[gpfsug-discuss] Filesystem descriptor discs for GNR

Fri Mar 29 14:54:08 GMT 2019

Yes, this will be fixed in the next ESS release.

Steve Duersch
Spectrum Scale/ESS
IBM Poughkeepsie, New York

gpfsug-discuss-bounces at spectrumscale.org wrote on 03/28/2019 07:01:26 PM:

>
> Message: 4
> Date: Thu, 28 Mar 2019 23:01:24 +0000
> From: Luke Sudbery <L.R.Sudbery at bham.ac.uk>
> To: "scale at us.ibm.com" <scale at us.ibm.com>, gpfsug main discussion list
>    <gpfsug-discuss at spectrumscale.org>
> Subject: Re: [gpfsug-discuss] Filesystem descriptor discs for GNR
> Message-ID:
>    <DF8E9955CA48D949A5E04A33E950F66A0A8F83E4 at EX11.adf.bham.ac.uk>
> Content-Type: text/plain; charset="us-ascii"
>
> Thanks, that worked.
>
> Will this be addresses in a future update?
>
> Cheers,
>
> Luke
>
> --
> Luke Sudbery
> Architecture, Infrastructure and Systems
> Advanced Research Computing, IT Services
> Room 103, Computer Centre G5, Elms Road
>
> Please note I don't work on Monday and work from home on Friday.
>
> From: Truong Vu <truongv at us.ibm.com> On Behalf Of scale at us.ibm.com
> Sent: 28 March 2019 20:09
> To: gpfsug main discussion list <gpfsug-discuss at spectrumscale.org>;
> Luke Sudbery (IT Research Support) <L.R.Sudbery at bham.ac.uk>
> Subject: Re: [gpfsug-discuss] Filesystem descriptor discs for GNR
>
>
> This is a known issue. The workaround is to use --force-nsd-mismatch
> option. Just make sure that the failure group is different from
> those used by the vdisk NSDs
>
> Regards, The Spectrum Scale (GPFS) team
>
>
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> [Inactive hide details for Luke Sudbery ---03/28/2019 01:45:16 PM---
> We have a 2 site Lenovo DSS-G based filesystem, which with (]Luke
> Sudbery ---03/28/2019 01:45:16 PM---We have a 2 site Lenovo DSS-G
> based filesystem, which with (some of the data) replicated across the
>
> From: Luke Sudbery
<L.R.Sudbery at bham.ac.uk<mailto:L.R.Sudbery at bham.ac.uk>>
> To:
"gpfsug-discuss at spectrumscale.org<mailto:gpfsug-discuss at spectrumscale.org
> >"
<gpfsug-discuss at spectrumscale.org<mailto:gpfsug-discuss at spectrumscale.org>>
> Date: 03/28/2019 01:45 PM
> Subject: [gpfsug-discuss] Filesystem descriptor discs for GNR
> Sent by: gpfsug-discuss-bounces at spectrumscale.org<mailto:gpfsug-
> discuss-bounces at spectrumscale.org>
>
> ________________________________
>
>
>
> We have a 2 site Lenovo DSS-G based filesystem, which with (some of
> the data) replicated across the 2 sites. We'd like to a 3rd
> filesystem descriptor disk so we can lose one site and still have
> filesystem descriptor quorum. But this seems incompatible unless we
> make new vdisks - which we can't do on non native raid servers.
>
> We've added a new NSD which now has a free disc, but can't add that
> disk as descOnly.
>
> Adding the new descriptor disk to the system pool says:
>  mmadddisk: A storage pool may not contain both vdisk NSDs and non-vdisk
NSDs.
>
> Adding the new disk to a new system_desc pool says:
>  mmadddisk: Disk usage descOnly is incompatible with storage pool
system_desc.
>
> Tried adding config to specify the system_desc pool is for
> metadataOnly and it still says it's incompatible.
>
> There is no mention of descOnly disks here: https://www.ibm.com/
> support/knowledgecenter/en/SSFKCN_4.1.0/
> com.ibm.cluster.gpfs.v4r1.gpfs200.doc/bl1adv_planning.htm
>
> Is it possible add a non-vdisk descOnly NSD to a dss-g/GNR solution?
>
> Cheers,
>
> Luke
>
> --
> Luke Sudbery
> Architecture, Infrastructure and Systems
> Advanced Research Computing, IT Services
> Room 103, Computer Centre G5, Elms Road
>
> Please note I don't work on Monday and work from home on Friday.
>
>
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