[gpfsug-discuss] Filesystem descriptor discs for GNR

Jan-Frode Myklebust janfrode at tanso.net
Thu Mar 28 18:33:17 GMT 2019


There seems to be some changes or bug here.. But try usage=dataOnly
pool=neverused failureGroup=xx.. and it should have the same function as
long as you never place anything in this pool.


-jf
tor. 28. mar. 2019 kl. 18:43 skrev Luke Sudbery <L.R.Sudbery at bham.ac.uk>:

> 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.
>
>
> _______________________________________________
> gpfsug-discuss mailing list
> gpfsug-discuss at spectrumscale.org
> http://gpfsug.org/mailman/listinfo/gpfsug-discuss
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://gpfsug.org/pipermail/gpfsug-discuss_gpfsug.org/attachments/20190328/386ea421/attachment-0002.htm>


More information about the gpfsug-discuss mailing list