Currently Secondary storage in CloudStack plays key role in areas like snapshot, template management and also to some extent volume management too.But there exists well known performance limitations, especially in huge clouds with hosts spread across multiple pods, associated with secondary storage available across entire zone.Users often complain about slower snapshots, cold migration or deploy operations due to performance limitations of secondary storage which is not optional today per design without flexibility.This paper proposes an alternative design for the problem, by making secondary storage optional component in CloudStack deployment.Goal is to leverage existing primary storage in clusters across the zone to host snapshots, templates etc. and improve speed of all associated operations.Will present all limitations posed by this design change & solutions to address limitations.
