[gpfsug-discuss] control which hosts become token manager
Bryan Banister
bbanister at jumptrading.com
Tue Jul 24 22:12:06 BST 2018
Agree with Peter here. And if the file system and workload are of significant size then isolating the token manager to a dedicated node is definitely best practice.
Unfortunately there isn't a way to specify a preferred manager per FS... (Bryan starts typing up a new RFE...).
Cheers,
-Bryan
From: gpfsug-discuss-bounces at spectrumscale.org <gpfsug-discuss-bounces at spectrumscale.org> On Behalf Of Peter Childs
Sent: Tuesday, July 24, 2018 2:29 PM
To: gpfsug main discussion list <gpfsug-discuss at spectrumscale.org>
Subject: Re: [gpfsug-discuss] control which hosts become token manager
Note: External Email
________________________________
What does mmlsmgr show?
Your config looks fine.
I suspect you need to do a
mmchmgr perf node-1.psi.ch<http://node-1.psi.ch>
mmchmgr tiered node-2.psi.ch<http://node-2.psi.ch>
It looks like the node was set up as a manager and was demoted to just quorum but since its still currently the manager it needs to be told to stop.
>From experience it's also worth having different file system managers on different nodes, if at all possible.
But that's just a guess without seeing the output of mmlsmgr.
Peter Childs
Research Storage
ITS Research and Teaching Support
Queen Mary, University of London
---- Billich Heinrich Rainer (PSI) wrote ----
Hello,
I want to control which nodes can become token manager. In detail I run a virtual machine as quorum node. I don't want this machine to become a token manager - it has no access to Infiniband and only very limited memory.
What I see is that 'mmdiag -tokenmgr' lists the machine as active token manager. The machine has role 'quorum-client'. This doesn't seem sufficient to exclude it.
Is there any way to tell spectrum scale to exclude this single machine with role quorum-client?
I run 5.0.1-1.
Sorry if this is a faq, I did search quite a bit before I wrote to the list.
Thank you,
Heiner Billich
[root at node-2 ~]# mmlscluster
GPFS cluster information
========================
GPFS cluster name: node.psi.ch
GPFS cluster id: 5389874024582403895
GPFS UID domain: node.psi.ch
Remote shell command: /usr/bin/ssh
Remote file copy command: /usr/bin/scp
Repository type: CCR
Node Daemon node name IP address Admin node name Designation
--------------------------------------------------------------------------------
1 node-1.psi.ch a.b.95.31 node-1.psi.ch quorum-manager
2 node-2.psi.ch a.b.95.32 node-2.psi.ch quorum-manager
3 node-quorum.psi.ch a.b.95.30 node-quorum.psi.ch quorum <<<< VIRTUAL MACHINE >>>>>>>>>
[root at node-2 ~]# mmdiag --tokenmgr
=== mmdiag: tokenmgr ===
Token Domain perf
There are 3 active token servers in this domain.
Server list:
a.b.95.120
a.b.95.121
a.b.95.122 <<<< VIRTUAL MACHINE >>>>>>>>>
Token Domain tiered
There are 3 active token servers in this domain.
Server list:
a.b.95.120
a.b.95.121
a.b.95.122 <<<< VIRTUAL MACHINE >>>>>>>>>
--
Paul Scherrer Institut
Science IT
Heiner Billich
WHGA 106
CH 5232 Villigen PSI
056 310 36 02
https://www.psi.ch
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