The complexity of traditional recovery solutions compounds an already difficult situation and heightens the opportunity for human error. Speed and quality of recovery are extremely important when customers and employees are relying on access to critical data, but the average restoration takes hours at best.
With solutions like tape backup, even a successful recovery results in the loss of any data that has changed since the backup was made.
Learn how to simplify the restoration process and reduce the time and effort involved with server recovery.
www.doubletake.com+44(0)1905 745711LIVEWIRE": FULL-SERVER PROTECTIONAND RECOVERY IN REAL-TIMEAbstractThe complexity of traditional recovery solutions compounds an already difficult situation andheightens the opportunity for human error. Speed and quality of recovery are extremelyimportant when customers and employees are relying on access to critical data, but theaverage restoration takes hours at best. With solutions like tape backup, even a successfulrecovery results in the loss of any data that has changed since the backup was made.Livewire"from Double-Take Software provides whole-server data protection that simplifiesthe restoration process and reduces the time and effort involved with server recovery. BUSINESS VALUE WHITEPAPERDouble-Take Software, SAS Published: September 2008Untitled DocumentWHITE PAPER: LIVEWIRE: FULL-SERVER PROTECTION AND RECOVERY IN REAL-TIMEThe Trouble with TapeIf you ve ever recovered a production server using traditional backup solutions such as tape, you know that the complexity of traditionalrecovery solutions compounds an already difficult situation and heightens the opportunity for human error. Speed and quality of recoveryare extremely important when customers and employees are relying on access to critical data, but the average restoration takes hours atbest. And, with solutions like tape backup, even a successful recovery results in the loss of any data that is new or has changed since thebackup was made. The problems with tape backup are well known; companies have been dealing with them for decades. For starters, tape backup requiresa significant investment. Tape hardware and backup software are expensive, as is the labour required to set up and maintain them. Tapecartridges are a continuing cost and completing daily tape backups requires heavy administrative intervention. 1If you have multiplebranch or remote offices (a recent census bureau survey indicates the average company has 50 locations) you have to set up tapeequipment and allocate administrative supervision for each. The only other option in these situations is to forego protecting data inbranch office locations which becomes a problem all of its own.Even once the equipment is in place, making backups is inconvenient bordering on impractical. Tape backup can involve downtime,known as backup windows, since the system being backed up cannot be used during the process Given the ever-increasing demand foraround the clock data access, it gets harder and harder for companies to complete nightly backups within the time window provided. Inmany cases, it is so hard that the once-nightly backup goal often slips to every other night for many machines. Foregone backups areeven a common problem in remote branch offices where backing up is left to non-IT staff. The Cost of Lost DataMost companies don t understand how vulnerable their data and business remain to disaster even after they ve made a huge up-frontand ongoing investment in tape-based disaster recovery. An article in SearchSecurity reports that in a survey of 500 IT departments, asmany as 20% of routine nightly backups fail to capture all data. Among participants of another survey cited in this article, 40% of ITmanagers were unable to recover data from a tape when they needed it.2This is a significant concern for corporations that areregulated by industry or government requirements as they can face the risk of being out of compliance if they cannot produce requireddata when they need it. Tape backup also places limits on your recovery point objective (RPO), the point in time to which you can recover your systems shoulddisaster strike. Periodic tape backup guarantees hours of lost data in the event of a disaster. Suppose, for example, that a critical systemfails anytime today; the best you can do is recover to yesterday s data, which will be at least twelve hours old. The later in the daydisaster strikes, the older the data from which you ll recover. In addition, recovering from a disaster, any data not backed up is lost forgood unless you recreate itThe cost of permanently lost data is high and includes the cost of the revenue that the data represents, the business value you canextract from it, and the cost to recreate it. Consider: " How much money would your company lose if you lost all your transaction data for the last twelve hours, or even the last tenminutes?" What is the value of the knowledge contained in your company s last twelve hours worth of e-mails and e-mail attachments? Whatwould it cost to have your engineers recreate the last twelve hours worth of original or edited CAD/CAM drawings?" What s your exposure if you can t produce this data in compliance with Sarbanes-Oxley, HIPPA, SEC and other regulations?In The Cost of Lost Data, a Pepperdine University report updated in 2003 - before the advent of Sarbanes-Oxley - Dr. David Smithestimates the average cost of irrecoverably lost data at more than 6,000 per megabyte lost.3But if the data lost is business transactiondata or data that s especially expensive to reproduce and key to your company s regulatory compliance, your costs could be much, muchhigher.21 See Double-Take whitepaper Reducing Costs and Risks of Branch Office Data Protection 2Regan, Keith. Concerns Raised on Tape Backup Methods. SearchSecurity.com 15 April 20043Smith, David M. The Cost of Lost Data. Graziadio Business Report Vol. 6 No. 3Untitled DocumentWHITE PAPER: LIVEWIRE: FULL-SERVER PROTECTION AND RECOVERY IN REAL-TIMEThe Cost of DowntimeWhen a large-scale disaster strikes, with tape backup you re out of business until you can restore your systems and your data from yourtapes. This kind of restoration takes a minimum of several hours, and can easily take days or even weeks.Gartner Group estimates that the average cost of network downtime for larger corporations is 24,000 per hour; Contingency PlanningResearch pegs the average hourly downtime costs for small businesses at roughly 10,000. But the cost of downtime can be significantlyhigher depending on the business. In fact, it can be in the hundreds of thousands per hour for health care, consumer products andbanking businesses, and in the millions per hour for brokerage, energy, manufacturing and telecommunications companies.4The key to a successful disaster recovery plan is to focus not just on the data (RPO) but also on the applications that end users run togain access to that data. Recovery Time Objective (RTO) is generally defined as the amount of time it takes to regain access to business-critical data. Solutions like tape backup, which have an RTO of hours or days, don t provide the level of recoverability that mostcompanies require.A Better Solution: Data Replication with System StateProtection Half of the Protection Battle: RPO Data replication has long been considered an impractical solution to the data protection problem. Historically, it required expensivehardware and large investments in bandwidth to protect data in real-time. The evolution of software-based, asynchronous replicationhas dispelled this long-held belief that continuous data replication isn t feasible especially for small or medium-sized business withlimited resources. And this new breed of data replication offers benefits that more traditional solutions such as tape-based periodic backup cannot:" Data replication provides a continuously updated copy of critical data at a remote site which minimises data loss should a recoverybe necessary." Disk-based recovery is more reliable, less complex and takes less time, improving the RTO of the disaster recovery solution.Even within the realm of software-based data replication, there are opposing approaches: synchronous and asynchronous replication. It simportant to understand the benefits and drawbacks of each.In synchronous replication, the replication software intercepts data being written to disk and sends it to both the primary and secondarydisk arrays at the same time. Only when both arrays confirm receipt of the data does the software accept another write. Asynchronousreplication can deliver recovery point objectives (RPOs) measured in minutes, and recovery times measured in seconds. With synchronous replication, data loss approaches zero because both the primary and secondary disk arrays must contain the samedata. But the confirmations required for each data write can cause performance problems, especially in applications that process lots oftransactions. Acceptable performance often requires connecting the arrays with high-bandwidth fibre channel, which is very expensiveand which has an effective range of about ten miles. As a result, synchronous replication is not ideal for remote disaster recovery, and ismost often used to create a local backup of data in situations where having an exact copy of the data is essential. In asynchronous replication, the replication software grabs data once it is written to disk, and rewrites it to a second array. Inasynchronous replication, the application doesn t have to wait for any confirmations and can continue to operate. As a result, it has littleor no impact on application performance, and can work effectively and economically over low bandwidth connections and long distances.While it can t deliver the zero data loss available through synchronous replication, it can be configured to deliver RPOs measured inminutes, and recovery times measured in seconds, both of which are more than acceptable for most businesses. This combination ofexcellent data protection, minimal performance impact, long-distance effectiveness and low-cost deployment makes asynchronousreplication an ideal solution for backing up data to a remote recovery site.34 Meta Group 2000 dataUntitled DocumentWHITE PAPER: LIVEWIRE: FULL-SERVER PROTECTION AND RECOVERY IN REAL-TIME The Other Half of the Protection Battle: RTO Data replication solutions have traditionally been limited to protecting critical data and not the applications associated with that data orthe systems on which it resides. When a Windows server fails, however, simply having access to a copy of the data is not enough. It sthe application and the underlying operating system it runs on that provide customers and end users access to the data. This information the operating system files, registry information, application binaries, settings and other system-related information - is collectivelyreferred to a server s system state . Left unprotected, recovery of these components can take hours or days to accomplish. In fact, inmany cases, the recovery point of the system may not match the system state prior to the failure, requiring system, applications, servicepacks, settings, drivers, hot fixes, etc., to be re-installed or recovered. Without a way to easily recover the data and system stateinformation, companies risk not being able to meet their Recovery Time Objectives (RTOs). While Microsoft Windows and leading backup applications provide adegree of protection against failures by allowing users to back upcritical system state information to tape media, it is on a scheduled,versus real-time basis. This means there is good likelihood of systemstate information loss since system changes are likely to occurbetween tape backups. Also, this type of approach often requiresrecovery to similar server hardware -something many organisationsmay not have on-hand in the event of a major disaster. Double-Take Livewire addresses this recovery gap, providing real-time replication and hardware-independent recovery of systemstate information. Livewire delivers real-time head-to-toe protectionof system, application and data, plus, recovery can be done to aphysical server or, more importantly, virtual environments like VMware ESX Server or Microsoft Virtual Server 2005. Double-Take Livewire and Double-Take Livewire OptionLivewire is a whole-server data protection solution that simplifies the restoration process and reduces the time and effort involved with serverrecovery. The entire production server its operating system, applications and data can be protected and easily recovered to a new systemquickly. Livewire provides a single solution to continuously protect and recover an entire server. Livewire presents the task of server recovery as aseries of easy-to-understand steps. Because Livewire replication protects the entire production server its operating system, applications anddata, restoring the server encompasses as few steps as possible and provides a significantly better recovery time than existing solutions such astape backup.Livewire is available as a standalone product or as an option for Double-Take. Built on Proven Double-Take Technology Livewire is built on Double-Take and its replication technology, the world s most relied-upon solution for accessible and affordable data protectionsolutions for disaster recovery and centralised backup. Livewire uses patented replication and failover technology that continuously captures byte-level changes as they happen and replicates those changes to one or more secondary servers at any location - locally or at a recovery sitemiles away.Livewire from Double-Take Software integrates with the Windows kernel I/O sub-system which provides a serialised view of all I/O operationsbefore they are passed to the file system layer. This is a standard integration point where applications such as anti-virus and open file agentsintegrate and provides a fully consistent transactional view of all system writes. It monitors the system I/O and replicates the write activity for user-defined volumes, directories or files. I/O operations that are exposed at this layer reflect the actual byte-level changes by the applications while theyare writing to the files, so Livewire replication does not require the database to be taken off-line or placed in a quiescent state before determiningwhich changes have taken place. 4Untitled DocumentWHITE PAPER: LIVEWIRE: FULL-SERVER PROTECTION AND RECOVERY IN REAL-TIMELivewire replication technology reduces the window for data loss, is more efficientthan tape, and less costly than tape or other replications solutions. BecauseLivewire replicates data in near real-time, an up-to-the-second copy of data isalways available on the backup server. Livewire also uses unique compression andbandwidth throttling features that allow an administrator to control the amountand timing of bandwidth used for backup. It can utilise existing infrastructure andis hardware agnostic; there s no large investment or hidden costs standingbetween you and better backups. The foundation of Livewire protection is Double-Take, the most relied-upon solution for real-time replication of critical data andautomated failover for application availability. Livewire is Microsoft Windows 2000 and 2003 certified at all levels, one of the few replication products to haveachieved this level of certification. It delivers protection that is better orcomparable to many hardware based solutions, but costs tens of thousands less." Real-Time Protection - Replicates continuously at the byte level over any shared or private IP network, ensuring that changed data isprotected and can be quickly restored at all times " Application Agnostic - Works with existing hardware to protect applications such as Microsoft Exchange, Microsoft SQL Server, andSharePoint any application that runs on Windows Server." Easily Installed and Maintained - Allows companies of any size looking for data protection solutions to install and maintain Double-Take." Cost Effective - Provides strong data protection at low cost with an accelerated return on investment - paying for itself usually withinmonths.Easy Implementation and ManagementLivewire features a management console that provides an easy-to-follow wizard for creating a connection that protects the entire server.Once installed, Livewire performs an initial mirror of the server, including data, applications and operating system. When the mirror iscomplete, Livewire begins replicating changes made, at the byte level, to the operating system, data and applications. This replication ofsystem state ensures that the entire server can be recovered in the event of a disaster or data loss.In some cases, not every volume on a server needs protected. Livewire provides the option to exclude one or more data volumes at eitherprotection or recovery time based on an organization s specific requirements.Single-Step Recovery with Livewire The Livewire Console allows you to quickly and easily configure and perform recovery, including validation steps that ensure recoverygoes as planned. When a system volume or entire server fails recovery of both system state and data can be performed from the LivewireConsole, reducing the number of steps needed to recover a server to its original state. The console also eliminates many of the stepsrequired by traditional backup and restore solutions by requiring only a standard Windows OS on the new system.Livewire provides an easy method for restoring an entire server, including the system state (the server s configured operating system andapplications). The process requires you to select the system state image for the failed source from the target image server and identify thereplacement server, called the recovery server, where you want to recover the data to. There is no need to select files or remember whendata is stored. Livewire does not even need to be installed on the recovery server. Recovery can be used if the entire source server is lostand you must replace it with a new one. The recovery process will install Livewire, if necessary, and copy all of the data, including thesystem state to the recovery server. After the recovery process is complete and the recovery server is restarted, it will have the identity anddata of the original failed source.Snapshot SupportDouble-Take Livewire integrates with Microsoft Volume Shadow Copy Service to allow you to schedule and recover from up to 512 point-in-time copies of data on your Double-Take target. This allows administrators to easily recover an entire server from problems caused byviruses, corruption or human error. When recovering from a snapshot, the entire server (including the OS, Applications and data) isrecovered to a consistent point based on which snapshot is selected.Broad Application SupportLivewire protects the entire server so there is no need for specialised application support as is the case with tape backup solutions.Livewire supports most business-critical applications and replicates between any configuration of physical and virtual systems. 5Untitled DocumentWHITE PAPER: LIVEWIRE: FULL-SERVER PROTECTION AND RECOVERY IN REAL-TIMEProtection Scenarios Using LivewireLivewire in a Branch Office ScenarioWell-prepared businesses know that deploying the right resources, processes and technology to protect key information and minimisedowntime at their main headquarters is important. But having adequate resources and technology in place for protecting invaluable datain branch offices is just as important, though often overlooked. In a survey conducted in 2005 by the Ad Council, most businesses agreed that emergency preparedness is important, yet only 39% saidtheir company had a plan in place. In companies with distributed branch offices, data protection strategies may not have kept up with thereality that branch or remote offices now contain customer databases, e-mail servers and financial information that are critical to thecompany s day-to-day operation. The traditional approach relying on tape backup for branch-office data protection is costly and risky.For example, in addition to the initial tape backup hardware, software, and installation costs for each branch, add the continual costs oftape media, maintenance, and off-site transport and storage. Many companies also can t afford to have IT staff in branch offices, so theyincur additional IT support costs for the regular technical maintenance and verification of the branch backups. For untrained non-technical staff in branch offices, being responsible for consistent, reliable backup can be tough. Backups may failwithout the branch staff noticing. Improper labelling, shortcuts, and rotating and removing tapes can result in lost data and slowrecovery. Also, if the branch employees have never tested the recovery process, they won t be familiar with how to execute it when adisruption occurs. As a result, in the event of a disaster the branch could be down for a prolonged period of time and often requires theassistance of the central IT staff. Tape hardware and backup software can be a headache even before they fail. Required hardware andsoftware are expensive, as is the labor required to set up and maintain them. Tape cartridges are a continuing cost and completing dailytape backups requires heavy administrative intervention. If you have multiple branch or remote offices, (a recent census bureau surveyindicates the average company has 50 locations) you have to set up tape equipment and allocate administrative supervision for each, ortry to manage backups with no local IT support. Livewire for a More Complete DR Strategy Organisations of all sizes are increasingly dependent on computerised data systems for their operations. Ensuring that these systems keepoperating is a critical part of business planning. Business Continuity (BC) is strategy that ensures critical data and systems remainavailable even if hardware, software or environmental problems interrupt the primary server s normal operation. Gartner researchemphasises that not only do laws and regulations dictate BC planning, but also that organisations are accountable for their systems andprocesses related to data. The bottom line is that laws and regulations, as well as shareholders, expect organisations to exercise duecare to ensure that necessary data is available. 6The simplest approach to business continuance is to treat all data as equal, and equally important to business operations. However, thisapproach leads to unnecessary cost and complexity; many areas of the Windows infrastructure already have fault resilience. For example,Active Directory s multiple-master replication model means that loss of one or more domain controllers is survivable as long as at leastone DC remains. Likewise DNS, WINS, and most other infrastructure servers can handle the loss of one or more participants. Furthermore,the design of these services is such that a failed server can often quickly be replaced or rebuilt, and its data restored via replication fromits remaining peers. In addition, no two workloads within an organisation have the same importance to the operation of the businesson a day-to-day basis. Line-of-business applications and their associated data, messaging, database, resource planning and other criticalsystems carry the data that a business cannot operate without, so it s critical to ensure that the data is protected. SummaryRecovering your production server from backup using traditional recovery solutions can be a cumbersome and stressful process. Complexrestoration software and the inability of solutions like tape backup to protect data in real-time don t improve the situation. Livewireprovides a better alternative real-time data protection with a streamlined recovery process that reduces the time and effort involvedwith server recovery. Livewire or Livewire Optionin conjunction with Double-Take protects the entire production server, including systemstate data, so there s no need to provision a new server or reinstall applications.66 Noakes-Fry, Kristen, et. al. Laws Influence Business Continuity and Disaster Recovery Planning Among Industries. Gartner. 11 July 2005.Untitled Document Double-Take Software, Inc. All rights reserved. Double-Take, GeoCluster, Double-Take for Virtual Systems, TimeData, netBoot/i, winBoot/i, Double-Take Cargo, sanFly, NSI, Balance, Double-TakeShadowCaster, and associated logos are registered trademarks or trademarks of Double-Take Software, Inc. and/or its subsidiaries in the United States and/or other countries. Microsoft, Windows,and the Windows logo are trademarks or registered trademarks of Microsoft Corporation in the United States and/or other countries. VMware is a registered trademark of VMware. Linux is aregistered trademark of Linus Torvalds. Red Hat is a registered trademark of Red Hat, Inc. in the United States and other countries. All other trademarks are the property of their respectivecompanies. Get the standard today: www.doubletake.com or +44(0)1905 745 711WHITE PAPER: LIVEWIRE: FULL-SERVER PROTECTION AND RECOVERY IN REAL-TIMEAbout Double-Take Software Headquartered in Southborough, Massachusetts, Double-Take Software (Nasdaq: DBTK) is a leading provider of affordable software forrecoverability, including continuous data replication, application availability and system state protection. Double-Take Software productsand services enable customers to protect and recover business-critical data and applications such as Microsoft Exchange, SQL, andSharePoint in both physical and virtual environments. With its unparalleled partner programs, technical support, and professional services,Double-Take Software is the solution of choice for more than ten thousand customers worldwide, from SMEs to the Fortune 500.Information about Double-Take Software's products and services can be found at www.doubletake.com. Manage your subscription to eNews. 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