Programming
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You're reading from  Building Enterprise JavaScript Applications

Product typeBook
Published inSep 2018
Reading LevelIntermediate
PublisherPackt
ISBN-139781788477321
Edition1st Edition
Languages
JavaScript
Tools
ElasticsearchReact
Concepts
Application Development
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Author (1)
Daniel Li
Daniel Li
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Daniel Li

Daniel Li is a full-stack JavaScript developer at Nexmo. Previously, he was also the Managing Director of Brew, a digital agency in Hong Kong that specializes in MeteorJS. A proponent of knowledge-sharing and open source, Daniel has written over 100 blog posts and in-depth tutorials, helping hundreds of thousands of readers navigate the world of JavaScript and the web.
Read more about Daniel Li

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High reliability

Reliability is a measure of the confidence in a system, and is inversely proportional to the probability of failure.

Reliability is measured using several metrics:

  • Mean time between failures (MTBF): Uptime/number of failures
  • Mean time to repair (MTTR): The average time it takes the team to fix a failure and return the system online

Testing for reliability

The easiest way to increase reliability is to increase test coverage of the system. This is, of course, assuming that those tests are meaningful tests.

Tests increase reliability by:

  • Increasing MTBF: The more thorough your tests, the more likely you'll catch bugs before the system is deployed.
  • Reducing MTTR: This is because historical test results inform you of the last version which passes all tests. If the application is experiencing a high level of failures, then the team can quickly roll back to the last-known-good version.
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Building Enterprise JavaScript Applications
Published in: Sep 2018Publisher: PacktISBN-13: 9781788477321
© 2018 Packt Publishing Limited All Rights Reserved

Author (1)

author image
Daniel Li

Daniel Li is a full-stack JavaScript developer at Nexmo. Previously, he was also the Managing Director of Brew, a digital agency in Hong Kong that specializes in MeteorJS. A proponent of knowledge-sharing and open source, Daniel has written over 100 blog posts and in-depth tutorials, helping hundreds of thousands of readers navigate the world of JavaScript and the web.
Read more about Daniel Li

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