<div dir="ltr"><div style="font-family:arial,sans-serif;font-size:12.800000190734863px">Hi,</div><div style="font-family:arial,sans-serif;font-size:12.800000190734863px"><br></div><div style="font-family:arial,sans-serif;font-size:12.800000190734863px">
IaaS is all about elastic computing. I can stretch resources as per my need - increasing/decreasing the number of cores, RAM allocated etc..<br></div><div style="font-family:arial,sans-serif;font-size:12.800000190734863px">
<br></div><div style="font-family:arial,sans-serif;font-size:12.800000190734863px">My question is - how does openStack achieve this elasticity for both computation and RAM.<br><br></div><div style="font-family:arial,sans-serif;font-size:12.800000190734863px">
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..<br>
<br></div><div style="font-family:arial,sans-serif;font-size:12.800000190734863px">Using openStack - <br><br>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.<br>
<br>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 ?</div></div>