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<p>Thanks Lauz and Simon.</p>
<p><br>
</p>
<p>Next question and I presume the answer is "yes": if you specify a node explicitly that already has a certain config applied through a nodeclass, the value that has been set specific to that node should override the nodeclass setting. Correct?</p>
<p><br>
</p>
<p>Richard<br>
</p>
<br>
<br>
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<div id="x_divRplyFwdMsg" dir="ltr"><font style="font-size:11pt" face="Calibri, sans-serif" color="#000000"><b>From:</b> gpfsug-discuss-bounces@spectrumscale.org <gpfsug-discuss-bounces@spectrumscale.org> on behalf of laurence@qsplace.co.uk <laurence@qsplace.co.uk><br>
<b>Sent:</b> 27 January 2017 17:17<br>
<b>To:</b> gpfsug main discussion list<br>
<b>Subject:</b> Re: [gpfsug-discuss] ?spam? Nodeclasses question</font>
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<div class="PlainText">Richard,<br>
<br>
As Simon notes in 3.5 they were expanded and where a pain; however this <br>
has since been tidied up and now works as it "should".<br>
<br>
So any further node added to a group will inherit the relevant parts of <br>
the config.<br>
<br>
i.e. (I've snipped the boring bits out)<br>
<br>
mmlsnodeclass<br>
Node Class Name Members<br>
--------------------- <br>
-----------------------------------------------------------<br>
site2 s2gpfs1.site2,s2gpfs2.site2<br>
<br>
<br>
mmchconfig pagepool=2G -N site2<br>
mmshutdown -a<br>
mmstartup -a<br>
<br>
mmdsh -N nsdnodes "mmdiag --config | grep page"<br>
s2gpfs3.site2: pagepool 1073741824<br>
s2gpfs3.site2: pagepoolMaxPhysMemPct 75<br>
s2gpfs2.site2: ! pagepool 2147483648<br>
s2gpfs2.site2: pagepoolMaxPhysMemPct 75<br>
s2gpfs1.site2: ! pagepool 2147483648<br>
s2gpfs1.site2: pagepoolMaxPhysMemPct 75<br>
<br>
<br>
mmchnodeclass site2 add -N s2gpfs3.site2<br>
<br>
<br>
mmshutdown -N s2gpfs3.site2<br>
mmstartup -N s2gpfs3.site2<br>
<br>
<br>
mmdsh -N nsdnodes "mmdiag --config | grep page"<br>
s2gpfs2.site2: ! pagepool 2147483648<br>
s2gpfs2.site2: pagepoolMaxPhysMemPct 75<br>
s2gpfs1.site2: ! pagepool 2147483648<br>
s2gpfs1.site2: pagepoolMaxPhysMemPct 75<br>
s2gpfs3.site2: ! pagepool 2147483648<br>
s2gpfs3.site2: pagepoolMaxPhysMemPct 75<br>
<br>
<br>
-- Lauz<br>
<br>
On 2017-01-27 12:43, Simon Thompson (Research Computing - IT Services) <br>
wrote:<br>
> I think this depends on you FS min version.<br>
> <br>
> We had some issues where ours was still set to 3.5 I think even though<br>
> we have 4.x clients. The nodeclasses in mmlsconfig were expanded to<br>
> individual nodes. But adding a node to a node class would apply the<br>
> config to the node, though I'd expect you to have to stop/restart GPFS<br>
> on the node and not expect it to work like "mmchconfig -I"<br>
> <br>
> Simon<br>
> <br>
> From: <gpfsug-discuss-bounces@spectrumscale.org> on behalf of "Sobey,<br>
> Richard A" <r.sobey@imperial.ac.uk><br>
> Reply-To: "gpfsug-discuss@spectrumscale.org"<br>
> <gpfsug-discuss@spectrumscale.org><br>
> Date: Friday, 27 January 2017 at 11:12<br>
> To: "gpfsug-discuss@spectrumscale.org"<br>
> <gpfsug-discuss@spectrumscale.org><br>
> Subject: ?spam? [gpfsug-discuss] Nodeclasses question<br>
> <br>
> All,<br>
> <br>
> Can it be clarified whether specifying “-N ces” (for example, I<br>
> have a custom nodeclass called ces containing CES nodes of course)<br>
> will then apply changes to future nodes that join the same nodeclass?<br>
> <br>
> For example, “mmchconfig maxFilesToCache=100000 –N ces” will<br>
> give existing nodes that new config. I then add a 5th node to the<br>
> nodeclass. Will it inherit the cache value or will I need to set it<br>
> again?<br>
> <br>
> Thanks<br>
> <br>
> Richard<br>
> _______________________________________________<br>
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> gpfsug-discuss at spectrumscale.org<br>
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