Amazon ElastiCache for Valkey now supports durability

Amazon Web Services has announced durability support for Amazon ElastiCache for Valkey, enabling the caching service to handle workloads that require both microsecond read latency and zero tolerance for data loss. The new feature stores data durably across multiple Availability Zones using a Multi-AZ transactional log, providing fast failover, database recovery, and node restart capabilities to prevent data loss during failures. The durability feature offers two configuration options: synchronous writes that persist data across at least two AZs before responding to clients with single-digit millisecond write latency, and asynchronous writes that maintain microsecond write latency by persisting data after client responses, though potentially losing up to 10 seconds of uncommitted data during rare failures. Both options preserve microsecond read performance while expanding ElastiCache's use cases beyond traditional caching to include AI agent memory systems, payment tokenization, and real-time inventory management. The durability capability is available across all AWS commercial, China, and GovCloud regions starting with Valkey 9.0, and can be configured through the AWS Management Console, SDK, or CLI when creating new ElastiCache clusters.