Le 01/09/2013 15:23, Atlaste nous fit lire :
> I'm just wondering... what is large and how can I influence where that file is
> saved? Say, if it's only a few GB, I can just as easily create a ramdisk (on the
> same or another server) and store it there to speed things up? Or should I think
> more in the line of half a TB?

Large (the criteria to use a temporary file instead of 100% ram) is
defined via the Max_Image_Buffer_Memory (+MI) parameter (default to 128,
number of megabytes, uncompressed floating points of 5 values, above
which a file is created)

So, for 38400x21600, you can force to stay in memory with either:
MI=0
or any MI > 15820

Beware, you need more than 16 Gigabytes of memory to avoid the
swap-deadland.

The file, when it exist, depends on the system:
* windows: GetTempPath(), extended with a povwin subdirectory if
possible (else raw value of GetTempPath() )
** GetTempPath checks in order : environment variables TMP, TEMP,
USERPROFILE, and the windows directory.

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