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From Gaurav Aradhye <gaurav.arad...@clogeny.com>
Subject Re: Scaling up cpu and memory of user vm above host capacity
Date Tue, 01 Oct 2013 07:02:18 GMT
Thanks David. That disabuses my confusion about the CPU provisioning. I was
using the wrong API to scale up the virtual machine, so above observations
stand invalid till I get the same results with the right API.

About over-provisioning, I have the over provisioning factor set as 1 both
in case of CPU and memory.

Regards,
Gaurav


On Mon, Sep 30, 2013 at 10:55 PM, David Ortiz <dportiz@outlook.com> wrote:

> A machine won't be able to support more cores on a VM than the physical
> processor.  That should result in problems trying to deploy it.  I'm
> guessing the service offering is still valid since you could add a host
> later which has a hex core or two cpus in it.  As far as RAM goes, do you
> have overprovisioning enabled?
>
> > From: gaurav.aradhye@clogeny.com
> > Date: Mon, 30 Sep 2013 14:00:04 +0530
> > Subject: Scaling up cpu and memory of user vm above host capacity
> > To: dev@cloudstack.apache.org
> >
> > Hi,
> >
> > I am trying to automate a scenario here. I have only one host in cluster
> > with 4 CPU cores and 15 GB total memory. When I try to scale up cpu and
> RAM
> > of a running user vm above the host capacity, it doesn't throw any error
> > and I can see the updated values in VM statistics too.
> >
> > For CPU, I am able to change the service offering of user vm as  5 cores
> *
> > 100 MHz (even though host has 4 cores). I am not sure how this
> calculation
> > is done. Definitely many no. of virtual cores can be formed on host (more
> > than 4), but is it possible to allocate 5 cores to single VM ? When I try
> > to deploy new VM with 5 core CPU service offering, then in this case it
> > fails saying not enough server capacity.
> >
> > Also, For memory, I am able to create 17 GB memory service offering and
> > allocate it to any running user vm (although the total memory on host is
> 15
> > GB).
> >
> > Any directions? Is this an issue or am I missing something here?
> >
> > Regards,
> > Gaurav
>
>

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