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You're reading from  MongoDB High Availability

Product typeBook
Published inJul 2014
Publisher
ISBN-139781783986729
Edition1st Edition
Tools
MongoDB
Concepts
Database Administration
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Afshin Mehrabani
Afshin Mehrabani
author image
Afshin Mehrabani

Afshin Mehrabani is an open source programmer. He is studying to be a computer software engineer. He started programming and web development when he was 12 years old, as well as starting with PHP. Later, he joined the Iran Technical and Vocational Training Organization. He secured the first place and received a gold medal in a competition which was conducted across the entire country in the area of web development. He became a member of the Iran National Foundation of Elite after producing a variety of new programming ideas. He was a software engineer at the Tehran Stock Exchange and is now the head of the web development team in the Yara Company. He cofounded the Usablica team in early 2012 to develop and produce usable applications. He is the author of IntroJs, WideArea, flood.js and some other open source projects. He has contributed to Socket.IO, Engine.IO, and some other open source projects. He is also interested in creating and contributing to open source applications, writing programming articles, and challenging himself with new programming technologies. He has written different articles about JavaScript, Node.js, HTML5, and MongoDB that have been published on different academic websites. Afshin has 5 years of experience in PHP, Python, C#, JavaScript, HTML5, and Node.js in many financial and stock trading projects.
Read more about Afshin Mehrabani

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Enable sharding

In order to enable sharding for a collection of data, we should enable sharding for a database first.

We should use the same mongo command-line environment to enable, deactivate, or modify database sharding. To enable sharding for a database, you can use following command:

sh.enableSharding(database)

We enable sharding for the database newdb. This is shown in the following screenshot:

If the enabling process is successful, you get the preceding message from the shell. Otherwise, you will get an error. Now that we enabled sharding for the database, the next step is to enable sharding for database collections.

The following screenshot shows the status of sharding after enabling sharding for the newdb database:

As you can see in the preceding screenshot, the partitioned field is true for the database newdb, but it's false for other databases.

Before jumping into enabling sharding for a collection of databases, you should consider one or more shard keys. MongoDB will distribute the...

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MongoDB High Availability
Published in: Jul 2014Publisher: ISBN-13: 9781783986729
© 2014 Packt Publishing Limited All Rights Reserved

Author (1)

author image
Afshin Mehrabani

Afshin Mehrabani is an open source programmer. He is studying to be a computer software engineer. He started programming and web development when he was 12 years old, as well as starting with PHP. Later, he joined the Iran Technical and Vocational Training Organization. He secured the first place and received a gold medal in a competition which was conducted across the entire country in the area of web development. He became a member of the Iran National Foundation of Elite after producing a variety of new programming ideas. He was a software engineer at the Tehran Stock Exchange and is now the head of the web development team in the Yara Company. He cofounded the Usablica team in early 2012 to develop and produce usable applications. He is the author of IntroJs, WideArea, flood.js and some other open source projects. He has contributed to Socket.IO, Engine.IO, and some other open source projects. He is also interested in creating and contributing to open source applications, writing programming articles, and challenging himself with new programming technologies. He has written different articles about JavaScript, Node.js, HTML5, and MongoDB that have been published on different academic websites. Afshin has 5 years of experience in PHP, Python, C#, JavaScript, HTML5, and Node.js in many financial and stock trading projects.
Read more about Afshin Mehrabani

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