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Build a multi-Region session store with Amazon ElastiCache for Valkey Global Datastore

  • The article discusses building a multi-Region session store with Amazon ElastiCache for Valkey Global Datastore.
  • The solution offers a unified database caching layer for application servers and secure cross-Region replication.
  • ElastiCache Global Datastore allows writing to one cluster and reading from two other cross-Region replica clusters.
  • It enables low-latency reads and disaster recovery across Regions.
  • The article explains how to evolve a caching architecture from a single Region to a multi-Region setup.
  • This transition involves duplicating infrastructure to a second Region and utilizing AWS Global Accelerator for optimal connectivity.
  • Challenges of a cross-Region caching layer are discussed focusing on dataset sharing between Regions.
  • To address these challenges, adopting the ElastiCache Global Datastore feature is recommended.
  • The article provides insights on implementing ElastiCache for Valkey Global Datastore for secure cross-Region replication.
  • It includes detailed steps on configuring VPC peering or using AWS Transit Gateway for cross-Region connectivity.
  • An automation solution using AWS Lambda and Route 53 is introduced for updating DNS records upon global datastore failover.

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