A decision framework for Amazon Neptune availability

A decision framework maps Amazon Neptune availability patterns to RTO, RPO, and operational complexity targets. It covers writer unavailability causes, Neptune's Multi-AZ SLA (raised from 99.9% to 99.99% in April 2025), Global Database multi-Region replication, manual switchover and failover mechanisms, write durability options during cross-Region recovery (SQS/Kinesis queues vs. DynamoDB Global Table write-ahead logs), and single-Region patterns like blue/green deployments, cache-first architecture, and pre-computed graph results. A summary table ties each pattern to expected RTO, RPO, and complexity so teams can layer resilience incrementally.

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