[GRASS-user] v.vol.rst - not enough disk space to write temp file

[Francois Chartier]

Hi,

I checked the temp file that is saved during the v.vol.rst interpolation
process, and the file went up to over 50 GB and more until the space on my
laptop (free space of 100GB) was exausted.
So I copied all the grass data file onto an external hard drive with 1
Terabyte of space. started grass and browsed to the data that is saved on
the external hard drive.  when running vvolrst, the process also crashed
due to not enough space....
the memory situation is much better during the process.
for some reason it does not seem to increase the size of the temp file on
the hard drive...
see error message below.
(Sat Jan 12 17:28:02 2019)

v.vol.rst --overwrite input=Dec16CleanedJjan12 at Toronto wcolumn=dbl_2 dmin=1
elevation=dec16jan12
280957 records selected from table
WARNING: Some points outside of region -- will ignore...
Processing all selected output files will require 2134724556 bytes of disk
space for temp files
WARNING: There are points outside specified 2D/3D region--ignored 1 points
(total points: 280957)
WARNING: Points are more dense than specified 'DMIN'--ignored 158199 points
(remain 122758)
WARNING: Unable to create 'cross_output' raster map without 'cross_input'
raster map being specified
ERROR: Not enough disk space - cannot write temp files
(Sat Jan 12 17:54:14 2019) Command finished (26 min 12 sec)

below is the g.region -p3 printed, as you can see this is a large domain
and high resolution.

projection: 1 (UTM)
zone:       17
datum:      nad83
ellipsoid:  grs80
north:      4924870
south:      4784003
west:       585000
east:       679717
top:        453.00000000
bottom:     2.16080000
nsres:      50.00603479
nsres3:     5.00007099
ewres:      50.00897571
ewres3:     5.00010558
tbres:      0.999643458980044
rows:       2817
rows3:      28173
cols:       1894
cols3:      18943
depths:     451
cells:      5335398
cells3:     240690193689



Le jeu. 27 déc. 2018 à 07:24, Markus Neteler <neteler at osgeo.org> a écrit :

> On Thu, Dec 20, 2018 at 2:42 AM Francois Chartier
> <fra.chartier at gmail.com> wrote:
> > Hi,
> >
> > trying to run v.vol.rst with a larger dataset but using a smaller
> footprint for the interpolation, using the same domain than  my previous
> dataset.
> > The interpolation does not reach the end of the simulation as there is
> not enough disk space.  Any way around this?
>
> ... get more disk space :-)
>
> > (Wed Dec 19 20:24:48 2018)
> > v.vol.rst --overwrite input=GeomodDec16 at Toronto wcolumn=dbl_2
> tension=100 elevation=trialdec16
> > 280957 records selected from table
> > WARNING: Some points outside of region -- will ignore...
> > WARNING: Strip exists with insufficient data
> > Processing all selected output files will require 1830391004 bytes of
> disk space for temp files
> > WARNING: There are points outside specified 2D/3D region--ignored 222354
> points (total points: 280957)
> > WARNING: Points are more dense than specified 'DMIN'--ignored 1946
> points (remain 279011)
> > WARNING: Unable to create <(null)> raster map without cross_input raster
> map being specified
>
> (note: this <(null)> in that message I have fixed now but it is
> unrelated to the problem).
>
> > ERROR: Not enough disk space - cannot write temp files
>
> When running the command keep an eye on the disk space: perhaps it
> writes the temp files to a very small partition?
>
> > (Wed Dec 19 20:29:56 2018) Command finished (5 min 8 sec)
> >
> > g.region -3p  [i have set a number of rows and columns to 100 for each,
> and res3.value as 1 (not sure if this contradict the number of column and
> rows)
> > projection: 1 (UTM)
> > zone:       17
> > datum:      nad83
> > ellipsoid:  grs80
> > north:      4862000
> > south:      4846000
> > west:       609200
> > east:       651700
> > top:        250.00000000
> > bottom:     50.00000000
> > nsres:      160
> > nsres3:     0.11358232
> > ewres:      425
> > ewres3:     0.44870509
>
> nsres3 and ewres3 are not equal, is that intended?
>
> > tbres:      2
> > rows:       100
> > rows3:      140867
> > cols:       100
> > cols3:      94717
> > depths:     100
> > cells:      10000
> > cells3:     1334249963900
>
> This is a fairly large amount of voxels: 1.33425e+12
>
> Likely the need for much temp space stems from that.
>
> Markus
>
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