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the application or service; for example, for a le server, a context menu option is added to add a shared folder and storage, as shown in Figure 18-35
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FIGURE 18-35 Adding new resources to a cluster group By default, when you add a le server, a hidden share is added However, you probably want a better named share for use by clients, so select to add a shared folder, which allows a location to be speci ed on one of the storage devices to be shared (see Figure 18-36) You can additionally create new folders via the Browse dialog Additional storage can be added via the Provision Storage button if required The rest of the wizard is self-explanatory and allows NTFS permissions to be changed if required Although not recommended, the SMB share name can be con gured and created, and if Network File System (NFS) is installed, an NFS share is also added Advanced settings for the SMB can be con gured, allowing con guration of the maximum number of users, of ine settings, and if access-based enumeration is enabled The share permissions can also be con gured to allow for custom permissions For example, you can set it up so everyone has only read access, or where administrators have full control and everyone else has only read access, or where administrators have full control and everyone else has read and write permissions One great feature of Windows Server 2008 is the total integration of failover clustering with the Windows shell For example, if you create a share using Explorer on a disk that is owned by the cluster, the share is automatically added to the le server cluster service instead of being de ned locally on the server This is part of the ease of use of clustering The shell understands the action being performed, decides the share should be created on the cluster, and creates as needed
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FIGURE 18-36 Creating a new shared folder
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There are numerous aspects to managing failover clustering, such as simple day-to-day maintenance tasks, failing resources between nodes in the cluster, and modifying the con guration of the cluster (such as modifying the quorum scheme)
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After a cluster is created and resource groups exist, you can test moving the resource group to another node in the cluster via the Move This Service or Application to <Node> action; you are prompted to con rm the move operation The current owner of a resource group is displayed in the summary of the resource group When a move operation is initiated, the move process is seen as the resources in the group are taken of ine and then brought online on the
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new active node for the group, as shown in Figure 18-37 This process is fast and should last for only a few seconds, and users should see only a minor service interruption
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FIGURE 18-37 The move process The move process is useful for planned maintenance procedures: Move the resource group to a passive node from an active node, perform maintenance on the now-passive node while it is not running any resource groups, reboot, and then move resource groups back to the nowmaintained node If a node crashes, the other nodes in the cluster detect the unavailability, and any resource groups that the node owned is transferred to another node in the cluster A critical event log is written to the System event log of ID 1135 Example event log text content is shown here:
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Cluster node savdalha02 was removed from the active failover cluster membership The Cluster service on this node might have stopped This could also be due to the node having lost communication with other active nodes in the failover cluster Run the Validate a Con guration wizard to check your network con guration If the condition
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