Over a million developers have joined DZone.
{{announcement.body}}
{{announcement.title}}

Zero Downtime – What is it and why is it important?

DZone's Guide to

Zero Downtime – What is it and why is it important?

· Cloud Zone
Free Resource

Are you joining the containers revolution? Start leveraging container management using Platform9's ultimate guide to Kubernetes deployment.

For most large web applications, uptime is of foremost importants.  Any outage can be seen by customers as a frustration, or opportunity to move to a competitor.  What's more for a site that also includes e-commerce, it can mean real lost sales.

Zero Downtime describes a site without service interruption.  To achieve such lofty goals, redundancy becomes a critical requirement at every level of your infrastructure.  If you're using cloud hosting, are you redundant to alternate availability zones and regions?  Are you using geographically distributed load balancing?  Do you have multiple clustered databases on the backend, and multiple webservers load balanced.

All of these requirements will increase uptime, but may not bring you close to zero downtime.  For that you'll need thorough testing.  The solution is to pull the trigger on sections of your infrastructure, and prove that it fails over quickly without noticeable outage.  The ultimate test is the outage itself.

Sean Hull on Quora: What is zero downtime and why is it important?



Source: http://www.iheavy.com/2011/06/23/zero-downtime-what-is-it-and-why-is-it-important/

Using Containers? Read our Kubernetes Comparison eBook to learn the positives and negatives of Kubernetes, Mesos, Docker Swarm and EC2 Container Services.

Topics:

Opinions expressed by DZone contributors are their own.

{{ parent.title || parent.header.title}}

{{ parent.tldr }}

{{ parent.urlSource.name }}