[colug-432] Cloud services and security

R P Herrold herrold at owlriver.com
Mon Feb 7 15:12:30 EST 2011

On Mon, 7 Feb 2011, Travis Sidelinger wrote:

> Also, Amazon may very well offer static IP services, but at 
> least one of the cloud solutions we would like to use does 
> not want to cooperate.

I think part of the issue is solving the complexity of routing 
and fail-across.  If one can run an abstracting intermediate 
layer of IP, and then using dedicated links to deliver IP 
content to a endpoint, one can shift load and migrate a 'hot' 
image between geographically discrete datacenters, hopefully 
fast enough that the end consumer does not 'lose state'

Having worked on this, it is not at all clear that hot image 
migration is a better solution than having an 'A and 'B peer 
heartbeating one another, and running short DNS expirations

[We can migrate pmman.com client images between three 
locations here in town, but the image transit times are long 
enough that it is noticeable -- effective transfer data rates 
of say 50 MBy/Sec, but with a 8 GBy image, that's still over 
two minutes]

-- Russ herrold

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