ExpressCluster X 2.0 for Windows Reference Guide - Nec

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Chapter 6 Group resource details 436 Routing You do not need to make settings for the routing table. Conditions to use Floating IP addresses are accessible to the following machines: � Cluster server itself � Other servers in the same cluster and the servers in other clusters � Clients on the same LAN as the cluster server and clients on remote LANs If the following conditions are satisfied, machines other than the above can also access floating IP addresses. However, connection is not guaranteed for all models or architectures of machines. Test the connection thoroughly by yourself before using those machines. � TCP/IP is used for the communication protocol. � ARP protocol is supported. Even over LANs configured with switching hubs, floating IP address mechanism works properly. When a server goes down, the TCP/IP connection the server is accessing will be disconnected. ExpressCluster X 2.0 for Windows Reference Guide
Notes on floating IP resources Section II Resource details Understanding floating IP resources If OS stalls with the floating IP address activated, the resource failover may fail when the following settings are made: � Run ping .is On. � Forced FIP Activation is Off. This problem occurs due to the following causes: � A part of OS stalls (as examples below) with the floating IP address activated. - Network modules are running and respond to ping from other nodes � When activating the floating IP address on the server to which the resource is failed over, if the ping command is executed to the IP address to be activated in order to prevent redundant activation, ping reaches the IP address because of the reason above, and the resource activation error occurs In the machine environment where this problem often occurs, this can be prevented by the settings below. However, both groups may be activated depending on the status of a stall, and server shutdown may occur depending on the timing of the activation of both groups. � Specify “Off” to Run ping Overlap check is not performed to the floating IP address. � Specify “On” to Forced FIP Activation The floating IP address is activated forcibly even when the address is used on a different server. * When Run ping is set to On and Forced FIP Activation is set to Off server1 server1 stalling Failover failed Floating IP Client Accessible to floating IP address server2 server1 1. OS stalled with IP address activated Floating IP Client Floating IP server2 2. Activation failed because ping reached Accessible to floating IP address 437
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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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The following is the description of
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For hybrid disk resource Section I
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(6) Current server (only hybrid dis
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When you click the icon of the serv
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Limitations of the WebManager Secti
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Error Detected disk error while rec
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Chapter 2 Functions of the Integrat
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Chapter 4 ExpressCluster command re
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Return Value --grp [group_name] Sec
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Status Descriptions Server Function
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Operating the cluster (clpcl comman
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Message Cause/Solution Internal com
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Example of Execution The following
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Collecting logs (clplogcc command)
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Execution Result Section I Detailed
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Modifying the log level and size Se
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Types that can be specified for the
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Type Level Size (byte) hdsnapshot 8
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Mirror disk resource operation comm
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Message Cause/Solution clpmdctrl fa
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Hybrid disk status display command
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Mirror Color Hybrid disk status in
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CPU frequency control command clpcp
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EXEC_SCRIPT IP: Specified script (s
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New password: ********** Retype new
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Permission Select one of following
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Public LAN (Also used for Interconn
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Returning from monitor error (Norma
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appli1 Section II Resource details
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Configuration example Interval 60
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ecovery target. Failover Target Ser
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Replace Section II Resource details
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Understanding IP monitor resources
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IP Address SuspendResume Section II
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User Name Within 255 bytes SuspendR
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Chapter 8 Heartbeat resources This
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Chapter 9 Details on network partit
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PING network partition resolution r
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The alarms command option -N [targe
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Mail report actions Section II Reso
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Section III Maintenance information
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Chapter 11 The system maintenance i
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Chapter 12 Troubleshooting This cha
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When activating or deactivating net
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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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� While mirror recovery is in pro
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Recovering mirror using the WebMana
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Chapter 13 Error messages Messages
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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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