Inside Amazon EC2


A few weeks ago, [[http://amazon.com|Amazon]] quietly launched the [[http://aws.amazon.com/ec2|Elastic Compute Cloud]] service (beta, of course). I had been dying to get my hands on an account since then and just today I got my confirmation email. I wasn’t really expecting something like this from Amazon (though after [[http://aws.amazon.com/s3|S3]], it wasn’t too unexpected), so I was even more intrigued. And when I found out that EC2 was running off of [[http://www.cl.cam.ac.uk/Research/SRG/netos/xen/|Xen]], I was just blown away!

Anyways, so here are my notes so far:

* the [[http://docs.amazonwebservices.com/AmazonEC2/gsg/2006-06-26/|documentation]] is excellent, so I won’t waste your time and mine going over it again. Everything worked out of the box for me.
* Yes, they //are// running Xen.
* The getting started image comes with 9G of disk on the root partition and an additional whooping **140G** on /mnt. /mnt doesn’t seem to be network mounted (unless its a networked block device) though.
* The VM has a //lot// of RAM. My VM shows me 1.8G of RAM. Thats more than what I have on my laptop!!!
* The VM sees a 2.4-GHz uni-processor AMD Opteron. So Amazon is not using Intel machines for their cluster. Thats interesting.
* As far as I can tell, they are running just **two VMs per physical machine**, with 50% hard reservations for each of the VMs.

More later.

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