Can a node be added to an existing cluster package online

[Ramprakash Surulirajan_1]

We have a one node cluster running an oracle package where we are planning to add another node to cluster and also add that node as adoptive node to the existing package. I know we can add the node to cluster online without taking down the cluster but can we add the node to the package configuration online without taking down the package.

[njia_1 · Accepted solution]

YES I believe that you can, the following changes can be made when package is running.

Modifiy node failover order
Add/Remove a node_name
Modify package parameters (switching timeouts)

# cmgetconf -v -p package_name pkg.conf
then change the conf file
# cmapplyconf -v -P pkg.conf

When do I need to bring the package down ?
Add or remove Service
Add or remove subnet
Add or remove resource (EMS)

[Geoff Wild]

Interesting question, according to:

http://docs.hp.com/en/B3936-90095/B3936-90095.pdf

It doesn't say (Table 7-2).

You can add the node while cluster is running, you can change the order of nodes for a package for startup - so, I don't see why you can't add a node to a package while it is running.

Try it and let us know.

Rgds...Geoff

[melvyn burnard]

Well yes you CAN add a node online, but in this case you need to halt and rebuild the cluster unless you have already allowed for this addition.
As you have a single node cluster, adding a second node will REQUIRE you to have a cluster lock mechanism in place.
This means youwill either have to have a cluster lock disc on your shared storage, or set up an external Quorum Server and then use this as your cluster lock mechanism.
Either of these cannot be done online, so unless you had set up the single node cluster already with a cluster lock mechanism, you will need to halt the cluster and reapply the configuration with this added.