[gdal-dev] FileGBD vs OpenFileGBD, a few of questions

[Andrea Aime]

On Mon, Feb 11, 2019 at 5:53 PM Even Rouault <even.rouault at spatialys.com>
wrote:

> What you can do (until OGR becomes smarter at a later point...) is:
> SetAttributeFilter("0 = 1")
> GetNextFeature()
>
> This will iterate over all the features and build the index.
>

Excellent


> >
> > Also, are DataSource objects thread safe, can one perform multiple reads
> in
> > parallel over them?
>
> No, an object should never be used by more than one thread at a time.
>

So each thread needs to build its own DataSource and associated in memory
spatial index,
and keep them alive for as possible in order to reuse the index?
Sorry for all these questions, trying to figure out if there is a way to
keep the index alive
long enough to be useful in an application like GeoServer, where each
thread serves one request
in a stateless manner. I'm guessing maybe one would have to setup some sort
of DataSource
pooling, not unlike a connection pool for databases.
Are there other file formats that would benefit from such a thing?

Cheers
Andrea

==

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