In 70-412 Failover Services video at 57 min Don mentioned that Clustering was a dying technology and I was wondering how so? Is it because of virutalization?
Is clustering a dying technology?
Traditional clustering is indeed dying. What is happening, is that applications need to scale much larger today than ever before. Websites like Twitter and Facebook could never hope to exist if they relied on the traditional model of a server cluster. So instead, the developers of applications like these have begun building in redundancy/scale right in to the application itself. For example, if you run the Microsoft Exchange, you no longer need clustering with it because it supports replicating the mailbox databases between multiple servers without a cluster. Same goes for Active Directory domain controllers. Moving away from traditional clustering allows us to have "multi-master" environments where no one node is responsible for a service. The only place I see clustering sticking around for a while is in the case of virtualization infrastructure like VMware ESXi and Microsoft Hyper-V. However, we may see that change too before long.
Hope that helps and thanks for watching,