Hello Jung Lee,
-------- Original-Nachricht --------
> Datum: Mon, 15 Dec 2008 06:57:52 -0500
> Von: "Jung Lee" <jangh...@gmail.com>
> An: Opensg-users@lists.sourceforge.net
> Betreff: [Opensg-users] What is sent on network in a cluster?
> Hello great OpenSG users,
>
> I have two simple questions on data exchange in the cluster mode of
> OpenSG.
>
> Q1: When running an OpenSG application on a linux cluster, what data are
> exchanged between nodes in the cluster? are they graphics primitives,
> kind
> of message, thread data, parts of scenegraph or anything else?
OpenSG's cluster support is based on distributing the scenegraph to the nodes
(servers). It records all changes made to the Fields of FieldContainers and
transmits those over the network. So the usual setup is to have one node
(client) that runs the application, i.e. modifies the scenegraph, and distribute
the changes to the render servers. So the data sent over the network are
changelist entries and the binary content of modified Fields.
On the render servers it is often sufficient to run a very simple application
(for many cases the sample testClusterClient will do).
> Q2: Also, I was wondering how OpenSG processes several input events. For
> example, If a user gives a mouse event (through GLUT?) in a head
> workstation, how is it sent to each node in cluster?
OpenSG itself does not really deal with input, so itself does not distribute
this type of data. If your application (running on the client) receives input
and modifies the scene based on that, the render serves will get the modified
scene and render it.
Hope it helps,
Carsten
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