Hi! I am a student studying GRASS in Korea.
I would like to know the total number of lines of the source code.
Also, I would like to know if clustering for parallel processing is possible.
You’re help would be greatly appreciated!
Thanks!
Jerry
On Sat, Apr 15, 2000 at 09:30:55AM +0900, So Un Paik wrote:
Hi! I am a student studying GRASS in Korea.
I would like to know the total number of lines of the source code.
Hi,
last year I counted around 1.1 Million Lines of C. Now
it should be a bit more.
Also, I would like to know if clustering for parallel processing is possible.
No idea, I have only one CPU...
Markus Neteler
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Ok, I started a batch job to count this in 4.3 and 5.0.
Sure is bogging the server down. 
I'll let you know
Monday morning.
Bruce
Markus Neteler wrote:
On Sat, Apr 15, 2000 at 09:30:55AM +0900, So Un Paik wrote:
> Hi! I am a student studying GRASS in Korea.
> I would like to know the total number of lines of the source code.
Hi,last year I counted around 1.1 Million Lines of C. Now
it should be a bit more.> Also, I would like to know if clustering for parallel processing is possible.
No idea, I have only one CPU...Markus Neteler
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On Sat, 15 Apr 2000, Bruce Byars wrote:
Ok, I started a batch job to count this in 4.3 and 5.0. Sure is bogging
the server down.
I don't know off-hand what's required to make the code run as threads on
multiple processors. However, one of the premier compiler developers for
high-performance C and FORTRAN is located here in Portland: The Portland
Group. Since I know their sales manager -- and I know that their products
are used very heavily here in the Silicon Forest, I'll inquire.
I'm thinking of a beowulf cluster for running big GRASS models, so this is
of interest to me, too.
Rich
Dr. Richard B. Shepard, President
Applied Ecosystem Services, Inc. (TM)
Making environmentally-responsible mining happen. (SM)
--------------------------------
2404 SW 22nd Street | Troutdale, OR 97060-1247 | U.S.A.
+ 1 503-667-4517 (voice) | + 1 503-667-8863 (fax) | rshepard@appl-ecosys.com
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Thank you so much for your reply. I will be looking forward to hearing from you.
Best,
Jerry
----- Original Message -----
From: "Rich Shepard" <rshepard@appl-ecosys.com>
To: <grass5@geog.uni-hannover.de>
Sent: Sunday, April 16, 2000 12:57 PM
Subject: Re: [GRASS5] SOurce code and clustering
On Sat, 15 Apr 2000, Bruce Byars wrote:
> Ok, I started a batch job to count this in 4.3 and 5.0. Sure is bogging
> the server down.I don't know off-hand what's required to make the code run as threads on
multiple processors. However, one of the premier compiler developers for
high-performance C and FORTRAN is located here in Portland: The Portland
Group. Since I know their sales manager -- and I know that their products
are used very heavily here in the Silicon Forest, I'll inquire.I'm thinking of a beowulf cluster for running big GRASS models, so this is
of interest to me, too.Rich
Dr. Richard B. Shepard, President
Applied Ecosystem Services, Inc. (TM)
Making environmentally-responsible mining happen. (SM)
--------------------------------
2404 SW 22nd Street | Troutdale, OR 97060-1247 | U.S.A.
+ 1 503-667-4517 (voice) | + 1 503-667-8863 (fax) | rshepard@appl-ecosys.com----------------------------------------
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ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ!ü¨»§¶Ú.˱Êâmçë¢a$z÷¥¢ÔÞjh§µêçjYX§X¬·
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Thank you so much for your reply. If you have any more info, please get back to me.
Best,
Jerry
----- Original Message -----
From: "Bruce Byars" <Bruce_Byars@baylor.edu>
To: <grass5@geog.uni-hannover.de>
Sent: Sunday, April 16, 2000 11:29 AM
Subject: Re: [GRASS5] SOurce code and clustering
Ok, I started a batch job to count this in 4.3 and 5.0.
Sure is bogging the server down.
Monday morning.Bruce
Markus Neteler wrote:
> On Sat, Apr 15, 2000 at 09:30:55AM +0900, So Un Paik wrote:
> > Hi! I am a student studying GRASS in Korea.
> > I would like to know the total number of lines of the source code.
> Hi,
>
> last year I counted around 1.1 Million Lines of C. Now
> it should be a bit more.
>
> > Also, I would like to know if clustering for parallel processing is possible.
> No idea, I have only one CPU...
>
> Markus Neteler
>
> ----------------------------------------
> If you want to unsubscribe from GRASS Development
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> subject 'unsubscribe grass5'
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âµëhþh§¢·hàzÿºxÿ
©ç¢÷«ý×°Øl¹¸Þrßî˱Êâmè+jË9þW§Øÿß]|¬ÿ
Thanks! I hope you got my last reply.
Jerry
----- Original Message -----
From: "Markus Neteler" <neteler@geog.uni-hannover.de>
To: <grass5@geog.uni-hannover.de>
Sent: Saturday, April 15, 2000 6:04 PM
Subject: Re: [GRASS5] SOurce code and clustering
On Sat, Apr 15, 2000 at 09:30:55AM +0900, So Un Paik wrote:
> Hi! I am a student studying GRASS in Korea.
> I would like to know the total number of lines of the source code.
Hi,last year I counted around 1.1 Million Lines of C. Now
it should be a bit more.> Also, I would like to know if clustering for parallel processing is possible.
No idea, I have only one CPU...Markus Neteler
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âµëhþh§¢·hàzÿºxÿ
©ç¢÷«ý×°Øl¹¸Þrßî˱Êâmè+jË9þW§ØÿÛ:¬ÿ
On Sat, Apr 15, 2000 at 09:30:55AM +0900, So Un Paik wrote:
Also, I would like to know if clustering for parallel processing is possible.
GRASS is quite modular, but it is not designed to be run
on more than one processor as far as I know.
It would make sense for some modules to utilise more than one
process, but this is not completly trivial to do.
Bernhard
--
Professional Service around Free Software (intevation.net)
The FreeGIS Project (freegis.org)
Association for a Free Informational Infrastructure (ffii.org)
On Mon, 17 Apr 2000, Bernhard Reiter wrote:
It would make sense for some modules to utilise more than one process, but
this is not completly trivial to do.
Bernhard,
Local resources include the Oregon Graduate Institute (a private graduate
school in the middle of the Silicon Forest here) and The Portland Group (a
high-performace compiler developer), as well as interested individuals in
the local linux community. This is something I want to investigate because I
believe that it could be very useful in many simulation or modeling
situations.
Rich
Dr. Richard B. Shepard, President
Applied Ecosystem Services, Inc. (TM)
Making environmentally-responsible mining happen. (SM)
--------------------------------
2404 SW 22nd Street | Troutdale, OR 97060-1247 | U.S.A.
+ 1 503-667-4517 (voice) | + 1 503-667-8863 (fax) | rshepard@appl-ecosys.com
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Rich Shepard wrote:
On Mon, 17 Apr 2000, Bernhard Reiter wrote:
> It would make sense for some modules to utilise more than one process, but
> this is not completly trivial to do.Bernhard,
Local resources include the Oregon Graduate Institute (a private graduate
school in the middle of the Silicon Forest here) and The Portland Group (a
high-performace compiler developer), as well as interested individuals in
the local linux community. This is something I want to investigate because I
believe that it could be very useful in many simulation or modeling
situations.Rich
Hi,
as far as i remember a group from the university of heidelberg
investigated/evaluated this for grass4.x. But the link to the homepage
no longer exists (or i could'nt find it again). See the documentation in
grass4.3/src.alpha/doc_modules_heidelberg (in german!).
If i remember correct they found that it is not possible to run grass on
a multiprocessor system or cluster with reasonable effort. I have no
experience with that, but i think that it is very complicated as the
grass libraries have not been developed with this in mind. Think of map
calculations for raster maps: for some calculations you need the value
for the nth row to calculate the nth+1 row, which will produce
problems/overhead in a distributed enviroment.
I fear that even a multi-processor machine will spent most time waiting
for input/output or memory operations to complete, so that a faster bus
system (e. g. crossbar-architecture in SGIs big irons) will give better
performance than more CPUs.
Only some thoughts,
Andreas
--
Andreas Lange, 65187 Wiesbaden, Germany, Tel. +49 611 807850
Andreas.Lange@Rhein-Main.de, A.C.Lange@GMX.net
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