How Do I Migrate Memcached Data?
Memcached does not provide commands for traversal data query. Therefore, you cannot directly export data from your Memcached and migrate the data to a DCS Memcached instance.
Record cache keys through logging of your application systems, extract key-value data, and write the data to a DCS Memcached instance, achieving gradual data migration.
By using some open-source tools, you can run the stats cachedump command of Memcached and perform get operations to query partial key-value data stored in your Memcached. However, you can only query key data not greater than 2 MB (including the size of all keys queried and additional information with a size of more than 20 bytes for each key) by using this command. Therefore, you cannot use such tools or similar methods for data migration.
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?
- Can I Export Backup Data of DCS Redis Instances to RDB Files on the Console?
- 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
- How Do I Migrate Memcached Data?
- Can I Migrate Data Between DCS Memcached and Redis Instances?
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