is it possible to aggregate physical resources in order to obtain a vm with more resources than each physical server makes available?

asked 2015-01-29 16:14:29 -0600

Loris Ponga gravatar image

let's sasy that I've three physical servers with 2 processors and 8gb ram each. If I install openstack on them, over openstack can I create a virtual machine with 4 processors and 16 Gb of ram?

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answered 2015-01-29 20:32:01 -0600

There is no mechanism to aggregate two physically separate compute nodes into a sum of resources that a virtual machine can then run on top of. You can however over provision on a compute node so in your example of a compute node with 2 processors and 8GB of ram you could over provision to 4 CPU and 16GB of ram. However you will need to track resource usage closely given you are over provisioned.

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Asked: 2015-01-29 16:14:29 -0600

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Last updated: Jan 29 '15