PlanetScale backs up petabyte-scale sharded Postgres at 50+ GB/s in parallel
PlanetScale's backup system treats every shard as a worker: it spins up one EC2 instance per shard to pull snapshots from S3 and replay WAL, then freezes a consistent point-in-time copy. This keeps heavy backup work off production nodes and scales to petabyte databases at over 50 GB/s.