Dell SE500W manual Configuring Active and Passive Cluster Nodes, Failover and Failback

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Configuring Active and Passive Cluster Nodes

Active nodes process application requests and provide client services. Passive nodes are backup nodes that ensure that client applications and services are available if a hardware or software failure occurs. Cluster configurations may include both active and passive nodes.

NOTE: Passive nodes must be configured with appropriate processing power and storage capacity to support the resources that are running on the active nodes.

Your cluster solution supports variations of active/active (activex) and active/passive (activex/passivex) configurations. The variable x indicates the number of nodes that are active or passive.

Cluster solutions running the Windows operating system support active/active and active/passive configurations.

An active/active (activex) configuration contains virtual servers running separate applications or services on each node. When an application is running on node 1, the remaining node(s) do not have to wait for node 1 to fail. Those node(s) can run their own cluster-aware applications (or another instance of the same application) while providing failover for the resources on node 1. For example, multiway failover is an active/active failover solution because running applications from a failed node can migrate to multiple active nodes in the cluster. However, you must ensure that adequate resources are available on each node to handle the increased load if one node fails.

•In an active/passive (activex/passivex) configuration, one or more active cluster nodes are processing requests for a clustered application while the passive cluster nodes only wait for the active node(s) to fail.

Failover and Failback

This section provides information about the failover and failback capabilities of the Cluster Service.

Failover

When an individual application or user resource (also known as a cluster resource) fails on a cluster node, the Cluster Service will detect the application failure and try to restart the application on the cluster node. If the restart attempt reaches a preset threshold, the Cluster Service brings the running application offline, moves the application and its resources to another cluster node, and restarts the application on the other cluster node(s). This process of automatically moving resources from a failed cluster node to other healthy cluster node(s) is called failover.

In order to fail over and fail back running applications, cluster resources are placed together in a group so the Cluster Service can move the cluster resources as a combined unit. This process ensures that the failover and/or failback procedures transfer all of the user resources as transparently as possible.

Using MSCS

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Contents Installation and Troubleshooting Guide Abbreviations and Acronyms Contents Updating the Windows Driver for the Perc RAID Adapter Assigning Static IP Addresses to Your ClusterNaming and Formatting Drives on Configuring Microsoft Windows Server Installing and Configuring Microsoft WindowsMicrosoft Cluster Administrator Uninstalling Mscs From Clusters Running Setting Advanced Resource PropertiesConfiguring Active and Passive Cluster Nodes Configurations Using Non-Dell ProductsPowerEdge Cluster SE500W Solution Data Form Changing the Cluster Service Account PasswordMaximum Configuration of the PowerEdge Applications and Hardware Requiring Power Cabling Example With Two PowerBus Configuration Switch Modes Important System Warning Private Network Hardware ComponentsIntroduction IntroductionIntended Audience Obtaining More InformationVirtual Servers and Resource Groups Obtaining Technical Assistance OverviewQuorum Resource Shared Storage Systems PowerEdge Cluster SE500W SolutionOperating Systems Storage System Configuration, at least three virtual disks are recommendedEdition X64 Edition Cluster Components Hardware and Software TechnologiesScsi cables System RequirementsCluster storage Cluster NodesCluster Node Requirements Component Minimum Requirement Other Documents You May Need Cabling Your Cluster Hardware Cabling for the Cluster SE500W SolutionCabling Your Cluster Hardware Redundant power supply Shared storage Shared storage connector BPin connector NodePin connectors Cabling Your Cluster Hardware Adapter Channel 0 Perc RAID adapter channel Pin connectorsNetwork Connections Description Cabling Your Public and Private NetworksPrivate network adapter Cluster node Cabling Your Public NetworkNIC Teaming Cabling Your Private NetworkPrivate Network Hardware Components and Connections Method Cabling the Mouse, Keyboard, and Monitor Power Cabling for the PowerEdge Cluster SE500W SolutionPage Power Cabling Example With One Power Supply in the Systems Power Cabling Example With Two Power Supplies in the Systems Cabling Your Cluster Hardware Before You Begin Preparing Your Systems for ClusteringPreparing Your Systems for Clustering Installation Overview Selecting a Domain Model Configuring the Cluster Nodes as Domain ControllersInstalling and Configuring the Windows Operating System Configuring the Internal Drives in Your Cluster NodesPreparing Your Systems for Clustering Configuring Windows Networking Dell recommends using static IP addresses for your cluster Configuring IP Addresses for the Private NetworkHas been corrected in Windows Server Preparing Your Systems for Clustering Verifying Cluster Network Communications Configuring the Internet Connection FirewallUpdating the Windows Driver for the Perc RAID Adapter Installing the Perc RAID AdaptersClustering PowerVault Storage Systems Installing and Configuring the Shared Storage SystemSplit-Bus Module Module Primary Split-busPage Enclosure Management Module EMM EMM serves two primary functions in your storage systemPreparing the Perc RAID Adapter for Clustering Setting the Scsi Host Adapter IDs Enabling the Cluster Mode Using the Perc RAID AdapterNaming and Formatting Drives on the Shared Storage System Configuring and Managing Virtual DisksAssigning Drive Letters and Mount Points EmailData Verifying Cluster Readiness Installing and Configuring MscsCreating the Quorum Resource Configuring Cluster Networks Running WindowsConfiguring Cluster Networks Running Windows Server Preparing Your Systems for Clustering Adding Cluster Nodes Using the Advanced Configuration Option Verifying Cluster Resource Availability Installing Applications in the Cluster GroupVerifying Cluster Functionality Verifying Mscs OperationObtaining More Information Troubleshooting Failed ResourcesRunning Cluster Administrator on a Remote Console Installing Your Cluster Management SoftwareMicrosoft Cluster Administrator Launching Cluster Administrator on a Cluster NodeLaunching Cluster Administrator on a Remote Console Cluster Networks Using MscsUsing Mscs Cluster ObjectsNode-to-Node Communication Network InterfacesCluster Nodes Preventing Network FailureJoining an Existing Cluster Forming a New ClusterCluster Resources GroupsDependent Resources Setting Resource PropertiesSetting Advanced Resource Properties Configuring Resource DependenciesCluster Resources and Required Dependencies Resource Parameters Resources and Configurable ParametersQuorum Disk Quorum Resource Resource Failure Creating a New Resource Adjusting the Threshold and Period ValuesFile Share Resource Type Deleting a ResourceFailover and Failback Configuring Active and Passive Cluster NodesFailover Using Mscs Failback Using Mscs Certification Requirements Upgrading Your System to a Cluster ConfigurationUpgrading Your Operating System Configurations Using Non-Dell ProductsCompleting the Upgrade Upgrading Your System to a Cluster ConfigurationBefore you perform a rolling upgrade Performing a Rolling UpgradeUpgrading Node Adding a Network Adapter to a Cluster Node Maintaining Your ClusterMaintaining Your Cluster IP address Maintaining Your Cluster Running chkdsk /f on a Quorum Disk Removing Nodes From Clusters Running Windows ServerRecovering From a Corrupt Quorum Disk Replacing a Cluster Node Replacing a Cluster-Enabled Dell Perc RAID AdapterWhere clustername is the name of your cluster Reformatting a Cluster Disk Maintaining Your Cluster Rebuilding Operation in Dell OpenManage Utilities Maintaining Your Cluster Maintaining Your Cluster Troubleshooting TroubleshootingPerc 3/DC Bios Troubleshooting Administrator’s Guide for instructions on Viewer, see the Microsoft Cluster ServiceSupport.microsoft.com Troubleshooting Troubleshooting Abbreviations and Acronyms Abbreviations and AcronymsGUI NLB RAM Abbreviations and Acronyms Cluster Data Form PowerEdge Cluster SE500W Solution Data FormCluster Data Form System Storage Node Server Type Cluster Name Service Tag Number Server NameStorage, internal drives Dell PowerVault Description of Installed ItemsDrive letters, RAID types, applications/data Component StorageW . d e l l . c o m s u p p o r t . d e l l . c o m Index IndexMscs Shared storage system configuring, 39 enclosure management Replacing a cluster-enabledcardVirtual disks, 45 using dynamic disks Index Example of Network Cabling Connection PowerVault 22 xS Back PanelPage Table A-1 General Cluster Troubleshooting
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