Redis Data Migration

Redis Migration

Possible use cases

• Copying Database in same redis cluster

  • Easily achieved riot-redis opensource tool.

• Copying database between two clusters of same vpc

  • We can use riot-redis tool to copy given db between two clusters of same vpc

• Copying database between two clusters of different vpc

  • First take a snapshot of the cluster

  • Restore it with the vpc configuration that you want the data to be copied

  • Now use riot-redis tool to copy between two clusters of same vpc

• Also read about SWAPDB, if you want to swap dbs of the cluster.

Install riot-redis

• Launch an EC2 ubuntu instance which has access to the redis cluster

• Install java, since riot-redis needs it.

sudo apt update
sudo apt install default-jre

• Download riot-redis source from this link. Unzip and copy to the desired location.
• Now launch bin/riot-redis

Live mode

• You need keyspace-notifications enabled for live mode. Ref: Enable Keyspace-notifications
• To replicate specific db in live mode, run below command

bin/riot-redis -h <src host> -p <src port> --db <src db index> replicate -h <dest port> -p <dest port> --db <dest db index> --mode live

Normal Mode

• To replicate specific db without applying live changes

bin/riot-redis -h <src host> -p <src port> --db <src db index> replicate -h <dest port> -p <dest port> --db <dest db index>

References

• Migrating from Elastic Cache Redis
• riot-redis
• Elastic Cache Redis restricted commands