[GRASS5] too many open raster files

GRASS GIS GRASS GIS developer
1

Hi,

I need to process about 500 maps at a time with r.series. I found in the ML,
that the defined MAXFILES variable in /lib/gis/G.h can be changed.

http://grass.itc.it/pipermail/grass5/1996-December/002287.html

For me it is working fine with MAXFILES 500, but are there any other problems,
that might occur?

regards,
   Otto

2

I need to process about 500 maps at a time with r.series. I found in
the ML, that the defined MAXFILES variable in /lib/gis/G.h can be
changed.

http://grass.itc.it/pipermail/grass5/1996-December/002287.html

For me it is working fine with MAXFILES 500, but are there any other
problems, that might occur?

raster/r.patch/nfiles.h says:
/* The number of cell files that can be patched together.
*
* All cell files will be opened at one time, so this number can not
* be arbitrarily large.
*
* Must be smaller than MAXFILES as defined in lib/gis/G.h which
* in turn must be smaller than the operating system's limit.
* (Given by `cat /proc/sys/fs/file-max` in Linux 2.4)
*/

I've worked with r.series with MAXFILES set to 400 (covering 365 days +
overhead) without any problem.

Search the mailing list for posts by Glynn containing "MAXFILES" for a
comprehensive answer. I'm sure he's explained this in the past.

Hamish