What Should I Consider for Online Migration?
- Network
Before online migration, ensure that the network configured for the migration task is connected to source and target Redis instances.
- Tool
Use the online migration function provided on the DCS console.
- Data integrity
If you suspend your services for data migration, check the data volume and main keys after the migration.
If you do not suspend your services, migrate data incrementally.
- Impact of capacity expansion of the source instance
During online migration, expanding the source instance's capacity may affect the migration or customer data. If the memory of the source instance becomes insufficient during the migration, stop the migration task and then expand the capacity.
- Timing
- Version restrictions
You can migrate data from an earlier version to a later version, and vice versa, but you need to check whether the target instance supports the commands used in your service systems.
- Multi-DB
If both the target and source are Proxy Cluster DCS instances, ensure that the multi-db parameter settings of the two are the same. Otherwise, the migration will fail.
Data Backup, Export, and Migration FAQs
- Can I Migrate Data from a Lower Redis Version to a Higher One?
- What Should I Consider When Transferring or Operating Data Between Different OSs?
- Can I Migrate Data from a Multi-DB Source Redis Instance to a Cluster DCS Redis Instance?
- What Are the Constraints and Precautions for Migrating Redis Data to a Cluster Instance?
- What Should I Consider for Online Migration?
- Can I Perform Online Migration Without Any Service Interruption?
- What If "Disconnecting timedout slave" and "overcoming of output buffer limits" Are Reported on the Source Instance During Online Migration?
- How Do I Export DCS Redis Instance Data?
- Why Is Memory of a DCS Redis Instance Unchanged After Data Migration Using Rump, Even If No Error Message Is Returned?
- Where Are DCS Instance Backup Files Stored? How Many of Them Can Be Stored?
- Is All Data in a DCS Redis Instance Migrated During Online Migration?
- When Will AOF Rewrites Be Triggered?
- What Are the Common Causes of Redis Migration Failures?
- Can I Migrate Data to Multiple Target Instances in One Migration Task?
- How Do I Enable the SYNC and PSYNC Commands?
- Will the Same Keys Be Overwritten During Data Migration or Backup Import?
- Why Does Redis Cluster Migration Fail If It Uses Built-in Keys and Cross-Slot Lua Scripts?
- Handling Migration Errors
- Troubleshooting Data Migration Failures
Feedback
Was this page helpful?
Provide feedbackThank you very much for your feedback. We will continue working to improve the documentation.
more