Open Stack

Thanks Cristian,

Will elasticity  be limited to 4 Cores/4GB  (The max capacity of a physical
host) ?


On Mon, Dec 23, 2013 at 5:00 PM, Cristian Falcas <cristi.falcas at gmail.com>wrote:

> Hi,
>
> From what I know you can resize a machine, but this involves
> rebuilding the instance: openstack will create a snapshot of the
> machine an recreate the instance with the new snapshot and a new
> flavor. This is not very fast from my experience, so you will have a
> considerable downtime doing this, depending on the size of the current
> instance and how fast is your storage.
>
> Best regards,
> Cristian Falcas
>
>
>
> On Mon, Dec 23, 2013 at 12:03 PM, Vikas Parashar <para.vikas at gmail.com>
> wrote:
> > Hi,
> >
> > IaaS is all about elastic computing. I can stretch resources as per my
> need
> > - increasing/decreasing the number of cores, RAM allocated etc..
> >
> > My question is - how does openStack achieve this elasticity for both
> > computation and RAM.
> >
> > If I create an image with 2 cores and 4 GB RAM (and one day I need to
> > increase this to, lets say - 6 Cores and 12 GB RAM), but all the physical
> > hosts that I currently have (for Compute and RAM) at my disposal have a
> max
> > of 4 Cores and 4 GB RAM each..
> >
> > Using openStack -
> >
> > a) is this possible (as long as the total cores and total RAM required is
> > less than the group-total) ? If yes, how is this achieved.
> >
> > b) or the elasticity will be limited to 4 Cores/4GB  (The max capacity
> of a
> > physical host) ? If no, then is it possible to achieve it ?
> >
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