[gpfsug-discuss] How to clear stale entries in GUI log

[Laurence Horrocks-Barlow]

The Quorum buster node :P

-- Lauz


On 12/11/2016 20:39, Sobey, Richard A wrote:
> Sorry... one of the quorum nodes.
>
> -----Original Message-----
> From: gpfsug-discuss-bounces at spectrumscale.org [mailto:gpfsug-discuss-bounces at spectrumscale.org] On Behalf Of Valdis.Kletnieks at vt.edu
> Sent: 12 November 2016 20:24
> To: gpfsug main discussion list <gpfsug-discuss at spectrumscale.org>
> Subject: Re: [gpfsug-discuss] How to clear stale entries in GUI log
>
> On Fri, 11 Nov 2016 08:50:00 +0000, "Sobey, Richard A" said:
>> Question: when I upgrade to the new PTF when it???s available, can I
>> install it first on just the GUI node (which happens to be the Quorum
>> server for the
>> cluster)
> *the* quorum server, not "one of the quorum nodes"?
>
> Best practice is to have enough nodes designated as quorum nodes so even if one of them is taken down for upgrade or maintenance, the cluster as a whole remains up and serving data. That way, you can do rolling installs of patches without taking an outage.
>
> The number to pick depends on your config - we have one cluster with 4 NSD servers, where we've defined all 4 as quorum nodes.  That way, as long as 3 of them (half plus 1) are up, the cluster stays up.  We have another stretch cluster with 10 servers (5 at each node), and we defined 3 quorum nodes at our main site, and 2 at the remote site, specifically so that if we did lose the 10G link between sites, the main site would retain quorum and stay up.
> (Losing the remote site is, in our setup, *much* less critical than ensuring the main site stays up.  We replicate between the two, and if the remote is down, and thus falls behind, mmrestripefs is available for cleaning up)
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