How Do I Export DCS Redis Instance Data?
- Master/standby, read/write splitting, and cluster instances:
These instances support backups. Perform the following operations to export data:
- On the Backups and Restorations page, view the backup tasks.
- If there is no backup, create a backup and download the backup file as prompted.
If your DCS instances were created a long time ago, the versions of these instances may not be advanced enough to support some new functions (such as backup and restoration). You can contact technical support to upgrade your DCS instances. After the upgrade, you can back up and restore your instances.
- Single-node instances:
Single-node instances do not support the backup function. You can use redis-cli to export data to RDB files. This operation depends on SYNC command.
- If the instance allows the SYNC command (such as a Redis 3.0 single-node instance), run the following command to export the instance data:
redis-cli -h {source_redis_address} -p 6379 [-a password] --rdb {output.rdb}
- If the instance does not allow the SYNC command (such as a Redis 4.0 or 5.0 single-node instance), migrate the instance data to a master/standby instance and export the data by using the backup function.
- If the instance allows the SYNC command (such as a Redis 3.0 single-node instance), run the following command to export the instance data:
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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