• Share
  • Email
  • Embed
  • Like
  • Save
  • Private Content
How Server Virtualization Benefits Disaster Recovery
 

How Server Virtualization Benefits Disaster Recovery

on

  • 1,505 views

Server virtualization presents some interesting implications for disaster recovery (DR), including cost reductions and increased recovery times. In this FAQ, business continuity expert Paul Kirvan ...

Server virtualization presents some interesting implications for disaster recovery (DR), including cost reductions and increased recovery times. In this FAQ, business continuity expert Paul Kirvan discusses the various server virtualization approaches that are effective for DR and how they benefit failover and failback processes.

Statistics

Views

Total Views
1,505
Views on SlideShare
933
Embed Views
572

Actions

Likes
1
Downloads
3
Comments
0

2 Embeds 572

http://en.community.dell.com 565
http://translate.googleusercontent.com 7

Accessibility

Upload Details

Uploaded via as Adobe PDF

Usage Rights

CC Attribution-NonCommercial LicenseCC Attribution-NonCommercial License

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Processing…
Post Comment
Edit your comment

    How Server Virtualization Benefits Disaster Recovery How Server Virtualization Benefits Disaster Recovery Document Transcript

    • FAQ GuideHow server virtualization benefitsdisaster recoveryServer virtualization presents some interesting implications for disasterrecovery (DR), including cost reductions and increased recovery times.In this FAQ, business continuity expert Paul Kirvan discusses thevarious server virtualization approaches that are effective for DR andhow they benefit failover and failback processes. Sponsored By:
    • SearchDisasterRecovery.com FAQ Guide How server virtualization benefits disaster recoveryHow server virtualization benefits disaster recoveryServer virtualization presents some interesting implications for disaster recovery (DR),including cost reductions and increased recovery times. In this FAQ, business continuityexpert Paul Kirvan discusses the various server virtualization approaches that are effectivefor DR and how they benefit failover and failback processes.How does server virtualization improve recovery times?Right now, with traditional tape systems, its not uncommon for recovery to be in the areaof one to two days to completely restore a system. Although, a lot of that depends on howlarge the system is and how much data is being restored. With server virtualization, itspossible to reduce the amount of time needed to complete full restoration to four hours orless. Among the reasons that make this possible is the fact that it is not really necessary torebuild servers, applications or even operating systems separately because they existelsewhere and can be brought back online.But its important to make sure that those systems are regularly monitored to make surethat theyre in place and kept up to date. Its also a very useful way to perform disasterrecovery testing because you can run a test on the virtual image of the system withoutaffecting your production system. So there are some really compelling reasons for usingvirtualization.Can you discuss the various server virtualization approaches that are mosteffective for disaster recovery?Primarily, virtualization performed with hardware, software or a combination of both. And,of course, the idea of behind virtualization is to save money and to reduce space and powerrequirements. But again, the key issue here in terms of disaster recovery is to determinehow many servers youre going to need to back up and create a full image of all theinformation.So, this gets us into what is called the server consolidation ratio. Thats really in effect thenumber of virtual machines that a server can host. If youre looking to your inventory ofSponsored By: Page 2 of 5
    • SearchDisasterRecovery.com FAQ Guide How server virtualization benefits disaster recoveryservers and other related technologies, thats fine, but its also important to make sure thatyou dont reduce the number of servers too far because you need to be able to recover andrestore critical applications and operating systems. You want to make sure that you haveenough hardware assets to do a restoration.So, its a good idea when youre building this environment to create your virtual DR serversso that you have earmarked assets in place that can be used for a disaster and that thoseparticular servers are fully maintained and managed in the same way that your productionenvironment would be. The good news is, in a virtual environment, you can restore thingsmuch faster than if you were moving tapes or recovering servers.Are there specific approaches to determining what systems in your business needto be virtualized?From a practical standpoint, you probably want to look at those applications and operatingsystems that are most crucial to the business. Email, obviously, is one of the mostimportant applications. Microsoft Office is crucial as well, though it is not uncommon forMicrosoft Office to be implemented on individual systems. Depending on how security isarranged, those assets may also be implemented in such a way that people use the filesthat theyre working with, but go to another part of the network to actually operate theapplications.So, its important to make sure that you first identify those systems and applications thatare the most critical to the business and then focus on those in terms of the recovery effort.The principle thing to do would be to protect email and other critical applications, as well asany specialized applications that were developed in-house and can not be easily recreated.What are the major products on the market that facilitate disaster recovery in aserver virtualization environment?From a software perspective, VMware Inc. is probably the largest vendor of products andservices. ESX Server and VMware Server are both very popular.Microsoft Virtual Server is widely used as well, though not as widely used as the VMwareproducts. A lot of organizations leverage partitioning capabilities from their mainframeSponsored By: Page 3 of 5
    • SearchDisasterRecovery.com FAQ Guide How server virtualization benefits disaster recoveryenvironment into a virtualization option. Xen hypervisor, which is actually open-sourcesoftware, serves a number of different environments, including Windows, Linux and Solaris,and has built a reputation for efficiency.Another company, Neverfail Ltd., started as a U.K. organization and has expanded into theU.S. They specialize in delivering continuous availability solutions for all types ofenvironments. Their products utilize existing hardware and software. Theres a nominalextra investment thats necessary with these kinds of things and theyre able to do failoversin a matter of seconds. Failbacks also come back to an original environment just as quick.Can you talk a little more about failover and failback in a server virtualizationenvironment?By definition, failover is the capability to switch over to a redundant or standby server,system or network upon the failure or termination of an existing asset. It should normallyhappen without any kind of human intervention or warning. This contrasts with switchover,where youre dynamically making a transition from one environment to another.Failback is the process of restoring a system or another asset thats in a failover state backto its original state. The assumption there is that youre able to bring it back to the state ofoperation before the disruption.With a virtualized environment, you can failover to the environment which exists in realtime, and its very easy to failback to the original mode because you can maintain images ofyour previous environments. Whats nice about this is that it speeds up your recovery timeand its possible to do testing on an actual system without adversely affecting your actualproduction environment. You can then turn it on or off as quickly as youd like, sovirtualization really helps in the area of testing.Can you talk about disaster recovery planning in a virtualized environment interms of cost, procurement delays and increased recovery speed?Virtualization obviously has a number of very significant benefits, such as reducing thenumber of devices, reducing the equipment footprint in a data center and reducing powerSponsored By: Page 4 of 5
    • SearchDisasterRecovery.com FAQ Guide How server virtualization benefits disaster recoveryrequirements. When youre doing disaster planning, you need to make sure that yourelooking at various issues such as backing up critical data. You may be using tape, RAID ordisk technologies, but the access to a virtual environment can certainly be factored in whenyoure developing your DR plan.If nothing else, youll have excellent control over where your emergency resources arelocated. As I mentioned before, youll have the ability to do testing on a dynamic basis, soyoull always know that your resources are in place, ready to go and that the data iscurrent.Youll also be able to justify the value of having disaster recovery because as yourereducing your footprint, youre also increasing and improving your ability to recover in anykind of emergency. So, while youre saving money, you can also be improving your ability torecover and you should be able to make the case that disaster recovery, in conjunction witha virtualized environment, could probably go a long way in proving the ROI of yourvirtualization strategy.Sponsored By: Page 5 of 5