[gpfsug-discuss] Forcing which node gets expelled?

[Greg.Lehmann at csiro.au]

We hit something like this due to a bug in gskit. We all thought it was networking at first and it took me a fair bit of time to check all that. We have 7 nsd servers and around 400 clients running 4.2.0.4. We are just trying a workaround now that looks promising. The bug will be fixed at some point.

Cheers,

Greg

From: gpfsug-discuss-bounces at spectrumscale.org [mailto:gpfsug-discuss-bounces at spectrumscale.org] On Behalf Of Matt Thorpe
Sent: Tuesday, 25 October 2016 11:06 PM
To: gpfsug main discussion list <gpfsug-discuss at spectrumscale.org>
Subject: Re: [gpfsug-discuss] Forcing which node gets expelled?

Hi Bob,

That is exactly what I was after, thanks very much!  Should buy us a little time so we can resolve our networking issue.

Thanks again

Matt.



From: gpfsug-discuss-bounces at spectrumscale.org<mailto:gpfsug-discuss-bounces at spectrumscale.org> [mailto:gpfsug-discuss-bounces at spectrumscale.org] On Behalf Of Oesterlin, Robert
Sent: 25 October 2016 13:23
To: gpfsug main discussion list <gpfsug-discuss at spectrumscale.org<mailto:gpfsug-discuss at spectrumscale.org>>
Subject: Re: [gpfsug-discuss] Forcing which node gets expelled?

If you look at /usr/lpp/mmfs/samples/expelnode.sample you can use this as a base and install this in /var/mmfs/etc on the cluster manager. You can control which of the two nodes get expelled.

We use it here to send an alert when a node is expelled.

There is also "mmexpelnode" which you can force a particular node to be expelled.


Bob Oesterlin
Sr Principal Storage Engineer, Nuance


From: <gpfsug-discuss-bounces at spectrumscale.org<mailto:gpfsug-discuss-bounces at spectrumscale.org>> on behalf of Matt Thorpe <matt.thorpe at bodleian.ox.ac.uk<mailto:matt.thorpe at bodleian.ox.ac.uk>>
Reply-To: gpfsug main discussion list <gpfsug-discuss at spectrumscale.org<mailto:gpfsug-discuss at spectrumscale.org>>
Date: Tuesday, October 25, 2016 at 7:05 AM
To: gpfsug main discussion list <gpfsug-discuss at spectrumscale.org<mailto:gpfsug-discuss at spectrumscale.org>>
Subject: [EXTERNAL] [gpfsug-discuss] Forcing which node gets expelled?

Hi,

We are in the process of diagnosing a networking issue that is causing 2 of our 6 node GPFS cluster to expel each other (it appears they experience a temporary network connection outage and lose contact with each other).  At present it's not consistent which gets expelled by the cluster manager, and I wondered if there was any way to always force a specific node to be expelled in this situation?

Thanks and best regards,
Matt

--------
Matt Thorpe  |  BDLSS Systems Administrator
Bodleian Libraries Osney One Building, Osney Mead, Oxford, OX2 0EW
matt.thorpe at bodleian.ox.ac.uk<mailto:matt.thorpe at bodleian.ox.ac.uk>  |  01865 (2)80027
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