Amazon Machine Instance Start/Stop = Graceful OS Level Restart?

Hello,

I know there are billing difference and hardware auto migration differences between a Windows OS restart VS an AMI console stop/start command.  But I am wondering if a stop/start command is the same as a graceful Windows OS based restart command?

I noticed that while I am RDP'd into a Windows AMI and I stop it, it kills the session immediately, IE you don't see a windows message saying that its restarting.

I have spent a reasonable amount of time trying to find an explicit answer if stop/start = graceful OS level restart.   I am guessing I am not finding the answer because my question context is wrong and its not, and thats why there is also and Amazon console reboot option.  Is this correct?

Finally, I am guessing since it is not a graceful restart, it leaves the OS vulnerable to all of the same problems you would have if you ungracefully power cycled a physical server?

Thanks for the help.
CnicNVAsked:
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Duy PhamFreelance IT ConsultantCommented:
I do think that AWS stops the server gracefully. Out application is currently hosted in AWS, and we have some on-demand instances configured as 'sleep agents' which will only be started when request comes in. In those instances, we have a service that performs an action on shutdown, and from service log, we can see that on-demand instances are always shutdown properly when we stop them using AMI.
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CnicNVAuthor Commented:
Ok thanks for the info:)
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