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<tt>You are absolutely right. Sorry about that. I think I didn't have
enough caffeine this morning ;-).<br>
<br>
The procedure is when you have available slots and just want to add a
node to the cluster.<br>
<br>
Any change to the superblock needs to have the partition offline.<br>
<br>
You don't need to umount to upgrade database/clusterware. <br>
<br>
In some situations, you need to upgrade ocfs2 in sync, meaning, all
nodes at once. Other times, you can run different versions in the same
cluster until you get all nodes upgraded. That is documented in the FAQ.<br>
<br>
If you plan to add more nodes later, it would be a good idea to have
additional slots defined to reduce cluster outage.<br>
<br>
About having it done online (with partitions mounted), I don't think we
will have it.<br>
<br>
<br>
</tt>
<pre class="moz-signature" cols="72">Regards,
Marcos Eduardo Matsunaga
Oracle USA
Linux Engineering
</pre>
<br>
<br>
Tim Lank wrote:
<blockquote
cite="mid:11039.151.207.242.4.1191248012.squirrel@www.timlank.com"
type="cite">
<pre wrap="">So since tunefs.ocfs2 is the tool that actually does all of the work to
add more slots and the tunefs.ocfs2 man page states:
DESCRIPTION
tunefs.ocfs2 is used to adjust OCFS2 file system parameters on disk.
In order to prevent data loss, tunefs.ocfs2 will not perform any
action on the specified device if it is mounted on any node in the
cluster. This tool requires the O2CB cluster to be online.
I return to my original question:
"Is it true that we will need to umount these filesystems for the upgrade
(i.e. Database and Clusterware also)?"
Since our cluster is running entirely on ocfs2 filesystems, this will
cause a cluster outage.
Is there a way to do this while the filesystems are mounted? If not, are
there plans for allowing a node count increase while the fileystems are
mounted, and if so, when?
</pre>
<blockquote type="cite">
<pre wrap="">The console does that (You can use the console to add a new node).
tunefs.ocfs2 is actually the tool that will change the superblock to add
more slots (see the man pages) and it is called by the console (a more
user friendly interface) to perform the action.
o2cb_ctl only defines the new node(s) on the existing nodes that are
running.
Regards,
Marcos Eduardo Matsunaga
Oracle USA
Linux Engineering
Tim Lank wrote:
</pre>
<blockquote type="cite">
<pre wrap="">So does the o2cb_ctl command touch the ocfs2 filesystem superblock and
increase the node slot value in this example?
</pre>
<blockquote type="cite">
<blockquote type="cite">
<pre wrap="">From
<a class="moz-txt-link-freetext" href="http://oss.oracle.com/projects/ocfs2/dist/documentation/ocfs2_faq.html">http://oss.oracle.com/projects/ocfs2/dist/documentation/ocfs2_faq.html</a>
</pre>
</blockquote>
<pre wrap="">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
<a class="moz-txt-link-rfc2396E" href="http://oss.oracle.com/bugzilla/show_bug.cgi?id=741"><http://oss.oracle.com/bugzilla/show_bug.cgi?id=741></a>. 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:
</pre>
<blockquote type="cite">
<pre wrap="">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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</pre>
</blockquote>
</blockquote>
<pre wrap="">
</pre>
</blockquote>
</blockquote>
<pre wrap=""><!---->
</pre>
</blockquote>
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