Robin,
this was an oversight of the implementation of gdal vector concat. Fixed
per https://github.com/OSGeo/gdal/pull/12856
Apart from using ogrmerge, a workaround is to increate the limit of open
files with "ulimit -n some_number"
Even
Le 04/08/2025 à 13:19, Robin Wilson via gdal-dev a écrit :
Hi,
I’ve just started experimenting with the new gdal command line tools.
I’ve tried the following command to merge a few thousand GeoJSON files
into one GeoPackage:
gdal vector concat --mode=single gb-postcodes-v5/units/*.geojson
all_unit_postcodes.gpkg
I get thousands of errors like:
ERROR 4: gb-postcodes-v5/units/KY4.geojson: Too many open files
Switching back to ogrmerge, I find that this command works fine:
ogrmerge -single -progress -o all_unit_postcodes_v2.gpkg
gb-postcodes-v5/units/*.geojson
Has there been a change which means that gdal vector concat tries to
open all the files in parallel, and then runs out of spare file
handles? Is there any way around this for the new gdal vector concat
command?
Best regards,
Robin
Dr Robin Wilson
www.rtwilson.com
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