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Cloud Computing: Creating a Generic (Internal) Cloud Architecture

Do Cloud-like architectures have to remain external to the enterprise? No.

Kenneth Oestriech's Blog

I've been taken aback lately by the tacit assumption that cloud-like (IaaS and PaaS) services have to be provided by folks like Amazon, Terremark and others. It's as if these providers do some black magic that enterprises can't touch or replicate. However, history has taught the IT industry that what starts in the external domain eventually makes its way into the enterprise, and vice-versa.

I've been taken aback lately by the tacit assumption that cloud-like (IaaS and PaaS) services have to be provided by folks like Amazon, Terremark and others. It's as if these providers do some black magic that enterprises can't touch or replicate.

However, history's taught the IT industry that what starts in the external domain eventually makes its way into the enterprise, and vice-versa. Consider Google beginning with internet search, and later offering an enterprise search appliance. Then, there's the reverse: An application, say a CRM system, leaves the enterprise to be hosted externally as SaaS, such as SalesForce.com. But even in this case, the first example then recurs -- as SalesForce.com begins providing internal Salesforce.com appliances back to its large enterprise customers!

I am simply trying to challenge the belief that cloud-like architectures have to remain external to the enterprise. They don't. I believe it's inevitable that they will soon find their way into the enterprise, and become a revolutionary paradigm of how *internal* IT infrastructure is operated and managed.

With each IT management conversation I've had, the concept that I recently put forward is becoming clearer and more inevitable. That an "internal cloud" (call it a cloud architecture or utility computing) will penetrate enterprise datacenters.

Limitations of "external" cloud computing architectures

Already, a number of authorities have pretty clearly outlined the pros and cons of using external service providers as "cloud" providers. For reference, there is the excellent "10 reasons enterprises aren't ready to trust the cloud" by Stacey Higginbotham of GigaOM, as well as a piece by Mike Walker of MSDN regarding "Challenges of moving to the cloud”. So it stands that innovation will work around these limitations, borrowing from the positive aspects of external service providers, omitting the negatives, and offering the result to IT Ops.

Is an "internal" cloud architecture possible and repeatable?

So here is my main thesis: that there are software IT management products available today (and more to come) that will operate *existing* infrastructure in a manner identical to the operation of IaaS and PaaS. Let me say that again -- you don't have to outsource to an "external" cloud provider as long as you already own legacy infrastructure that can be re-purposed for this new architecture.

This statement -- and associated enabling software technologies -- is beginning to spell the beginning of the final commoditization of compute hardware. (BTW, I find it amazing that some vendors continue to tout that their hardware is optimized for cloud computing. That is a real oxymoron)

As time passes, cloud-computing infrastructures (ok, Utility Computing architectures if you must) coupled with the trend toward architecture standardization, will continue to push the importance of specialized HW out of the picture. Hardware margins will continue to be squeezed. (BTW, you can read about the "cheap revolution" in Forbes, featuring our CEO Bill Coleman).

As the VINF blog also observed, regarding cloud-based architectures:

You can build your own cloud, and be choosy about what you give to others. Building your own cloud makes a lot of sense, it’s not always cheap but its the kind of thing you can scale up (or down..) with a bit of up-front investment, in this article I’ll look at some of the practical; and more infrastructure focused ways in which you can do so.

Your “cloud platform” is essentially an internal shared services system where you can actually and practically implement a “platform” team that operates and capacity plans for the cloud platform; they manage its availability and maintenance day-day and expansion/contraction.
Even back in February, Mike Nygard observed reasons and benefits for this trend:
Why should a company build its own cloud, instead of going to one of the providers?

On the positive side, an IT manager running a cloud can finally do real chargebacks to the business units that drive demand. Some do today, but on a larger-grained level... whole servers. With a private cloud, the IT manager could charge by the compute-hour, or by the megabit of bandwidth. He could charge for storage by the gigabyte, and with tiered rates for different availability/continuity guarantees. Even better, he could allow the business units to do the kind of self-service that I can do today with a credit card and The Planet. (OK, The Planet isn't a cloud provider, but I bet they're thinking about it. Plus, I like them.)
We are seeing the beginning of an inflection point in the way IT is managed, brought on by (1) the interest (though not yet adoption) of cloud architectures, (2) the increasing willingness to accept shared IT assets (thanks to VMware and others), and (3) the budding availability of software that allows “cloud-like” operation of existing infrastructure, but in a whole new way.

How might these "internal clouds" first be used?

Let's be real: there are precious few green-field opportunities where enterprises will simply decide to change their entire IT architecture and operations into this "internal cloud" -- i.e. implement a Utility Computing model out-of-the-gate. But there are some interesting starting points that are beginning to emerge:

  • Creating a single-service utility: by this mean that an entire service tier (such as a web farm, application server farm, etc.) moves to being managed in a "cloud" infrastructure, where resources ebb-and-flow as needed by user demand.
  • Power-managing servers: using utility computing IT management automation to control power states of machines that are temporarily idle, but NOT actually dynamically provisioning software onto servers. Firms are getting used to the idea of using policy-governed control to save on IT power consumption as they get comfortable with utility-computing principles. They can then selectively activate the dynamic provisioning features as they see fit.
  • Using utility computing management/automation to govern virtualized environments: it's clear that once firms virtualize/consolidate, they later realize that there are more objects to manage (virtual sprawl) , rather than fewer; plus, they've created "virtual silos", distinct from the non-virtualized infrastructure they own. Firms will migrate toward an automated management approach to virtualization where -- on the fly -- applications are virtualized, hosts are created, apps are deployed/scaled, failed hosts are automatically re-created, etc. etc. Essentially a services cloud.

It is inevitable that the simplicity, economics, and scalability of externally-provided "clouds" will make their way into the enterprise. The question isn't if, but when.

More Stories By Kenneth Oestreich

Ken Oestreich is VP of Product Marketing with Egenera, and has spent over 20 years developing and introducing new products into new markets. Recently, he’s been involved in bringing utility- and cloud-computing technologies to market. Previously, Ken was with Cassatt, and held a number of developer, alliance and strategy positions with Sun Microsystems.

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Most Recent Comments
sajai krishnan 08/26/08 09:53:44 PM EDT

Ken
Very much on topic. In our parallel area around cloud storage we see interest in internal/private storage clouds as much as with external/public storage clouds. Bandwidth, security are clearly reasons to go with a private cloud, whereas getting offsite copies is certainly one reason to consider a public cloud. There is the additional reason that by building your own storage cloud you can tune the performance characteristics of your cloud by having, for example, beefy, hi-performing nodes for streaming or inexpensive nodes with a lot of disks for archival applications.

As for service providers - I think we will see service providers delivering the typical public service like S3, but could also provide "insourcing" services ... i.e. a service provider managing an dedicated internal cloud for Fortune100 data center in a colo model. I think AT&T's recent Synaptic Hosting is probably headed in that direction.

There are a few different ways to skin this cat in terms of implementation. The key is that the technology matures, and customers get familiar with the commodity scale-out economics, and easy management model that is at the core of this approach.

Regards,
Sajai Krishnan, CEO ParaScale

amuletc 08/25/08 08:14:58 PM EDT

By Dan D. Gutierrez
CEO of HostedDatabase.com

I really like your concept of an "internal cloud"! When my firm launched the web's first Database-as-a-Service offering in 1999, we had a sales option to create a special instance of our product for an enterprise that wanted the convenience of SaaS, but was concerned about privacy and security issues. Bringing in our service as an internal cloud solved these issues. Fast forward nearly 10 years, it is great to see this concept mentioned in this timely article.

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