What it Takes to Recover a 100 TB Postgres Database in AWS RDS

AWS RDS provides two primary mechanisms for failure recovery: snapshot-based backup and recovery (with WAL replay) and multi-AZ standbys. However, these mechanisms have limitations, particularly at large scales. For example, restoring a 100 TB snapshot and replaying WAL can take hours, while replication lag in Multi-AZ mode can lead to stale data and downtime. In contrast, Neon's managed Postgres service offers instant point-in-time recovery (PITR) without snapshot restores or WAL replays, built-in high availability without dedicated standby instances, and storage-level redundancy. Neon eliminates the need for full-size replicas, ensuring multi-AZ redundancy without doubling costs, and provides a safer recovery process with time-travel queries. By using Neon, teams can achieve faster PITR, reduce infrastructure costs, and minimize single points of failure, ultimately preserving trust and revenue.

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