Running a 'medium' EC2 instance

[Robert Collins]

On Wed, 2009-12-02 at 13:54 -0600, John Arbash Meinel wrote:
> So one alternative is to get everything set up so that we can start and
> stop these instances on demand. Certainly I would expect to use far less
> than 24x7 of the instance. More like 8x1 or so. Which would drop the
> monthly cost to something like $10/mo even for the medium cpu instance.
> 
> I was also wondering how we could hook up this sort of thing to
> buildbot/hudson. I believe Vincent mentioned that hudson has support for
> starting a slave, waiting for it to get ready, then having it run
> commands, and then shut itself down. If that is true, then it seems like
> a rather good fit for our usage. Running for 1-2hrs / day including
> startup, running, and shutdown times seems quite reasonable.

Hudson's ec2 plugin can provision automatically, on demand. They have a
very inclusive contributor policy - if need something changed we can
probably get you commit rights really easily ;) - I already have them.

> It would also mean that starting up a build host wouldn't interfere with
> the test suite running, since they could be run on separate instances.
> 
> What do you guys think? I don't think we want to pay $200/month to keep
> a live server running. But is it worth the effort getting the ability to
> start up instances on demand?

On demand - yes, absolutely.

-Rob
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