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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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chosts(1M)						  System Administration Commands						chosts(1M)

NAME
chosts - expand cluster names into host names SYNOPSIS
$CLUSTER_HOME/bin/chosts name [name...] DESCRIPTION
The chosts utility expands the arguments into a list of host names. OPERANDS
The following operands are supported: name The parameter name can be a hostname or a cluster name. If name is a hostname, it is expanded to be a hostname. If name is a cluster name, that is, an entry exists in the /etc/clusters database (or a NIS or NIS+ map), it is expanded into the list of hosts that make up that cluster, as specified in the database. The list is typically used by programs that wish to operate on a list of hosts. If an entry for clusters has been made in the /etc/nisswitch.conf file, then the order of lookups is controlled by that entry. If there is no such file or no such entry, then the nameservice look up order is implicitly nis files. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWccon | +-----------------------------+-----------------------------+ |Interface Stability |Evolving | +-----------------------------+-----------------------------+ SEE ALSO
ccp(1M), cconsole(1M), cports(1M), crlogin(1M), cssh(1M), ctelnet(1M), clusters(4), attributes(5) Sun Cluster 3.2 8 Sep 2007 chosts(1M)
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