Hi Luc,
Luc Claustres wrote:
J.P. Delport wrote:
"The vpbmaster command created 473 tasks and after 50 hours of
processing created 1.5 million files with a total size of 487GB."
The input data is around 800GB if I remember OK.
So the 60 days does sound a bit extreme.
In our case, VPB created about 130 000 tasks...
How many does it create if you do not specify the split (like you had on
the command line) explicitly?
J.P. Delport wrote:
Are you getting any messages
that vpb is transforming the coordinate system of your files?
If so you'd probably be better off doing this as a preprocess step using the gdal tools. I would e.g. convert the ECW's to Geotiff's in the final
projection that you use.
All our files are already in the final projection.
J.P. Delport wrote:
Also, you could try adding overviews to your input data, e.g.
gdaladdo my.tiff 2 4 8 16
It could speed up vpb's loading of the input data.
ECW naturally includes overview as it is a wavelets-based compression.
How much time does decompression take? Maybe an uncompressed format
would be faster, but I'm not sure.
J.P. Delport wrote:
You could also try add --compressed --npot to the vpb command line.
I cannot see the npot option details here
http://www.openscenegraph.org/projects/VirtualPlanetBuilder/wiki/CommandLineOptions,
what is it ?
It allows non-power-of-two (npot) images to be placed in the database.
This is fine for most modern cards that can use npot textures. This
could skip the scaling of images to power-of-two during build.
rgds
jp
Cheers, Luc
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=22499#22499
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