How do I monitor cross-Region replication lag in ElastiCache for Redis Global Datastore?

Short description

The Global Datastore feature in Amazon ElastiCache allows you to set up cross-Region replication. You can use Global Datastore to write or read to your primary ElastiCache for Redis self-designed cluster in one Region. The data that you read or write is also available to read from a secondary cross-Region replica cluster. To check a replica's lag when it applies changes from the primary node, use the ReplicationLag metric.

Resolution

1. Open the ElastiCache console.
2. From the navigation pane, choose GlobalDataStore.
3. In the Regional Clusters section, review the ReplicationLag parameter of the primary Region against the secondary Region.