Day 3: Replica Sets, Sharding, GeoSpatial, and GridFS
Mongo has a powerful ability to store and query data in a variety of ways. But then again, so can other databases. What makes document databases unique is their ability to efficiently handle arbitrarily nested, schemaless data documents. What makes Mongo special in the realm of document stores is its ability to scale across several servers, by replicating (copying data to other servers) or sharding collections (splitting a collection into pieces) and performing queries in parallel. Both promote availability.
Replica Sets
Mongo was built to scale out, not to run stand-alone. It was built for ...
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