Then it should be the same as the OST case. The only difference between the two<div>is that we never allow two active MDSs on the same filesystem, so MDT is always active/passive. </div><div>cliffw<br><br><div class="gmail_quote">
On Tue, Jun 14, 2011 at 12:18 PM, Jeff Johnson <span dir="ltr"><<a href="mailto:jeff.johnson@aeoncomputing.com">jeff.johnson@aeoncomputing.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div text="#000000" bgcolor="#ffffff">
Apologies, I should have been more descriptive.<br>
<br>
I am running a dedicated MGS node and MGT device. The MDT is a
standalone RAID-10 shared via SAS between two nodes, one being the
current MDS and the second being the planned secondary MDS.
Heartbeat and stonith w/ ipmi control is currently configured but
not started between the two nodes.<div><div></div><div class="h5"><br>
<br>
<br>
On 6/14/11 12:12 PM, Cliff White wrote:
<blockquote type="cite">It depends - are you using a combined MGS/MDS?
<div>If so, you will have to update the mgsnid on all servers to
reflect the failover node,</div>
<div>plus change the client mount string to show the failover
node. </div>
<div>
otherwise, it's the same procedure as with an OST.</div>
<div>cliffw</div>
<div><br>
<br>
<div class="gmail_quote">On Tue, Jun 14, 2011 at 12:06 PM, Jeff
Johnson <span dir="ltr"><<a href="mailto:jeff.johnson@aeoncomputing.com" target="_blank">jeff.johnson@aeoncomputing.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0pt 0pt 0pt 0.8ex;border-left:1px solid rgb(204, 204, 204);padding-left:1ex">Greetings,<br>
<br>
I am attempting to add mds failover operation to an existing
v1.8.4<br>
filesystem. I have heartbeat/stonith configured on the mds
nodes. What<br>
is unclear is what to change in the lustre parameters. I
have read over<br>
the 1.8.x and 2.0 manuals and they are unclear as exactly
how to enable<br>
failover mds operation on an existing filesystem.<br>
<br>
Do I simply run the following on the primary mds node and
specify the<br>
NID of the secondary mds node?<br>
<br>
tunefs.lustre --param="failover.node=10.0.1.3@o2ib"
/dev/<mdt device><br>
<br>
where: 10.0.1.2=primary mds, 10.0.1.3=secondary mds<br>
<br>
All of the examples for enabling failover via tunefs.lustre
are for OSTs<br>
and I want to be sure that there isn't a different procedure
for the MDS<br>
since it can only be active/passive.<br>
<br>
Thanks,<br>
<br>
--Jeff<br>
<br>
------------------------------<br>
Jeff Johnson<br>
Aeon Computing<br>
<br>
<a href="http://www.aeoncomputing.com" target="_blank">www.aeoncomputing.com</a><br>
4905 Morena Boulevard, Suite 1313 - San Diego, CA 92117<br>
<br>
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</blockquote>
</div>
<br>
<br clear="all">
<br>
-- <br>
cliffw
<div>Support Guy</div>
<div>WhamCloud, Inc. </div>
<div><a href="http://www.whamcloud.com" target="_blank">www.whamcloud.com</a></div>
<div><br>
</div>
<br>
</div>
</blockquote>
<br>
------------------------------<br>
<pre cols="72">Jeff Johnson
Aeon Computing
<a href="http://www.aeoncomputing.com" target="_blank">www.aeoncomputing.com</a>
4905 Morena Boulevard, Suite 1313 - San Diego, CA 92117
</pre>
</div></div></div>
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<br></blockquote></div><br><br clear="all"><br>-- <br>cliffw<div>Support Guy</div><div>WhamCloud, Inc. </div><div><a href="http://www.whamcloud.com" target="_blank">www.whamcloud.com</a></div><div><br></div><br>
</div>