Should I split NoSQL database on separate servers?

The idea of (most) NoSQL products is that they provide horizontal scalability. This means that you single logical instance could be on dozens of servers. In MongoDB, for example, you can use auto-sharding .

For your program, this is completely transparent: Your code is (almost) the same you'd use for a single database server, but the data resides on, say, 5 servers.

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