[GRASS-user] Running two instances of GRASS

GRASS GRASS user
1

Hi,

Simple and stupid question. Can I run two instances of GRASS on a
machine on DIFERENT location and mapset?

I've been running r.watershed for 3 days now and I need to do some
stuff on another grass location but I'm afraid to mess up the
r.watershed process

Thanks
Daniel

2

Yes, you can.

Any software that allows you to mess up its own running processes
by starting it twice should be ashamed of calling itself modular.
I think GRASS is an example of a modular software that works
very well.

Daniel Victoria wrote:

Hi,

Simple and stupid question. Can I run two instances of GRASS on a
machine on DIFERENT location and mapset?

I've been running r.watershed for 3 days now and I need to do some
stuff on another grass location but I'm afraid to mess up the
r.watershed process

Thanks
Daniel
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Archäoinformatik
(Archaeoinformation Science)
Institut für Ur- und Frühgeschichte
(Inst. of Prehistoric and Historic Archaeology)
Christian-Albrechts-Universität zu Kiel
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D 24098 Kiel
Germany

Tel.: ++49 (0)431 880-3378 / -3379
Fax : ++49 (0)431 880-7300
www.uni-kiel.de/ufg

3

Hello Daniel,

I had no problem with this.. even at the same location but different mapset..

but I did not try it with long term running processes...

Greetings
Manuel

Daniel Victoria schrieb:

Hi,

Simple and stupid question. Can I run two instances of GRASS on a
machine on DIFERENT location and mapset?

I've been running r.watershed for 3 days now and I need to do some
stuff on another grass location but I'm afraid to mess up the
r.watershed process

Thanks
Daniel
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grass-user@lists.osgeo.org
http://lists.osgeo.org/mailman/listinfo/grass-user

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_______________________________________________________________________
Dr. Manuel Seeger
Wiss. Assistent Scientific Assistant
Physische Geographie Dpt. of Physical Geography
FB VI - Geographie/Geowissenschaften Geography/Geosciences
Universität Trier University of Trier
D - 54286 Trier
Tel.: +49-651-201 4557
Fax: +49-651-201 3976
Web: http://www-neu.uni-trier.de/index.php?id=9607

4

Hi Daniel!

I use grass 6.2.3 and 6.3.svn at the same time on different
location and mapset (of course!).

Cheers,

Nikos.

On Thu, 10 Jan 2008 12:10:23 -0200
"Daniel Victoria" <daniel.victoria@gmail.com> wrote:

Hi,

Simple and stupid question. Can I run two instances of
GRASS on a
machine on DIFERENT location and mapset?

I've been running r.watershed for 3 days now and I need
to do some
stuff on another grass location but I'm afraid to mess up
the
r.watershed process

Thanks
Daniel
_______________________________________________
grass-user mailing list
grass-user@lists.osgeo.org
http://lists.osgeo.org/mailman/listinfo/grass-user

                        .
         Nikos Alexandris - Ph.D. Candidate
                        .
            Department of Remote Sensing
                       and
            Landscape Information Systems
                     (FeLIS)
                        .
      Faculty of Forestry and Natural Environment
          Albert-Ludwigs-University Freiburg
                        .
            Tel. +49 (0) 761 203 3697
            Fax. +49 (0) 761 203 3701
             Skype: Nikos.Alexandris
                        .
           Address: Tennenbacher str. 4
              D-79106 Freiburg i. Br.
                     Germany
                        .

5

Indeed,

you can use the same location but different mapset!

On Thu, 10 Jan 2008 15:18:19 +0100
nikos.alexandris@felis.uni-freiburg.de wrote:

Hi Daniel!

I use grass 6.2.3 and 6.3.svn at the same time on
different
location and mapset (of course!).

Cheers,

Nikos.

On Thu, 10 Jan 2008 12:10:23 -0200
"Daniel Victoria" <daniel.victoria@gmail.com> wrote:
> Hi,
>
> Simple and stupid question. Can I run two instances of
> GRASS on a
> machine on DIFERENT location and mapset?
>
> I've been running r.watershed for 3 days now and I need
> to do some
> stuff on another grass location but I'm afraid to mess
up
> the
> r.watershed process
>
> Thanks
> Daniel
> _______________________________________________
> grass-user mailing list
> grass-user@lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/grass-user

6

Benjamin Ducke <benjamin.ducke@ufg.uni-kiel.de> writes:

>> Simple and stupid question. Can I run two instances of GRASS on a
>> machine on DIFERENT location and mapset?

[...]

> Yes, you can. Any software that allows you to mess up its own
> running processes by starting it twice should be ashamed of calling
> itself modular. I think GRASS is an example of a modular software
> that works very well.

  BTW, it's one more reason to use WIND_OVERRIDE in one's modules
  to temporarily switch to another region.

7

Benjamin Ducke wrote:

> Simple and stupid question. Can I run two instances of GRASS on a
> machine on DIFERENT location and mapset?
>
> I've been running r.watershed for 3 days now and I need to do some
> stuff on another grass location but I'm afraid to mess up the
> r.watershed process

Yes, you can.

Any software that allows you to mess up its own running processes
by starting it twice should be ashamed of calling itself modular.
I think GRASS is an example of a modular software that works
very well.

OTOH, being able to run multiple GRASS sessions concurrently is a
fairly recent feature, and it took a while to get that working.

Even using different mapsets, you still need to take care with reading
from a mapset which is being modified by another session (i.e. don't
try to read files which the other session might be writing to).

--
Glynn Clements <glynn@gclements.plus.com>