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From Ram Ganesh <Ram.Gan...@citrix.com>
Subject RE: AutoScale feature....
Date Mon, 02 Jul 2012 18:08:25 GMT
Hi All,

Briefly talking about the feature - AutoScale feature allows you to scale up or scale down
the virtual instances that are being load balanced by load balancers like NetScaler based
on certain conditions. This feature is an extension to the ELB feature in CloudStack. This
feature is similar to AWS autoscale feature except that monitoring of server's(guest vm) health
is done by load balancers like NetScaler and provisioning is done by CloudStack. Monitoring
done by loadbalancers has couple of benefits
	- Loadbalancers are better placed to understand the health of the  server as traditionally
LB devices had monitoring capability inbuilt in it.
	- Decisions can be based not just on certain conventional counters like CPU, Memory etc but
also on network counters like response time, bandwidth, connections etc
	- Decreases the load on CloudStack management server.

Thanks,
Ram


> -----Original Message-----
> From: Ram Ganesh
> Sent: 02 July 2012 22:51
> To: 'cloudstack-dev@incubator.apache.org'
> Subject: AutoScale feature....
> 
> Hi All,
> 
> Please find the draft functional specs for AutoScale feature here -
> http://wiki.cloudstack.org/display/DesignDocs/Auto+Scale+Feature .
> Please review and let us know your feedback
> 
> Thanks,
> Ram


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