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From Koushik Das <koushik....@citrix.com>
Subject [DISCUSS] Scaling up CPU and RAM for running VMs
Date Sat, 15 Dec 2012 17:43:52 GMT
Currently CS supports changing CPU and RAM for stopped VM. This is achieved by changing compute
offering of the VM (with new CPU and RAM values) and then starting it. I am planning to extend
the same for running VM as well. Initially planning to do it for Vmware where CPU and RAM
can be dynamically increased. Support of other HVs can also be added if they support increasing
CPU/RAM.

Assuming that in the updated compute offering only CPU and RAM has changed, the deployment
planner can either select the same host in which case the values are dynamically scaled up
OR a different one in which case the operation fails. In future if there is support for live
migration (provided HV supports it) then another option in the latter case could be to migrate
the VM first and then scale it up.

I will start working on the FS and share it out sometime next week.

Comments/suggestions?

Thanks,
Koushik

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