[GRASS-dev] r.series with file option - too many files open

[Paulo van Breugel]

On 1/15/18 4:39 PM, Markus Metz wrote:
>
>
> On Mon, Jan 15, 2018 at 4:12 PM, Paulo van Breugel 
> <p.vanbreugel at gmail.com <mailto:p.vanbreugel at gmail.com>> wrote:
> >
> > Hi devs,
> >
> > I am trying to run r.series with a large number of input maps 
> (5000). Given the large number of input maps, I am using the 'file' 
> option.
> >
> > GRASS 7.5.svn (latlon):~ > r.series output=speciescount method=sum 
> file=test.txt
> >
> > I get the warning:
> >
> > WARNING: G__open(read): Unable to open
> >
> >  '/home/paulo/Data/HASdata/latlon/redlist/cellhd/Eulemur_fulvus':
> >
> >          Too many open files
> >
> > ERROR: Error reading reclass file for raster map <Eulemur_fulvus>
> >
> > Eulemur_fulvus is the 511th file on the list. From the help file, I 
> thought that using the file option will prevent one from hitting open 
> files limit and the size limit of command line arguments. Am I 
> misunderstanding the r.series helpfile?
>
> the file option prevents too long command lines: instead of providing 
> hundreds of map names as input, only one file with the map names is 
> provided
>
> the manual is wrong:
> Use the /file/ option to analyze large amount of raster maps without 
> hitting open files limit and the size limit of command line arguments.
>
> must be
> Use the -z flag to analyze large amount of raster maps without hitting 
> open files limit and the /file/ option to avoid hitting the size limit 
> of command line arguments.


Ah, yes, I totally forgot about that flag. Thanks (also Anna and 
Veronica). Perhaps somebody with write permission can correct his in the 
manual page?


>
> Markus M
> >
> >
> >
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>
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