On Wed, Feb 25, 2009 at 8:09 AM, peterk <peter.ke...@gmail.com> wrote:
>
> Maybe I'm misunderstanding you, but since when was it free to run a
> EC2 instance?
>
> EC2 Small Instance per CPU Hour is $0.10 (same as GAE's cost 'per CPU
> hour')
> EC2 outgoing bandwidth is $0.17 per GB for the first Terabyte out. S3
> outgoing bandwidth is the same cost for the first 10TB out. GAE is
> $0.12 per GB out.
> S3 storage is $0.15 per GB for the first 50TB. GAE is $0.15 per GB.
>
> I'm still reading, we may be comparing apples to oranges anyway with
> regard to CPU time. Does CPU time on GAE cost if your application
> isn't actually in use, or do you pay literally just for the cumulative
> number of seconds your app spends actually executing? On EC2 you have
> to keep an instance running 24/7 to host a site.
>
> Anyway, I need to go back reading the fine print. But on the face of
> it it looks very competitive, particularly if CPU charges are more
> granular than EC2.

Indeed, App Engine's CPU accounting is extremely granular. We measure
the amount of CPU used for every request individually and add that to
our overall accounting. Your app does not consume resources and you do
not pay for anything if your application is not in active use!

For example, if your application uses 360 seconds of CPU time beyond
the free quota limits on a single day, you would only be charged for
one cent of usage ($0.10/CPU-hour * 360 = $0.01).

-Brett

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