How to choose size for a cloud server (rackspace)

Posted by Emil on Server Fault See other posts from Server Fault or by Emil
Published on 2009-11-15T17:48:40Z Indexed on 2010/05/15 19:34 UTC
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Filed under:

rackspace

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cloud-computing

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scaling

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memory

We're going to test the rackspace cloud next week to see how it's working with our web app. It's a LAMP environment with a lot of MySQL databases.

How do I choose the "right" server size? On Rackspace I can choose slices with the memory of 256, 512, 1024, 2048, 4096 etc.

Right now we don't have a lot of traffic (approx. 1000 visitors/day) but I thought the whole "cloud" idea was to not be limited and auto scale.

Update: What I'm looking for is now a specification of what I need. I know it's too complex. I'm looking for examples, case studies etc. It would be interesting to hear something like "Yes we're serving 10 000 daily requests without spikes on a LAMP stack with only one slice on with 2 GB RAM".

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