As far as I understand, GeoTools' support for shapefiles is singel
thread only. So if you are writing data into your shapefile, you may
experience problems.
On 28-04-12 15:07, André Matos wrote:
Hello everyone,
I am new to geotools.
I came here from geoserver, because I need to made a custom store that
calls a web service and reads a shapefile to draw the shapes. This
custom store will be installed in geoserver.
While reading the geoserver documentation, I found the following note:
"
Note
While GeoServer has robust support for the shapefile format, it is not
the recommended format of choice in a production environment.
Databases such as PostGIS are more suitable in production and offer
better performance and scalability. See the section on /Running in a
Production Environment/
<http://docs.geoserver.org/latest/en/user/production/index.html#production> for
more information.
" (http://docs.geoserver.org/latest/en/user/data/shapefile.html)
At a first glance this note seems to make sense to me. PostGIS will be
faster than reading a shapefile.... But, in my case must support
custom shapefiles, e.g. a user can upload a shapefile and then see the
a map image with the uploaded shapefile.
So, I made some tests. I created 2 layers with the *same data*:
- The first layer will load data from PostGIS (with indexes created
at geographic column)
- The second layer will load data from the shapefile.
The test conditions are the same for this two test cases. It's all on
the same computer (PostGIS database, Geoserver and the shapefile).
The result was unexpected. The second layer, reading a shapefile
directly was faster than reading data from PostGIS database, I read
the link "Running in a Production Environment" and found no
explanation for this...
Does anyone know why they discourage the use of shapefiles in a
production environment?
In my case, I just want to read the shapefile. I don't want to edit it...
Are they assuming that shapefile is not a good approach in a
production environment because you may want to edit the shapes? And
with PostGIS you have the ACID properties?
Thank you!
Best regards,
André Matos
PS: This question is about a geoserver documentation note. But, as
they are using geotools and it is related to geotools stores, I
decided to ask you first. If it is not geotools issue, just ignore it.
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