How do I avoid a long time period when I scale up my ElastiCache for Redis self-designed cluster with cluster mode turned off?

Resolution

Scale your ElastiCache for Redis self-designed cluster based on the current demand. When you scale up your cluster, a new node type is created. After the new node is created, the data is replicated from the existing node to the new node type. The time period that it takes to scale up your cluster is based on the following factors:

• The amount of data in the cluster: If there's a large amount of data in the cluster, then it takes more time to replicate the data to the new node.
• The node type of the cluster: If the existing node type doesn't have enough throughput, then there can be an increase in the time it takes to scale the cluster.
• The ongoing traffic on the Redis cluster: If the existing node type is overwhelmed due to incoming traffic, then the time that it takes to replicate the data increases. It's a best practice to scale your cluster at a time period of low usage. This allows the scaling process to complete faster.

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