Multi-Tenancy,O/S Virtualization and Cloud - What is the Right way??
By Girish Venkat on Oct 09, 2010
I am a member of the Trusted Computing's Multi-Tenancy Working group where we are dealing with one of the biggest promises of cloud - how do I have multi-tenancy and still have security controls in place is to be able to host multiple customers in a shared infrastructure. .
What industry is doing today is to avoid the issue of multi-tenancy all-together, by focussing only on hypervisor based virtualization. IMO, hypvervisor based virtualization is not real cloud - even though it does it bring benefits that are somewhat cloud like. Most of the hypvervisor based virtualization usually drives soft-lifting the siloed implementations. While this brings consolidation into play - this really is only a part of the promise of cloud. What cloud computing really provides is the ability to leverage scale that goes beyond the O/S virtualized boundaries. The key question then really becomes this - when do we need to STOP doing hypervisor based virtualization and start looking at various other types of virtualization that will allow us to have secure boundaries ( isolation) and yet provide the cloud like scale that we want to get.
I will try to answer this key question as I go through the next few postings.