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Merge compute nodes

asked 2020-04-22 16:02:50 -0500

ebrahimtavasoli gravatar image


I'm new in OpenStack

I want to know if I have two compute node that each one has 12core CPU and 64GB RAM, Can I create 2 VMs that one of them has 18core CPU and 96GB RAM so another VM has 6core CPU and 32GB ram?

In other words, OpenStack do cluster compute nodes?

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You can do distributed storage with the likes of Ceph, but compute is on one node only, not distributed.

Sive.Host gravatar imageSive.Host ( 2020-04-23 05:01:20 -0500 )edit

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answered 2020-04-22 22:26:40 -0500

A VM runs in a single compute node. You can't "spread" it over several compute nodes.

However, you can configure a cloud to overbook CPUs, RAM and storage. This allows you to run VMs that use more resources than are available. By default, I believe the CPU overbooking factor is 1 (i.e. no overbooking), RAM is 1.5 and storage is a higher number that I forgot.

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Asked: 2020-04-22 16:02:50 -0500

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Last updated: Apr 22 '20