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Bulletproof Disaster Recovery Plans |
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Virtualization Can Bulletproof Disaster Recovery Plans |
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When it comes to disasters, companies have two choices: Be prepared, or be prepared to fail. Unfortunately, disasters are not a matter of if. They're a matter of when. Many
people think of major disasters that hit the national news, but there are other types of events that can result in a Total Building Loss (TBL) disaster such as fires, floods,
tornadoes and robberies. According to a study by McGladrey and Pullen, every year, one out of 500 data centers will experience a severe disaster. That same study reveals
that a full 43 percent of companies who experience a significant disaster never re-open, and 29 percent close within two years. Unless companies have a solid disaster
recovery (DR) plan, they are at risk.
Over the past several years, virtualization has emerged as an easy and reliable way to improve disaster preparedness. This technology provides companies the ability to dramatically increase the efficiency and availability of their resources in the event of a disaster. Using virtualization, enterprises can ensure they are back online within minutes or hours, rather than days, weeks or months. |
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Where Traditional DR Plans Fail |
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| In our experience, nine out of 10 companies -- from small businesses to multi-billion-dollar corporations -- are not prepared to recover from a fire, flood or other major disasters. Their DR plans are either weak or non-existent. |
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Here are some of the most common problems we find with traditional DR plans: |
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| -› Many are half baked. Some DR plans are sitting in "draft one," meaning they are incomplete, inaccurate and outdated. This can occur when companies take the "big binder" approach. They assemble a large document outlining a DR plan. But if they don't complete it or update it as their IT environment changes, it's invalid. For example, some companies often create a DR plan because an audit is coming down the pike. Since they are usually short on time or resources, they tap whoever is available, including lower level personnel or interns, to create the plan. That can be a big mistake. Without a seasoned and experienced team dedicating the appropriate amount of time to developing and testing the plan, the result can often be a half-baked strategy that is useless in a real disaster. |
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| -› The plan is untested. An untested DR plan is equivalent to not having one at all. Numerous barriers can prevent companies from creating test plans. First, some companies don't even realize they need a test plan. However, testing is crucial for ensuring DR plans will truly work. Or, too many people are involved in the decision-making process and the team cannot reach an agreement on the plan's contents. Sometimes we are told that an IT leader has much of the plan "in his head," which is an obvious, significant risk for the company. DR plan testing is a requirement, not an option. |
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| -› Recovery tools do not always work as expected. Certain recovery methods or tools can also be faulty. For instance, backup jobs might not be capturing every file. This can occur if the backup configuration is outdated. Say it's set to capture 200 directories on a server, but 100 more folders have been created since the backup job was originally created and configured. Obviously, those 100 folders would not be captured if the backup is not updated appropriately. Sometimes backup tapes have deteriorated from age and overuse. This prevents companies from restoring the data that resides on those tapes. Or, perhaps the discs and license keys for the backup and restore software are saved on or near the server. So when the data center collapses, companies cannot access the software or its installation keys to install the recovery software in order to restore the data. |
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| -› Not all outsource partners are prepared. While many DR partners provide adequate recovery services, some DR partners may not be prepared for real disasters. They can be slow to respond, and lack the technical wherewithal to recover systems and data for multiple clients simultaneously. We have seen this many times. Or, organizations sometimes assume their hosting provider has everything covered. Just because they are a big name or have a big data center does not mean that this is always the case. We have seen many cases where hosting providers are unable to test a DR plan for client environments. Unfortunately, some companies find this out the hard way, after disaster strikes. In the end, you are responsible for your firm's recovery, whether you manage it yourself or engage a partner company. |
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| -› Recovery and production environments are incompatible. With traditional physical IT environments' DR plans, recovery environments must often match the production environments identically. Most hardware and software components must have the same general model, configurations, etc. Again, when a component of the production environment is changed or updated, it must also be updated in the recovery environment. This can become a costly, laborious and time-consuming resource drain. Certain applications can also have unique DR requirements. For example, multi-tiered, multi-site Web transaction systems might require a Microsoft (Nasdaq: MSFT) BizTalk expert or maybe a WAN architect. Complex apps cannot always be taken as part of a broad-brush DR plan. In this case, the company's DR plan might have to enlist the expertise and active involvement of several IT professionals who are trained in application-specific architecture and must involve the same people during tests and actual disaster events. Wouldn't it be better to have a way to avoid continual dependence on such a large group of people? |
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Virtualization Offers Solutions |
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| Companies are increasingly abandoning their old DR platforms, and turning to virtualization technology to prepare their business for disaster and safeguard their assets. |
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| The technology fundamentally changes the way back-end system resources are accessed and utilized. With regard to DR, a virtualized environment lets companies rapidly take snapshots of their servers, desktops and other components and store them on a storage area network (SAN) or other storage media. These snapshots are part of the virtual environment, which can then be restored to another data center location that has been equipped with virtualization technology. In some cases, environments can be replicated so that no restore is necessary. Multiple virtual environments can be used simultaneously on a single physical server. Multiple physical servers can be combined to form a "resource pool" and be treated as one platform to host virtual environments. Each environment runs its own operating system and applications, independent of the others. This is possible due to a virtual layer known as a "hypervisor," which allocates hardware resources dynamically and transparently. |
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| Virtualization can help companies establish a highly reliable DR plan to greatly mitigate the impact of a disaster in several ways: |
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| -› Break the hardware dependency. Virtualization allows companies to transform physical servers into virtual machines, which reduces dependency on multiple physical resources. There's no need for one-to-one hardware duplication because the hypervisor handles all communication between the virtual machines and the resource pool hardware. As such, the physical setup in production can be different than at the recovery site. Additionally, as companies upgrade their physical servers, legacy servers can be used to host recovery systems. This saves the cost of new recovery hardware. |
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| -› Increase server portability. Virtual servers are much more portable than physical ones because they essentially become a set of files that companies can copy to tape, DVD, etc. and restore like any other file. In the event of a disaster, files can be loaded onto any server running a compatible hypervisor. From that point, with the appropriate network changes, the protected systems could be up and running within hours, instead of days or weeks. Companies can also easily take the files to an outsource partner for testing. |
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| -› Nearly eliminate planned down time. Planned down time, including hardware maintenance, software updates, etc., typically constitutes 80 to 90 percent of all down time. Virtualization allows companies to significantly reduce or eliminate this downtime. Virtual environments can be dynamically and rapidly moved to different physical servers within a resource pool without interrupting the business. While maintenance is performed on one physical server, employees can continue to work on their virtual servers that are running elsewhere in the resource pool, thereby eliminating downtime for the maintenance. |
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| -› Test rapidly and keep it current. Virtualization allows companies to take snapshots of their production environments and store them on a storage area network (SAN) or other device/media. DR plan testing can then be done on these snapshots, which eliminates the laborious build, install and restore process typically required for traditional DR testing. This reduces several aspects of the testing process, including its complexity, the number of specialized staff required, propensity for human error, and cost. By using recent snapshots of the production servers, companies can be assured that they are testing the most current system configurations as opposed to maintaining recovery site configurations, configuration manuals, etc. |
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