Autoscaling Best Practices – Unforunately several websites have succumb to the Black Friday shopping frenzy. Autoscaling takes advantage of the elasticity of cloud-hosted environments while easing management overhead. It reduces the need for an operator to continually monitor the performance of a system and make decisions about adding or removing resources.
There are two main ways that an application can scale:
Vertical scaling, also called scaling up and down, means changing the capacity of a resource. For example, you could move an application to a larger VM size. Vertical scaling often requires making the system temporarily unavailable while it is being redeployed. Therefore, it’s less common to automate vertical scaling.
Horizontal scaling, also called scaling out and in, means adding or removing instances of a resource. The application continues running without interruption as new resources are provisioned. When the provisioning process is complete, the solution is deployed on these additional resources. If demand drops, the additional resources can be shut down cleanly and deallocated.
Many cloud-based systems, including Microsoft Azure, support automatic horizontal scaling.
Learn more about autoscaling best practices.
https://docs.microsoft.com/en-us/azure/architecture/best-practices/auto-scaling
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