Richard,
As Simon notes in 3.5 they were expanded and where a pain; however this
has since been tidied up and now works as it "should".
So any further node added to a group will inherit the relevant parts of
the config.
i.e. (I've snipped the boring bits out)
mmlsnodeclass
Node Class Name Members
---------------------
-----------------------------------------------------------
site2 s2gpfs1.site2,s2gpfs2.site2
mmchconfig pagepool=2G -N site2
mmshutdown -a
mmstartup -a
mmdsh -N nsdnodes "mmdiag --config | grep page"
s2gpfs3.site2: pagepool 1073741824
s2gpfs3.site2: pagepoolMaxPhysMemPct 75
s2gpfs2.site2: ! pagepool 2147483648
s2gpfs2.site2: pagepoolMaxPhysMemPct 75
s2gpfs1.site2: ! pagepool 2147483648
s2gpfs1.site2: pagepoolMaxPhysMemPct 75
mmchnodeclass site2 add -N s2gpfs3.site2
mmshutdown -N s2gpfs3.site2
mmstartup -N s2gpfs3.site2
mmdsh -N nsdnodes "mmdiag --config | grep page"
s2gpfs2.site2: ! pagepool 2147483648
s2gpfs2.site2: pagepoolMaxPhysMemPct 75
s2gpfs1.site2: ! pagepool 2147483648
s2gpfs1.site2: pagepoolMaxPhysMemPct 75
s2gpfs3.site2: ! pagepool 2147483648
s2gpfs3.site2: pagepoolMaxPhysMemPct 75
-- Lauz
On 2017-01-27 12:43, Simon Thompson (Research Computing - IT Services)
wrote:
I think this depends on you FS min version.
We had some issues where ours was still set to 3.5 I think even though
we have 4.x clients. The nodeclasses in mmlsconfig were expanded to
individual nodes. But adding a node to a node class would apply the
config to the node, though I'd expect you to have to stop/restart GPFS
on the node and not expect it to work like "mmchconfig -I"
Simon
From: <[email protected]> on behalf of "Sobey,
Richard A" <[email protected]>
Reply-To: "[email protected]"
<[email protected]>
Date: Friday, 27 January 2017 at 11:12
To: "[email protected]"
<[email protected]>
Subject: ?spam? [gpfsug-discuss] Nodeclasses question
All,
Can it be clarified whether specifying “-N ces” (for example, I
have a custom nodeclass called ces containing CES nodes of course)
will then apply changes to future nodes that join the same nodeclass?
For example, “mmchconfig maxFilesToCache=100000 –N ces” will
give existing nodes that new config. I then add a 5th node to the
nodeclass. Will it inherit the cache value or will I need to set it
again?
Thanks
Richard
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