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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 availability

Availability is a measure of the proportion of time that a system is able to fulfill its intended function. For an API, it means the percentage of time that the API can respond correctly to a client's requests.

Measuring availability

Availability is usually measured as the percentage of time the system is functional (Uptime) over the total elapsed time:

This is typically represented as "nines". For example, a system with an availability level of "four nines" will have an uptime of 99.99% or higher.

Following the industry standard

Generally speaking, the more complex a system, the more things can go wrong; this translates to a lower availability. In other words, it is much easier to have a 100% uptime for a static website than for an API.

So, what is the industry standard for availability for common APIs? Most online platforms offer a service level agreement (SLA) that includes a clause for the minimum availability of the platform. Here are some examples (accurate at the time...

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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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