On samedi 4 mars 2017 16:26:35 CET Rahkonen Jukka (MML) wrote: > Hi, > > I saw this changeset https://trac.osgeo.org/gdal/changeset/37594 and started > to think that how GDAL is reading SQLite db that is in WAL journal mode > from zip, tar, vsicurl or from non-writeble directory if it is documented > to be generally not possible http://www.sqlite.org/draft/wal.html?
The official page is at https://www.sqlite.org/wal.html "5. It is not possible to open read-only WAL databases. The opening process must have write privileges for "-shm" wal-index shared memory file associated with the database, if that file exists, or else write access on the directory containing the database file if the "-shm" file does not exist. " I'm trying to optimize the speed of ogrinfo -ro /vsitar/my.tar.gz/my.gpkg on very large files (but it turns out to be much more involved, since it requires system records to be contained at the beginning of the file) -- Spatialys - Geospatial professional services http://www.spatialys.com
_______________________________________________ gdal-dev mailing list [email protected] https://lists.osgeo.org/mailman/listinfo/gdal-dev
