[Gdal-dev] max number of simplesources in vrt rasterband?

[Vincent Schut]

On Tuesday 03 February 2004 18:28, Frank Warmerdam wrote:
> Vincent Schut wrote:
> > Folks,
> >
> > I have a vrt file with approx. 1800 simplesource items (SRTM tiles). Gdal
> > always gives an error (with gdalinfo, gdal_translate, ...) for the 1020th
> > file in the vrt file. If I try to open this individual raster file with
> > gdal, everything goes fine. If I change the order of the simplesources,
> > the error still comes at the 1020th simplesource (which is another raster
> > file then) So I suspect there is a maximum at the number of simplesources
> > that can be defined in one vrt file?
> > If so, is it possible to enlarge this number?
>
> Vincent,
>
> The limit is on the number of open files on your system I would imagine.
> Depending on what operating system you are working on you may be able to
> increase the limit.  But the underlying solution would be to have the VRT
> code know to only open necessary datasets to satisfy a request, or perhaps
> to close and open datasets as needed to keep under some provided file
> handle limit.  I don't see that happening immediately though.
>
> Best regards,

Frank,

indeed, the obvious solution was `ulimit -n <many more than 1024>` ... :-)
Works like a charm now!

Thanks,
Vincent.