[GRASS-dev] [GRASS GIS] #3801: r.watershed crashing on large rasters

[GRASS GIS]

#3801: r.watershed crashing on large rasters
----------------------+-------------------------
 Reporter:  dnewcomb  |      Owner:  grass-dev@…
     Type:  defect    |     Status:  new
 Priority:  normal    |  Milestone:  7.6.1
Component:  Default   |    Version:  7.4.1
 Keywords:            |        CPU:  x86-64
 Platform:  Linux     |
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 Attempting to run r.watershed on a 13.7 billion pixel raster elevation
 layer
  r.watershed --overwrite elevation=cfsdem05 accumulation=cfs_accum
 drainage=cfs_drain
 SECTION 1a (of 4): Initiating Memory.
 WARNING: Subprocess failed with exit code 11
 WARNING: category information for [cfs_accum] in [PERMANENT] missing or
          invalid
 WARNING: category information for [cfs_drain] in [PERMANENT] missing or
          invalid

 I have tried this with Memory=100000 MB

 Does r.watershed need more than 100GB of memory to run on a 14 billion
 pixel raster?

 The raster is linked via r.external, doe it need to be imported ?

 Looking backwards, the enhancement to run large raster was done for GRASS
 7.0 , is this a regression, or was it not tested to larger than 9 billion
 cells?

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Ticket URL: <https://trac.osgeo.org/grass/ticket/3801>
GRASS GIS <https://grass.osgeo.org>