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MongoDB 4 Quick Start Guide

You're reading from   MongoDB 4 Quick Start Guide Learn the skills you need to work with the world's most popular NoSQL database

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Product type Paperback
Published in Sep 2018
Publisher Packt
ISBN-13 9781789343533
Length 192 pages
Edition 1st Edition
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Author (1):
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Doug Bierer Doug Bierer
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Doug Bierer
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Toc

Sharding

Command summary:

  • sh.addShard( "host:port" )
  • sh.enableSharding( "database" )
  • sh.shardCollection( "database.collection", { field: direction } )
  • sh.status()

Whereas replication is designed to provide redundancy of data, sharding is a feature which provides horizontal scaling. This means that instead of having a single extremely powerful server (vertical scaling), you spread the data across multiple servers operating in a cluster. This facility gives you the ability to handle massive amounts of data and lends itself to the cloud environment. Not only that, but because you have a subset of the entire database residing on multiple servers, each server is then able to handle its own database tasks, thus providing a means of load balancing.

Before we cover how to implement a sharded cluster, it's important to understand how sharding operates...

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