Wednesday, September 14, 2011

How Virtualization Changes Your Disaster Recovery

By Dan Lamorena

The adoption of cloud computing and virtualization is increasing quickly. According to Symantec’s “Enterprise IT Journey to the Cloud” survey, more than 75 percent of enterprises are at least discussing virtualization, and a significant number have already implemented some form of visualization in their infrastructure. But the adoption of these new technologies raises concerns regarding the reliability of data and applications accessed through the cloud. In particular, organizations are concerned about high availability and disaster recovery.

According to Symantec’s 2010 Disaster Recovery Survey, 85 percent of enterprises have revaluated their disaster recovery plan following server virtualization. This may seem like a monumental task, especially with DR budgets expected to shrink in the coming year. But with a single hour of Web server downtime costing a large enterprise more than $62,000 (approximately N9, 300,000.00), it’s easy to see how critical uptime is – not only for revenue and employee productivity, but also for less easily measured metrics such as brand reputation.

System upgrade alone caused nearly 51 hours of downtime on average over the past 12 months, according to IT professionals responding to the survey. When something as routine as regular upgrades can cause so much downtime, it is vital for organizations to implement failover capabilities to minimize risks. These solutions should be able to seamlessly recover applications by moving them to a function server, with minimal downtime.

Data Backup

Data backup is an integral part of a successful disaster recovery plan. According to the Disaster Recovery Survey, 56 percent of virtualized data is currently backed up, with only 20 percent of data being protected by replication in particular is one area of data replication in particular is one area which often suffers as organizations look to reduce expenses. One data manager said, “Here, we lack replication. It was something that we were going to implement, and due to company changes, our replication plan fell by wayside.” Survey respondents reported that the largest challenges in backing up virtual systems in resource constraints.

Protecting Mission-Critical Applications

Another critical aspect of a successful disaster recovery plan is the protection of mission-critical applications in a virtualized environment. While half of organizations have begun to use the cloud for mission-critical applications, management is often hesitant to put applications into the cloud because of perceived security risks and lack of control. The largest challenge cited by IT professionals in protecting mission-critical applications in a virtual environment, followed closely by lack of scalability. Vendor need to develop solutions that address these concerns in other for virtualization to reach its full potential.

Network Monitoring and Automated Recovery

Organizations can avoid many outage problems through proactive monitoring of applications and IT services, to identify problems before they escalate. An ideal DR solution will allow you to monitor applications and their components, including the virtual machine, network component, storage components and the physical server.

Currently, 26 percent of an IT department’s budget is designated for disaster recovery initiatives, such as clustering, spare server and data replication. But 43 percent of organizations are reporting that disaster recovery budgets are shrinking within the next 12 months. With IT departments perpetually overworked, automated processes are ideal for improving your recovery time with minimal staffing resources. When outages inevitably open, having an automated recovery solution will enable you to restart applications and reconnect users without the need for staff intervention.


One of the most important things IT can do to evaluate preparedness is to perform regular disaster recovery tests. Fifty-one percent of enterprises carry out full scenario testing of its DR plan every six months, with 31 percent testing them more often. Performing these regular assessments will give you an idea of where you need to make improvements. The best way to perform assessments without compromising services is by implementing non-disruptive testing tools.


The adoption of cloud computing and virtualization technologies can offer increased flexibility to your IT service through on-demand provisioning and lower operational expenses. But in order to reap the benefits, enterprises need to address challenges inherent in the technology by revising their DR plans. An effective plan needs to include backup and protection of sensitive data, proactive network monitoring and automated recovery, and testing in order to mitigate availability issues and ensure maximum up time.

Dan Lamorena is director of product marketing, Symantec’s Storage and Availability Management Group.


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