[osg-users] [3rdparty] How to configure VPB to start compiling database at random tiles.

Robert Osfield robert.osfield at gmail.com
Fri Nov 27 01:23:56 PST 2009


Hi Torben,

I'm afraid at present there is no way to alter the order that
vpbmaster dispatches the tasks.  I doubt a random ordering will help,
but have a scheme were cache coherency and data locality would be an
interest advance.  Such a scheme is a non trivial enhancement though.

Robert.

On Thu, Nov 26, 2009 at 7:11 PM, Torben Dannhauer
<zonk at saguaro-fight-club.de> wrote:
> Hi,
>
> I compile a large Database (800GB terraindata) to a single database.
>
> so far it is compiling, but besides 2 processes, all other osgdem instances are more or less at idle, waiting for disk.
>
> My source data is spreaded above 4 Disks to lower the disk load an consist of the following directories with their content files:
> -North
> -South
> -East
> -West
> -HiRes-Inlay
> -DEM
>
> unfortunately VPB starts to render in the "south" section and assign worktasks from south to all cores - therefore my disk containtin "south" is under heavy load, and all other disks are at idle.
>
> Is it possible to configure VPB to start at random tiles, so some tasks are working on "north" data, some other at "HiRes" and so on?
> This way ALL disks would be under load and no osgdem instance would have to idle :)
>
> Thank you for your help.
>
> Torben
>
>
>
> Thank you!
>
> Cheers,
> Torben
>
> ------------------
> Read this topic online here:
> http://forum.openscenegraph.org/viewtopic.php?p=20456#20456
>
>
>
>
>
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