2 posts tagged with "mongodb"

Geo-sharding is one of the features that makes MongoDB attractive for a global product. You keep each user's data physically close to them, one logical collection still reads as a single dataset in Compass or Atlas, and the adoption cost looks tiny: add a shard key, and queries route to the right region.

The simplicity is real. So is the failure mode hiding inside it. This is a field story about how "easy" geo-sharding quietly doubled a database bill — and why that was never MongoDB's fault.

When building distributed systems, the "Database per Service" rule is often seen as a strict rule. The common instinct is to create a separate physical database cluster for each microservice to ensure full isolation. However, as your system expands, managing dozens or hundreds of independent database servers can quickly become an operational nightmare.