- What's New
- Service Overview
- Getting Started
- User Guide
-
Best Practices
- Using a Custom Script to Implement Consistent Backup for MySQL
- Using a Custom Script to Implement Consistent Backup for SAP HANA
- Using a Custom Script to Implement Consistent Backup for Other Linux Applications
- Troubleshooting a Custom Script Error
- Verifying the Application-Consistent Backup Result (Linux)
- Verifying the Application-Consistent Backup Result (Windows)
- Protecting SQL Server in Failover Cluster Mode
- Protecting SQL Server in Always on Availability Groups Mode
- Change History
- API Reference
-
FAQs
-
About Concepts
- What Is CSBS?
- What Are Full Backup and Incremental Backup?
- What Is Consistent Backup?
- What Are the Differences Between CSBS and VBS?
- What Is a Backup Policy?
- What Are the Differences Between Backup and Disaster Recovery?
- What Are the Differences Between Backup and Snapshot?
- Why Is the Disk Space Usage Displayed in the File System Different from the Backup Size?
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About Pricing
- How Is CSBS Billed?
- How Do Yearly/Monthly Resource Packages Function When I Have Bought More Than One?
- Are CSBS and VBS Resource Packages Interoperable Between CSBS and VBS?
- Why Am I Charged in Pay-per-use Mode Although I Have Purchased Resource Package?
- What Exactly Are the Function Package and the Storage Package?
- Will the CSBS Backups Displayed on the VBS Page Be Charged Repeatedly?
- How Do I Query CSBS Pay-Per-Use Billing Details?
- Why Is the Fee Deducted After a Backup Is Deleted?
- How Do I Disable CSBS?
- How Do I Stop CSBS from Charging?
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About Backup
- Does CSBS Support Backing Up All EVS Disks on an ECS?
- Do I Need to Stop the ECS Before Backing It Up?
- Can an ECS with Application Systems Be Backed Up?
- What Are the Minimum Backup Frequency and Maximum Number of Retained Backups Supported by CSBS?
- How Can I Distinguish Automatic Backups From Manual Backups?
- How Can I Configure a Backup Policy?
- Can I Choose to Back Up Only Some Partitions of a Disk?
- Does CSBS Support Cross-Region Backup for ECSs?
- Which Types of Databases Can Be Backed Up Using Database Server Backup?
- How Do I Select Among Database Server Backup, Cloud Server Backup, and Disk Backup?
- How Do I Migrate ECS Data Across Regions Using CSBS?
- Which Time Zone Is the Automatic Backup Time Based On?
- What Can I Do If a Backup Cannot Be Deleted?
- About Restoration
- Others
-
About Concepts
- Troubleshooting
- Videos
- Glossary
-
More Documents
-
User Guide (Paris and Amsterdam Regions)
- Service Overview
- Getting Started
- Management Operations
-
FAQs
- About Concepts
-
About Backup
- Does CSBS Support Backing Up All EVS Disks on an ECS?
- Do I Need to Stop the ECS Before Backing It Up?
- Can an ECS with Application Systems Be Backed Up?
- What Are the Minimum Backup Frequency and Maximum Number of Retained Backups Supported by CSBS?
- How Can I Distinguish Automatic Backups From Manual Backups?
- Does CSBS Support Cross-Region Backup for ECSs?
- About Restoration
- Others
- Troubleshooting Cases
- Change History
- API Reference (Paris and Amsterdam Regions)
-
User Guide (Paris and Amsterdam Regions)
- General Reference
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What Are the Differences Between Backup and Snapshot?
Both backup and snapshot 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. CSBS provides automatic backup by configuring backup policies. Deleting an EVS disk will not clear its backups. |
A backup 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. 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. |
Data can be recovered and services can be restored by rolling back the snapshot data to original disks or creating new disks from snapshots. |
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