Yes, the instance when running can only use the available resources from the compute host.
On Mon, Dec 23, 2013 at 1:35 PM, Vikas Parashar <para.vi...@gmail.com> wrote: > 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.fal...@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.vi...@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 ? >> > >> > _______________________________________________ >> > Mailing list: >> > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack >> > Post to : openstack@lists.openstack.org >> > Unsubscribe : >> > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack >> > > > _______________________________________________ Mailing list: http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack Post to : openstack@lists.openstack.org Unsubscribe : http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
