Part 6: RAC/Linux/Firewire - Cluster Manager Setup

Cluster Manager Setup

The cluster manager software is how the Oracle instances communicate their activities. Obviously this is an important piece to the puzzle as well. Here I review the configs, and then show how to get it up and running on each node. I *DID NOT* patch the cluster manager with the 9.2.0.2 db patch, but your mileage may vary.



Edit file $ORACLE_HOME/oracm/admin/cmcfg.ora



HeartBeat=10000

ClusterName=Oracle Cluster Manager, version 9i

PollInterval=300

PrivateNodeNames=zenith utopia

PublicNodeNames=zenith utopia

ServicePort=9998

HostName=zenith

#CmDiskFile=/ocfs/oradata/foo

MissCount=5

WatchdogSafetyMargin=3000

WatchdogTimerMargin=6000



Note, if you patch oracm to 9.2.0.2, remove the two Watchdog lines, and uncomment and use the CmDiskFile.



Edit file $ORACLE_HOME/oracm/admin/ocmargs.ora



watchdogd -d /dev/null -l 0

oracm /a:0

norestart 1800



Note, if you patch oracm to 9.2.0.2, comment out the watchdog line.



Now *AS ROOT* start up the cluster manager:

$ ./$ORACLE_HOME/oracm/bin/ocmstart.sh



You should see 8 processes with "ps -auxw | grep oracm". Note that if you are running RH8, there's a new ps which needs a special option "m" to notice threads. Apparently oracm is threaded (Thanks Wim). This had me pulling my hair out for weeks, and I'm bald! Anyway if that is the case, use "ps auxwm | grep oracm". One more little recommendation. oracm is communicating via a port which you define. If you're using iptables/ipchains, or some other firewall solution, I would recommend disabling it, at least temporarily, until you know you've configured everything right. Then reenable it, being sure you are good at configuring just the ports you need.



15. Perform step 14 on node 2.



Part 1 - Introduction
Part 2 - Basic Costs + Hardware Platform Outline
Part 3 - Software Requirements, Versions, etc
Part 4 - Initial Oracle Setup
Part 5 - Firewire + OCFS Setup
Part 6 - Cluster Manager Setup
Part 7 - Cluster Database Setup
Part 8 - Review of Clustered Features + Architecture
Part 9 - A quick 9iRAC example
Part 10 - Summary