecated)
- Querying Summary Information About VBS Backups (Native OpenStack API) (Deprecated)
- Querying Details About VBS Backups (Native OpenStack API) (Deprecated)
- Querying Details About a VBS Backup (Native OpenStack API) (Deprecated)
- Querying the Job Status
- Deleting a VBS Backup (Native OpenStack API) (Deprecated)
- Restoring a Disk Using a VBS Backup (Native OpenStack API) (Deprecated)
- Sharing a Backup
- Canceling Sharing of a Backup
- Querying Backup Sharings
- Counting Backup Sharings
- Querying Details About a Backup Sharing
-
Backup Policies
- Creating a Backup Policy
- Querying Backup Policies
- Modifying a Backup Policy
- Deleting a Backup Policy
- Associating Resources with a Backup Policy
- Disassociating Resources from a Backup Policy
- Executing a Backup Policy At Once
- Enabling or Disabling a Backup Policy
- Querying Backup Jobs Triggered by a Backup Policy
- Adding a Tag to a Backup Policy
- Removing a Tag from a Backup Policy
- Querying All Backup Policy Tags
- Querying Tags of a Backup Policy
- Batch Updating or Removing Tags of a Backup Policy
- Querying Backup Policies by Tag
-
VBS Backups
- Permissions Policies and Supported Actions
- Appendix
-
FAQs
- What Is Volume Backup Service?
- What Is a Backup Policy?
- What Are the Differences Between Backup and Disaster Recovery?
- How Do I Purchase and Renew VBS?
- What Are the Differences Between CSBS and VBS?
- Does VBS Support Simultaneous Backup of All EVS Disks on a Server?
- Do I Need to Stop the Server Before Backing Up EVS Disks on a Server Using VBS?
- How Long Does VBS Take to Back Up an EVS Disk?
- Does VBS Support Cross-Region Backup and Restoration?
- Do I Need to Stop the Server Before Restoring EVS Disk Data with a VBS Backup?
- What Is the Charging Mode of EVS Disks Created with a VBS Backup?
- Why Are CSBS Backups Displayed on the VBS Backup Page?
- Can a VBS Backup of a System Disk Be Used to Restore the System Disk of an ECS?
- Can I Use a VBS Backup to Restore an EVS Disk Whose Capacity Has Been Expanded?
- Is There a Quota Limit on the Number of Backups?
- What Can I Do In Case of Exceptions in VBS?
- Why Add Tags to a VBS Backup or Backup Policy?
- Does Backup Can Be Performed Several Times a Day?
- Can a Disk Only Be Associated With One Policy?
- What Are Full Backup and Incremental Backup?
- What Are the Differences Between Backups and Snapshots?
- Why Is the Remaining Space Not Changed After a Backup Is Deleted?
- Why Is the Disk Space Usage Displayed in the File System Different from the Backup Size?
- Why Does the Retention Rule Not Take Effect After Being Modified?
- How Do I Disable Automatic Backup?
- Videos
- Glossary
-
More Documents
-
User Guide (Paris)
- Service Overview
- Getting Started
- Operation Guide
-
FAQs
- Does VBS Support Simultaneous Backup of All EVS Disks on a Server?
- Do I Need to Stop the Server Before Backing Up EVS Disks on a Server Using VBS?
- Does VBS Support Cross-Region Backup and Restoration?
- Do I Need to Stop the Server Before Restoring EVS Disk Data with a VBS Backup?
- What Is the Charging Mode of EVS Disks Created with a VBS Backup?
- Why Are CSBS Backups Displayed on the VBS Backup Page?
- Can a VBS Backup of a System Disk Be Used to Restore the System Disk of an ECS?
- Can I Use a VBS Backup to Restore an EVS Disk Whose Capacity Has Been Expanded?
- Is There a Quota Limit on the Number of Backups?
- What Can I Do In Case of Exceptions in VBS?
- Can a Disk Only Be Associated With One Policy?
- What Are Full Backup and Incremental Backup?
- What Are the Differences Between Backups and Snapshots?
- Why Is the Remaining Space Not Changed After a Backup Is Deleted?
- Troubleshooting Cases
- Change History
-
API Reference (Paris)
- Before You Start
- API Overview
- Calling APIs
- Getting Started
-
API Description
-
VBS Backups
- Creating a VBS Backup
- Deleting a VBS Backup (Deprecated)
- Restoring a Disk Using a VBS Backup
- Creating a VBS Backup (Native OpenStack API)
- Querying Summary Information About VBS Backups (Native OpenStack API)
- Querying Details About VBS Backups (Native OpenStack API)
- Querying Details About a VBS Backup (Native OpenStack API)
- Querying the Job Status
- Deleting a VBS Backup (Native OpenStack API)
- Restoring a Disk Using a VBS Backup (Native OpenStack API)
-
Backup Policies
- Creating a Backup Policy
- Querying Backup Policies
- Modifying a Backup Policy
- Deleting a Backup Policy
- Associating Resources with a Backup Policy
- Disassociating Resources from a Backup Policy
- Executing a Backup Policy At Once
- Enabling or Disabling a Backup Policy
- Querying Backup Jobs Triggered by a Backup Policy
-
VBS Backups
- Appendix
- Change History
-
User Guide (Paris)
- General Reference
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What Are the Differences Between Backups and Snapshots?
Both backups and snapshots provide data redundancy for EVS disks to improve data reliability. Table 1 lists the differences between them.
Technology |
Saved In |
Synchronization |
DR Range |
Service Recovery |
---|---|---|---|---|
Backup |
Backup data is stored in OBS, instead of EVS disks. This realizes data restoration upon EVS disk data loss or corruption. |
A backup is the data copy of an EVS disk at a given point in time. VBS provides automatic backup by configuring backup policies. Deleting an EVS disk will not clear its backups. |
A snapshot and its source EVS disk reside in the same AZ. |
Data can be recovered and services can be restored by restoring the backup data to original disks or creating new disks from backups, ensuring superb data reliability. |
Snapshot |
Snapshot data is stored with EVS disk data.
NOTE:
Creation of and rollback to snapshots are faster than creation of and restoration from backups, because the latter requires data migration that consumes extra time. |
A snapshot is the state of an EVS disk at a specific point in time. When you delete an EVS disk, the snapshots of the EVS disk are also deleted. |
A snapshot and its source EVS disk reside in the same AZ. |
You can use a snapshot to roll back its original EVS disk or create an EVS disk for data restoration and service recovery. |
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