[GRASS-user] r.terraflow

[Francesco Mirabella]

Hi Markus and Hamish,
thanks for your message, this is the system I am on:

System->	Debian
Kernel->	 2.6.26.2
Ram->		 2.0 Gb
Clock-> 	Intel Pentium D 945 / 3.4 GHz 32/64 bit ( Dual-Core )
Free disk space-> 20 Gb on /

I tried increasing the memory to 1.6 Gb (about 80% of RAM) but I get the 
same error (below)

Can you tell how to use the .diff? Sorry but I am not familiar with them 
.... I'll be happy to test it and report what happens

Francesco

This is the output using 1.6Gb of memory
============================================================
GRASS 6.4.0RC5 (WGS84_UTM33):~ > r.terraflow elevation=copia.dem 
filled=flood direction=flow swatershed=sink accumulation=accumulation 
tci=tci d8cut=infinity memory=1600 STREAM_DIR=/tmp stats=stats.out
STREAM temporary files in /tmp  (THESE INTERMEDIATE STREAMS WILL NOT BE 
DELETED IN CASE OF ABNORMAL TERMINATION OF THE PROGRAM. TO SAVE SPACE 
PLEASE DELETE THESE FILES MANUALLY!)
file stats.out exists - renaming.
MFD flow direction
D8CUT=999999986991104.000000
Memory size: 1.56G (1677721600) bytes
Memory manager registering memory in MM_IGNORE_MEMORY_EXCEEDED mode.
total elements=67071935, nodata elements=8624611
largest temporary files:
FILL: 3.50G (3756028360) [67071935 elements, 56B each]
FLOW: 4.35G (4675785920) [58447324 elements, 80B each]
Will need at least 8.71G (9351571840) space available in /tmp
------------------------------
COMPUTING FLOW DIRECTIONS
classifying nodata (inner & boundary)
file=/tmp/STREAM_H2x7Lf:cannot read!: Bad address
r.terraflow: 
/usr/local/svn/grass/grass640_rc5/dist.i686-pc-linux-gnu/include/grass/iostream/ami_sort_impl.h:91: 
size_t makeRun_Block(AMI_STREAM<T>*, T*, unsigned int, Compare*) [with T 
= nodataType, Compare = labelCmpNodataType]: Assertion `err == 
AMI_ERROR_NO_ERROR || err == AMI_ERROR_END_OF_STREAM' failed.
Abortito
============================================================




Hamish wrote:
>> Francesco wrote:
>> ----------------------------
>> GRASS 6.4.0RC5 (WGS84_UTM33):~ > r.terraflow elevation=copia.dem
>>> filled=flood direction=flow swatershed=sink
>> accumulation=accumulation
>> tci=tci d8cut=infinity memory=300 STREAM_DIR=/tmp stats=stats.out
> 
> can you set memory= to something higher? (say 80% of physical RAM)
> 
>> Memory size: 300.00M (314572800) bytes
>> Memory manager registering memory in MM_IGNORE_MEMORY_EXCEEDED mode.
>> total elements=67071935, nodata elements=8624611
>> largest temporary files:
>> FILL: 3.50G (3756028360) [67071935 elements, 56B each]
>> FLOW: 4.35G (4675785920) [58447324 elements, 80B each]
>> Will need at least 8.71G (9351571840) space available in /tmp
> 
> are you using a true 64bit OS?
> 
>> EMPQUEUEADAPTIVE: starting in-memory pqueue
>> EMPQUEUEADAPTIVE: available memory: 297.929MB
>> EMPQUEUEADAPTIVE: desired memory: 297.929MB
>> sz_stream: 270388 buf_arity: 200 mm_overhead: 8665728
>> mm_avail: 312400802.
>> EMPQUEUEADAPTIVE: memory overhead set to 8.26428MB
>> EMPQUEUEADAPTIVE: pqsize set to 37966884
>> assigning preliminary directions
>> finding flat areas (plateaus and depressions)
>> file=/tmp/STREAM_rSqNkF:cannot read!: Bad address
>> r.terraflow:
>>
>> /usr/local/svn/grass/grass640_rc5/dist.i686-pc-linux-gnu/include/grass/iostream/ami_sort_impl.h:91:
>> size_t makeRun_Block(AMI_STREAM<T>*, T*,
>> unsigned int, Compare*) [with T =
>> plateauType, Compare = ijCmpPlateauType]: Assertion `err ==
>> AMI_ERROR_NO_ERROR || err == AMI_ERROR_END_OF_STREAM' failed.
>> Abortito
> 
> 
> (can't make a 8gig file on a 32bit OS/filesystem)
> 
> 
> Hamish
> 
> 
> 
>