What is a "Cluster" and what is a "Collection"?

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What is a “Cluster” and what is a “Collection”?

My experience with MongoDB has so far been interesting. After signing up, I got an email from someone at MongoDB to have a meeting to discuss setting things up and getting started. During our conversation, I found myself more confused rather than less and after starting the Introduction online course I found it made me think that I had my definition of a Cluster and a Collection wrong.

Here is a screenshot to explain what I mean:

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A Cluster is multiple instances of MongoDB code running to form one server instance via sharding and/or replication. This is how you scale and protect data services.

A Collection is the MongoDB equivalent of a SQL relational database TABLE.

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Since you are starting from scratch, you should work your way through the free MongoDB courses here: https://learn.mongodb.com/

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