[gdal-dev] Understanding VSI caching

[Andrea Aime]

On Mon, Apr 9, 2018 at 8:58 PM, Even Rouault <even.rouault at spatialys.com>
wrote:

> Which disk caching are you refering too ? There's some disk caching for the
> WMS driver, but that's all
>
>
"In addition, a global least-recently-used cache of 16 MB shared among all
downloaded content is enabled by default, and content in it may be reused
after a file handle has been closed and reopen. Starting with GDAL 2.3, the
size of this global LRU cache can be modified by setting the configuration
option CPL_VSIL_CURL_CACHE_SIZE (in bytes)."

and I see in the code:

https://github.com/OSGeo/gdal/blob/master/gdal/port/cpl_vsil_curl.cpp#L203

(btw, there is no path, does it mean the file is created in the current
directory?)



> (well there's some provisional code for disk caching in /vsicurl/ but it is
> not compiled by default, and probably broken. There was some discussion
> recently on the ML about this if I remember well)
>

I'll check the archives.

Cheers
Andrea

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