MongoDB
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Notes
- MongoDB 6 MongoDB stores JSON-like documents (BSON) in collections, with no schema required by the server.
- MongoDB — Indexes 6 Indexes turn a collection scan into a B-tree lookup.
- MongoDB — Aggregation Pipeline 7 A multi-stage data-processing language. Each stage takes documents in and emits documents out.
- MongoDB — Transactions, Read & Write Concerns 6 MongoDB transactions are atomic at the single-document level by default.
- MongoDB — Replica Sets and Sharding 7 Replication for HA + read scaling; sharding for write scaling + data volume.
- MongoDB — Pitfalls and Performance 7 Common production traps and the senior-level fixes.