[Ocfs2-users] Question about increasing node slots

[Marcos E. Matsunaga]

>From http://oss.oracle.com/projects/ocfs2/dist/documentation/ocfs2_faq.html

19 - How do I add a new node to an online cluster?
You can use the console to add a new node. However, you will need to
explicitly add the new node on all the online nodes. That is, adding on
one node and propagating to the other nodes is not sufficient. If the
operation fails, it will most likely be due to bug#741
<http://oss.oracle.com/bugzilla/show_bug.cgi?id=741>. In that case, you
can use the o2cb_ctl utility on all online nodes as follows:

	# o2cb_ctl -C -i -n NODENAME -t node -a number=NODENUM -a ip_address=IPADDR -a ip_port=IPPORT -a cluster=CLUSTERNAME

Ensure the node is added both in /etc/ocfs2/cluster.conf and in
/config/cluster/CLUSTERNAME/node on all online nodes. You can then
simply copy the cluster.conf to the new (still offline) node as well as
other offline nodes. At the end, ensure that cluster.conf is consistent
on all the nodes.

20 - How do I add a new node to an offline cluster?

You can either use the console or use o2cb_ctl or simply hand edit
cluster.conf. Then either use the console to propagate it to all nodes
or hand copy using scp or any other tool. The o2cb_ctl command to do the
same is:

        # o2cb_ctl -C -n NODENAME -t node -a number=NODENUM -a ip_address=IPADDR -a ip_port=IPPORT -a cluster=CLUSTERNAME

Notice the "-i" argument is not required as the cluster is not online.


Regards,

Marcos Eduardo Matsunaga

Oracle USA
Linux Engineering





Tim Lank wrote:
> We have a test 10gR2 RAC cluster using ocfs2 filesystems for the
> Clusterware files and the Database files.
>
> We need to increase the node slots to accomodate new RAC nodes.  Is it
> true that we will need to umount these filesystems for the upgrade (i.e.
> Database and Clusterware also)?
>
> We are planning to use the following command format to perform the node
> slot increase:
>
> # tunefs.ocfs2 �N 3 /dev/mapper/mpath1p1
>
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