[GRASS-user] v.clean process killed itselt!?

[Nikos Alexandris]

Attempting to clean a very big vector map (after patching and before
dissolving) ended without success. It's about all CORINE tiles to form
the European-wide land cover map.

The process was running for 2 days now and killed itself for reasons I
don't understand. The machine I currently work with has 4GB of RAM and
8GB of swap memory, not to mention the free hard disk space.

# the map is big!
GRASS 6.4.svn (corine):/geo/grassdb/europe/corine/PERMANENT/vector > ls
-lah corine

total 2.7G
drwxr-xr-x   2 nik nik   72 2009-01-06 09:59 .
drwxr-xr-x 715 nik nik  24K 2009-01-06 08:56 ..
-rw-r--r--   1 nik nik 109M 2009-01-06 10:01 cidx
-rw-r--r--   1 nik nik 1.9G 2009-01-06 10:01 coor
-rw-r--r--   1 nik nik   58 2009-01-06 10:01 dbln
-rw-r--r--   1 nik nik  191 2009-01-06 10:01 head
-rw-r--r--   1 nik nik  12K 2009-01-06 08:56 hist
-rw-r--r--   1 nik nik 647M 2009-01-06 09:59 topo

# cleaning...
GRASS 6.4.svn (corine):~ >  v.clean corine out=corine_clean
tool=snap,break,rmdupl thresh=.01

WARNING: 'vector/corine' was found in more mapsets (also found in
         <PERMANENT>)
WARNING: Using <corine at nik>
--------------------------------------------------
Tool: Threshold
Snap vertices: 1.000000e-02
Break: 0.000000e+00
Remove duplicates: 0.000000e+00
--------------------------------------------------
WARNING: 'vector/corine' was found in more mapsets (also found in
         <PERMANENT>)
WARNING: Using <corine at nik>
Copying vector lines...
WARNING: Table <corine_clean> already exists in database
         </geo/grassdb/europe/corine/nik/sqlite.db>
WARNING: Unable to copy table <corine_clean>
WARNING: Failed to copy attribute table to output map
Rebuilding parts of topology...
Building topology for vector map <corine_clean>...
Registering primitives...
7491252 primitives registered
122361691 vertices registered
Number of nodes: 5740813
Number of primitives: 7491252
Number of points: 0
Number of lines: 0
Number of boundaries: 5526642
Number of centroids: 1964610
Number of areas: -
Number of isles: -
--------------------------------------------------
Tool: Snap line to vertex in threshold
w
Killed
GRASS 6.4.svn (corine):~ > w
 00:02:58 up 2 days,  1:55,  2 users,  load average: 16.82, 10.29, 5.17
USER     TTY      FROM              LOGIN@   IDLE   JCPU   PCPU WHAT
nik      tty7     :0               Tue22    2days  1:43
0.64s /usr/bin/gnome-
nik      pts/0    :0.0             Tue22   27.00s  0.16s  0.00s w
GRASS 6.4.svn (corine):~ >

-The "w" was pressed by me accidentally. But I assume that it has little
to do with the process being killed.
-Additionally, I was watching from time to time the process's status via
"top".

What on earth killed this "important" process? How should on go about
and clean this map?

Thanks, Nikos