Hi,
since my office grassdata/ becomes huge, I wonder if I should
change to zlib compression.
>From the "variables.html" page I get (btw: no mention of this in
the r.compress manual!):
GRASS_INT_ZLIB
[libgis]
if the environment variable GRASS_INT_ZLIB exists, new compressed
rasters will be compressed using zlib instead of RLE compression. Such
rasters will have a compressed value of 2 in the cellhd file.
Obviously, decompression is controlled by the raster's compressed
value, not the environment variable.
I wonder what the performance penalty of zlib could be. Does
anyone have experience? An advantage of stronger compression
could be that the data traffic on NFS on a cluster becomes less...
Opinions welcome,
Markus
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