Users Guide

Cluster Constraints | Clustering
OMNM 6.5.3 Installation Guide 113
If the mediation server is communicating to a cluster of application servers then the value should
define all the application servers separated by a comma For example:
oware.application.servers=<application server A ip address>,<application
server B ip address>
Define this property on all mediation servers.
This configuration change is only for application and mediation server communication. The
mediation servers in a cluster still use multicast between themselves. If you use
oware.application.servers , you must (comma-separated) list all available servers wherever
you use it to bypass multicast.
OpenManage Network ManagerIf you make a mistake in installing portions of your cluster, remember
you must either re-source the Oware environment, or delete all files in
oware/temp (and restart
the process in question) before changes can be effective.
CAUTION:
Multicast is still required between the cluster mediation servers, or application servers in a cluster
unless you follow the instructions in the next section.
You can disable Multicast and using Unicast within a cluster. To do that, you must add this line to
the
installprops\lib\installed.properties file:
oware.unicast=true
And in file jgroups-channelfacotry-stacks.xml in $OWARE_ROOT/jboss-x.x/
server/oware/deploy/cluster/jgroups-channelfactory.sar/META-INF/
change
the following:
CAUTION:
Make sure you modify stack “tcp” not “tcp-sync”
Comment this portion:
<stack name="tcp"
<!--Alternative 1: multicast-based automatic discovery.
<MPING timeout="3000"
num_initial_members="3"
mcast_addr="${jboss.partition.udpGroup:230.11.11.11}"
mcast_port="${jgroups.tcp.mping_mcast_port:45700}"
ip_ttl="${jgroups.udp.ip_ttl:2}"/>
-->
Uncomment this portion:
<!-- Alternative 2: non multicast-based replacement for MPING. Requires a
static configuration of *all* possible cluster members.>
<TCPPING timeout="3000"
initial_hosts="${jgroups.tcpping.initial_hosts:localhost[7600],localhos
t[7600]}"
port_range="1"
num_initial_members="3"/-->