问题
My azure cloud service, when it scales down say from 3 to 2 instances, my site becomes unresponsive for a few minutes?
I was under the impression, and I may be wrong that my existing instances would be left intact (except those that are being removed) and my site would continue to function as normal?
Is this normal behavior?
回答1:
This is expected behavior when you scale down from 2 instances to 1 as you are no longer in the SLA-backed world.
This is also expected behavior if the RoleEnvironmentChanging event of your WebRole sets e.Cancel to "true" which forces instance-reboots during a scaling event.
Otherwise, scale-down actions should not cause interruptions to your site
来源：https://stackoverflow.com/questions/16907000/azure-cloud-service-becomes-unresponsive-when-instances-are-removed