[GRASS-user] sharing GRASS mapsets

[Laura Poggio]

Hi Stefan,
that helps a lot actually. The suggestion to subdivide the mapset is a good
one. But we also need a way to have more than one person (not all users)
able to manage everything. So probably  the GRASS_SKIP_MAPSET_OWNER_CHECK
is a good option if used carefully.

Thanks a lot

Laura

On Wed, 6 Feb 2019 at 14:47, Stefan Blumentrath <Stefan.Blumentrath at nina.no>
wrote:

> Hi Laura,
>
>
>
> There are several options.
>
>
>
> One option would be to subdivide “ENVIROMENTAL_COVARIATES” into e.g.
> topics.
>
> In my organisation (also environmental research) we organized mapsets with
> prefixes (g_ for mapsets of general interest, gt_ for time series, p_ for
> projects, u_ for users). Different users can take care of different topics
> (but everybody has to clean up his/her own mess).
>
> These mapsets can then easily added to the users search_path with
> g.mapsets (https://grass.osgeo.org/grass74/manuals/g.mapsets.html)…
>
>
>
> An advantage of splitting up ENVIROMENTAL_COVARIATES into smaller mapsets
> is that it is easier to move chunks of data (e.g. from central storage to
> compute units (laptop/server))…
>
>
>
> If your users are allowed to change file ownership, they could in
> principle take over “ENVIROMENTAL_COVARIATES”. However, an important
> point of the ownership check implemented in GRASS is to make sure that
> users do not shoot each others in the foot…
>
> That check can be overwritten with the GRASS_SKIP_MAPSET_OWNER_CHECK
> environment variable (see:
> https://grass.osgeo.org/grass74/manuals/variables.html)
>
>
>
> See also the related issue: https://trac.osgeo.org/grass/ticket/1829
>
>
>
> For both of the latter options there is a significant risk in a multi-user
> environment…
>
>
>
> Hope that helps a bit…
>
>
>
> Cheers
>
> Stefan
>
>
>
> *From:* grass-user <grass-user-bounces at lists.osgeo.org> *On Behalf Of *Laura
> Poggio
> *Sent:* onsdag 6. februar 2019 12:22
> *To:* GRASS user list <grass-user at lists.osgeo.org>
> *Subject:* [GRASS-user] sharing GRASS mapsets
>
>
>
> Dear all,
>
> we need to share a GRASS location and its mapsets across multiple users.
>
> We would like to have a structure similar to this:
>
> LOCATION:
>
>  PERMANENT
>
>  ENVIROMENTAL_COVARIATES
>
>  working_mapset_for_each_user
>
>
>
> It is clear in the documentation that a user can only write in a mapset
> that it owns.
>
> However we would need to have multiple users to be able to
> add/delete/modify files to the ENVIROMENTAL_COVARIATES mapset. Is this
> possible at all? any workaround that can be implemented?
>
>
>
> Thanks in advance
>
>
>
> Laura
>
>
>
>
>
>
>
>
>
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