“With hundreds of terabytes in the cloud — you are no longer portable and you’re not going to be portable, so get over it,”*
This thought grabbed my attention… the idea that when you store a lot of data within a ‘cloud’, I mean terabytes… that you’re then stuck in that cloud and can not migrate, port or replicate to a another cloud provider (regardless of whether they provide private or public clouds), you can’t even revert to your own private cloud! In some ways I concur with this – if you’re running within a cloud you’re just buying virtual machines and the storage presentation to the virtual machine is so intertwined that it’s hard to unravel…
So this is where I think a private cloud offering gives you the assurance that you’re still able to migrate, port or replicate from your own data centre into the cloud and vice versa back out of the cloud. The technology itself is very important, your provider needs to pick the right mix of technology so that you always have the option to migrate or move away from that specific provider if you decide to move your data elsewhere…
Anyway back to the data… so lets take an example of how you can migrate in and migrate out utilising migration technology through replication… if the ‘store’ service in a private cloud platform utilises multi-vendor virtualisation technology it can support a larger quantity of vendors arrays. This means multiple arrays from multiple vendors can be supported through a multi protocol fabric.
An example of how this could work for a customer migrating to the cloud would be the following… btw this is in the roadmap for 2010 (POC has already been completed with some great results!!)
It’s possible to deploy ‘virtualisation appliances’ into a customer’s data centre, enabling the customer to have a virtual storage platform and giving them a ‘single view’ of their storage. The customer will have to accept some change(s) but will not have to make their current IT investment redundant thus prolonging the life of their current storage assets – providing ROI and TCO in a single proposition for their management! Once virtualised, it’s possible to replicate the data into a storage cloud. (This is already up and running in our cloud today!)
This strategy provides a stepped approach for migration to cloud services, the first step is ‘cloud recovery’, then you begin to migrate production services as and when the business has seen the benefits and trusts the ‘cloud’ to run it’s mission critical applications!
So already you can see some benefits – when you want to move out of the cloud you reverse the process… see cloud can be portable!