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Full Discussion: One service, two nodes, HA
Top Forums UNIX for Dummies Questions & Answers One service, two nodes, HA Post 302580047 by cero on Wednesday 7th of December 2011 09:14:37 AM
Old 12-07-2011
To minimize the danger of split brain usually more than one channel for heartbeat is used. The HA-clusters I worked with used 3: user-lan, a seperate cluster-lan and disks. With this configuration I never encountered a split brain situation.
Why would you want to change the ip-addresses during a failover? A simple solution for this would be not to make the ip-addresses cluster resources but configure them locally.
 

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DSHBAK(1)						      General Commands Manual							 DSHBAK(1)

NAME
dshbak - format output from pdsh command SYNOPSIS
dshbak [OPTION].. DESCRIPTION
The dshbak program formats pdsh pdsh output for humans. Output from each node is consolidated, the leading "node:" is stripped, and a header block with the node name is added. If the -c option is specified, nodes with identical output are not displayed twice; instead, the header will contain a list of nodes. The list of nodes is further compressed into node ranges if the node names have a numeric suffix. OPTIONS
-h Display a summary of command line options. -c Do not display identical output from nodes twice. Instead, print the list of nodes with matching output in the header block. -d DIR Write consolidated node output to separate files in output directory DIR. Any existing files will be overwritten. -f With -d, force creation of specified DIR. ORIGIN
A rewrite of IBM dshbak(1) by Jim Garlick <garlick@llnl.gov> on LLNL's ASCI Blue-Pacific IBM SP system. SEE ALSO
pdsh(1) http://pdsh.googlecode.com 2011-02-26 DSHBAK(1)
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