Hi,
On 08/06/10 17:52, Felix Morsdorf wrote:
Dear all,
I am a happy (and thus mostly quite user) of OSG since a number of years but
now have run into a problem with VPB:
when generating a Pagedlod database with 10 subtiles regions, it will use the
eight cores of my mac pro and build these tiles correctly, but will then fail
to build the remaining two (which were scheduled to run when processors becomes
idle, as far as I understood).
Trying to resume the build with the --tasks option fails as well and in the
log files I find this:
0.017 : Adding terrainTile
0.067 : DataSet::_run() 0 0
0.068 : DataSet::assignDestinationCoordinateSystem() : assigning first
source file as the destination coordinate system
0.068 : started DataSet::createDestination(30)
0.068 : Time for after_reproject 0.000003
0.068 : DataSet::assignDestinationCoordinateSystem() : assigning first
source file as the destination coordinate system
0.069 : AR=2.857143 C1=3 R1=1
0.069 : createNewDestinationGraph
0.074 : Time for _destinationGraph->computeMaximumSourceResolution() =
0.000000
0.074 : Time for createDestinationGraph 0.005443
0.074 : Time for after_computeNeighbours 0.000009
0.074 : completed DataSet::createDestination(30)
0.074 : Error: no destination graph built, cannot proceed with build.
0.074 : Elapsed time = 0.074030
Any idea on what I might be doing wrong ?
Can you give some more info on:
+ the command line you used for vpbmaster
+ your input file sizes and projections
+ versions of OSG/VPB
And : is there a way of limit the number of cores that VBP uses ?
Have a look at the --machines option. You can create a file that will
run on local only with a given number of processes. I think there is an
example of this on the VPB wiki. Other option is to edit the source of
vpb :) Search for the message it prints out when finding the number of
cores.
cheers
jp
Using all eight cores on my machine with one disk does not seem to make sense,
since the single osgdem processes seem to hang quite often (Application not
responding). If that is an I/O limitation, I'd like to use only four cores.
Thank you for this wonderful tool!
Cheers,
Felix
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=28696#28696
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