Planning A Microsoft Windows Server 2003 Network Chapter 12

Planning A Microsoft Windows Server 2003 Network Chapter 12...

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Unformatted text preview: 70-293: MCSE Guide to Planning a Microsoft Windows Server 2003 NetworkChapter 12: Planning and Implementing Server Availability and Scalability70-293: MCSE Guide to Planning a Microsoft Window2ObjectivesUnderstand availability and scalabilityDifferentiate between server clustering and Network Load BalancingImplement server clusteringDescribe the concepts involved in server clusteringDescribe the concepts involved in Network Load BalancingImplement Network Load BalancingInstall applications on an NLB cluster70-293: MCSE Guide to Planning a Microsoft Window3Availability and ScalabilityAvailability: the percentage of time that servers are providing service on the network Scalability: the ability to expand the number of clients or data that a server can supportHow you implement availability and scalability depends on whether applications are stateful or stateless 70-293: MCSE Guide to Planning a Microsoft Window4Server AvailabilityPotential causes of server or service failureHardware failureNetwork failureAdministrator mistakesOperating system crashesApplication crashes70-293: MCSE Guide to Planning a Microsoft Window5Server Availability (continued)To provide higher server availability, you can use:Redundant hardware (e.g., RAID5)Uninterruptible power supply for temporary power outagesBackup power generator for longer power outagesRedundant paths through the network Standardized procedures to perform tasksFully document the network server configurationRegularly patched operating systems and applicationsWindows Server 2003 clustering to implement server clusters and Network Load Balancing70-293: MCSE Guide to Planning a Microsoft Window6ScalabilityScalability can be accomplished by:Scaling upScaling outTo scale up, you can:Add more RAMAdd a faster disk subsystemAdd more processorsScaling up can be both limiting and expensive70-293: MCSE Guide to Planning a Microsoft Window7Scalability (continued)Scaling out uses commonly available hardware rather than specialized hardwareDifficult when a single service is running on a server and you want to scale outNetwork Load Balancing (NLB)Best solution for scaling out a single applicationCan distribute the load between multiple serversNLB can sense a failed server70-293: MCSE Guide to Planning a Microsoft Window8Stateful and Stateless ApplicationsStateful applications require the server to retain knowledge about the client accessing the serverNot well suited to scale outEasier to scale upStateless applications do not require the server to retain knowledge about the client accessing the server Well suited to scale out70-293: MCSE Guide to Planning a Microsoft Window9Windows Server 2003 Clustering Windows Server 2003 provides two clustering mechanisms to provide availability and scalability:Server clusters NLB70-293: MCSE Guide to Planning a Microsoft Window10Server Clusters...
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This note was uploaded on 01/18/2010 for the course CET 2792 taught by Professor Georgewaynerausch during the Spring '09 term at Valencia.

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Planning A Microsoft Windows Server 2003 Network Chapter 12...

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