Cluster and a package

[Sagar Sirdesai]

Hi
I'm a new bie to SG clusters. I need understand how is cluster and package relate dto each other as I see we no where specify that a particular cluster will host thi spackage or no wehere in the package config do we mention that it will part of this cluster.
So how both are related.

[Manix]

in the cluster directory /etc/cmcluster/
we have a directory for the package "/etc/cmcluster/pkg1/.."containing the package control script & file confirming that it`s the part of the cluster whose configuration file is also present under '/etc/cmcluster/' as
/etc/cmcluster/clustername_asci.conf.

so do ls -l /etc/cmcluster
and you will see a cluster.conf file & the
directory for each package.

Thanks
Manix

[Ismail Azad]

Hi,

Cluster is your whole system as such. For example, you have 4 nodes and want to maintain high availability, that system would be your cluster.

Package is the network resource, disk resource and service process grouped to an entity called as package and should not be confused with the term "bundle". When your package is on the "failover type" mode, it is the "package" that fails over to the other node of the cluster as such and it is not your "node" that failsover. Packages run on different nodes of the cluster and depending on the type of package and the volume manager used, high availability through serviceguard is acheived.

Regards
Ismail Azad

[melvyn burnard]

In each package you will specify which nodes it can run on, and these are the nodes in the physical cluster.
Also, when adding packages intoa cluster, you modify the Cluster DataBase, or CDB, so all references to each other are held there.
I suggest you read the Managing Serviecguard manuals

[P Arumugavel]

Hi,

In simple, package is related to node and the node is related cluster. Each is dependent with each other.

Have a look on below blog. It may clear you.
http://thomasvogt.wordpress.com/2008/08/26/mcserviceguard-cluster-installation-on-hp-ux-1131/

Rgds...