Automatically increase or decrease servers

Question

I developed an app, both app server and database server(NoSQL) are distributed. app server and database server are on cloudy(AWS or Azure), and both I have backup the snapshot of them.

I'm just wondering, is it possible automatically increase or minus servers base on the online user amount?

I know there are some tech(pippet juju), but I hope it can be

let my app monitor the amount of online users, if it exceeds the limitation(the limitation is base on my test to get), my app can call its api to establish a new cloudy server and copy the snapshot of app server or database server to it.

If user amount is quite lower than current servers limitation, it will led the new user to some Integration server until removing the server has no user.

Usually that's done based on CPU load. Is there a reason you want to do it based on user count? — Joachim Isaksson, Jun 14 '14 at 14:23
Do either of [these](http://blogs.msdn.com/b/agile/archive/2013/07/02/windows-azure-autoscaling-now-built-in.aspx) [two](http://aws.amazon.com/autoscaling/) links answer your question? — Joachim Isaksson, Jun 14 '14 at 14:38
It looks like AWS/AZURE must provide the api, thanks, I will accept your correct answer if you reply as answer — arachide, Jun 14 '14 at 14:56

score 2 · Accepted Answer · answered Jun 14 '14 at 15:04

2

Both Azure and AWS provide auto scaling as a part of their infrastructure.

Both cloud providers can scale automatically based on CPU usage, but if you need custom scaling you may need to write some custom code to work directly with their respective APIs.

answered Jun 14 '14 at 15:04

Joachim Isaksson

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Automatically increase or decrease servers

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