Hosting goes virtual
We operate in a business world that knows no borders or time zones and we continue to find new ways to redefine the possible. Buyers and sellers anywhere in the world can connect at the click of a mouse. Users have been unshackled from their desks and offices, and can run a business from the beach or the city through a growing variety of devices. A whole generation is coming of age where constant connectivity to the global village is deemed completely normal. And technology has led the charge to make this possible. One technology in particular is allowing us to connect the dots in a spectacular fashion. That technology is virtualisation. Defined as the creation of a virtual (rather than actual) version of something, we can virtualise hardware platforms, storage, network resources and even desktops.The link between the computing resources needed to run business, and the physical platforms on which they sit, is no more. Multiple "virtual” servers can reside on a single hardware server. Each can be provisioned and managed in the same way as their physical forbearers, and this factor alone delivers one of the most compelling benefits of virtualisation: consolidation. Consider a business environment with ten servers. Ten servers can generate significant amounts of heat. Ten servers can draw a considerable amount of power. Ten servers have more parts to fail. What if those ten servers could sit on a single physical box? They can, in a virtualised world. With virtualisation comes a new way of doing business. Economies of scale mean that large infrastructures shared by many virtual machines make sense. Large infrastructures beg for automation as a means to control and manage resources.Automation invites self-service and the notion of "on-demand” computing where resources can ebb and flow over units of time as small as a minute, and where the storage devices will move data seamlessly across disk classes as performance dictates. Suddenly, it no longer matters what your system is running on. The focus is where it should be: on the performance and availability of your business systems. Against a backdrop of virtualisation, the Cloud is the new paradigm for IT systems. But with this advance comes some real-world decisions for a business. It is the business that needs to understand the implications, benefits and the value proposition of virtualisation rather than leaving it to the CIO or IT department. ConsiderationsIf your business runs a traditional IT infrastructure, then consider what the Cloud has to offer. But before you do, take stock of where you sit in relation to cloud computing.
- What exists now and why? Has your growth in IT infrastructure been planned and managed or has it evolved, driven by different platform needs over time?
- What is in place for business continuity? Can you carry on in case of human error, data loss or physical damage from fire or extreme weather events?
- Is your infrastructure meeting the needs of the business in terms of capacity and performance?
- Are you constrained by your network infrastructure?
- What risks are you carrying in the current infrastructure? Security, resilience…?
- What resources are needed to maintain the servers, the network and your connectivity to the outside world?
- Opt for virtualisation in the cloud - shared or private
- Opt for physical resources - outsourced or on-premise
- Virtualised servers
- Virtualised software applications
- Virtualised storage
- Virtualised firewalls
- Virtualised networks
- Virtualised desktops
- Rental licences for operating systems, databases and application software
- And the services to manage and maintain your resources: backups, server patching, firewall management, upgrades, to name but a few.
- Hosting is moving into a commodity space. The differentiator will be the service levels. Check these and satisfy yourself that these are real. Ask for references or refer to blog sites to see what the industry has to say.
- Make sure your provider has an open approach towards outages. Planned or unplanned, they still happen in the hosting world and transparency is critical for you to manage the impacts. Visibility of network outages is a reasonable indicator of your service provider’s level of openness.
- Make sure you stay mobile and can move to another provider if you are unhappy.
- Be prepared to trade a term commitment for a discount once you are happy with your hosting partner. This will buy significant long term discounts.
- Make sure you address the key issues in the cloud and how these are handled by your service provider:
- Security and where the responsibility sits
- Data ownership (sovereignty); only really an issue if you are hosting off shore.
- Resilience in the data center, the network and platform infrastructure.
- Understand where the demarcation points are for service and who does what
- Understand the service levels on offer and particularly the level of self-service available to you.
- Understand the reporting and monitoring available for exception handling and options for proactive management of anything affecting your hosting environment: SMS texts, twitter alerts and email.
- Understand the range of additional services available to you as optional extras should you wish to migrate fully into the cloud.