ExpressCluster X 2.0 for Windows Reference Guide - Nec

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Chapter 9 Details on network partition resolution resources COM network partition resolution resources 724 Note 1 COM network partition resolution resource can be used between two servers. When mirror disk resources are used, be sure not to use COM network partition resolution resource. Note 2 Emergent shut down takes places in all servers if all heartbeats are disconnected while the COM channel is having an error (for example COM port or serial cross cable.) Note 3 If failures occur in all network channels between cluster servers and the COM channel simultaneously, both active and standby servers fail over. This can cause data corruption due to access to the same resource from multiple servers. Displaying the properties of COM network partition resolution resources with the WebManager 1. Start the WebManager. (http://FIP_address_for_WebManager_group: port_number (the default value is 29003)). 2. Click the COM network partition resolution resource object, , in the tree view. The following information is displayed in the list view. Server Name: Server name Status: Status of the network partition resource on the given server If you click the Details button, the following information is displayed in the dialog box. Name: COM network partition resolution resource name Type: COM network partition resolution resource type Comment: Comment of the COM network partition resolution resource Status: Status of all COM network partition resolution resources Port Name: Port name used for COM network partition resolution ExpressCluster X 2.0 for Windows Reference Guide
Section II Resource details Understanding network partition resolution by DISK method Understanding network partition resolution by DISK method Settings of the DISK network partition resolution resources The following settings are required to use DISK network partition resolution resource: � Allocate a dedicated disk partition for disk heartbeat resource on the shared disk. It is not necessary to format the partition. � Allocate driver letters for the disk partition on the shared disk. The drive letters do not have to be the same for all the servers. DISK network partition resolution resources cause an emergency shutdown in servers that cannot communicate with the first priority server when a network partition is detected. Normal operation Partition for disk heartbeat resource All networks are disconnected Shut down The server is shut down to prevent activation of the same group in both servers. When a cluster is configured with two or more servers, DISK network partition resolution resources can be used as described below. DISK network partition resolution resources can be set to be used by servers that use the shared disk in a cluster. For more information, refers to “Disk I/F tab” in Chapter 3, “Fuction of the Builder.” 725
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ExpressCluster ® X 2.0 for Windows
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© Copyright NEC Corporation 2008.
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vi How to verify the status of each
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Network warning light switch off co
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x Service resources................
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xii Displaying NAS monitor resource
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Displaying and changing the details
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xvi IP monitor resource ...........
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ExpressCluster X Documentation Set
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Contacting NEC For the latest produ
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Chapter 1 Functions of the WebManag
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Section I Detailed functions of Exp
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Server Name: Select this to search
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Module type Category pm ExpressClus
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Mirror disk helper Overview of the
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Status Descriptions Server Function
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Collecting logs (clplogcc command)
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Hybrid disk status display command
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Displaying the application resource
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Understanding floating IP resources
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Understanding mirror disk resources
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Displaying the mirror disk resource
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Understanding registry synchronizat
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Server 1 Group A 1 Start Stop Group
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ecovery target. Failover Target Ser
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Understanding IP monitor resources
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Recovering a suspended server (with
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Checking the mirror break status wi
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3. Logically examine the data on th
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Chapter 13 Error messages Messages
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Chapter 13 Error messages SQL Serve
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Appendix This section covers: • A
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Appendix A Glossary 862 Mirror conn
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Appendix B Index Displaying and cha
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Appendix B Index Floating IP, 435 F
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Appendix B Index Settings of the PI
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