[Paraview] Re: Berk, help me plz

[Berk Geveci]

Correct. ParaView decides "automatically", it just needs some help :-)

On 7/10/05, wpfeng <wpfeng at 163.com> wrote:
> Wylie, Brian,
> 
>  Thank you very much.
>  And I have another question :)
> "1) The servers (renderservers) can either send images or geometry to the
> client. If you look under 'View... 3D View Properties' you will see a
> slider for Composite. If you move slider to zero megabytes you will
> either get images streaming down from the servers or you will get a
> crash. "
> -- You mean the user decides where the rendering process occurs by 
> setting the composite slider? 
> 
>  In the page 90 of The Paraview Guide (chapter 12 Parallel ParaView), 
> there are some words as follows，
> "ParaView has the option of using parallel rendering on the render server 
> or rendering directly on the client workstation. ParaView automatically
> chooses
> a rendering strategy to achieve the best rendering performance. Smaller
> models 
> are rendered on the client, and distributed rendering is used for larger
> models."
> -- so, I guess that ParaView's automatic choice is based on the user's
> decision by 
> setting the composite slider. If I move slider to 10 megabytes, the servers
> send images to the client when the polygonal representation is larger than
> 10M, 
> and send geometry when it is smaller than 10M. Right?
> 
> 
>  
> 
> ======= 2005-07-11 06:22:03 =======
> 
> 
> Well I'm not Berk but I may be able to help. :)
> 
> 1) The servers (renderservers) can either send images or geometry to the
> client. If you look under 'View... 3D View Properties' you will see a
> slider for Composite. If you move slider to zero megabytes you will
> either get images streaming down from the servers or you will get a
> crash. 
> 
> If you get a crash it means that you servers are not set up so that they
> can open up X windows. Note that this is a fairly common problem and you
> have to have your cluster admin (or yourself) change the X server
> security setting to allow you to do this.
> 
> 2) On the servers. The whole point is not to move the data, so wouldn't
> be useful anywhere else. :)
> 
> 3) Same answers for 1 and 2 but should be much faster when using
> compositing on big data. :)
> 
> 
> 
> Brian Wylie - Org 9227
> Sandia National Laboratories
> MS 0822 - Building 880/A1-J
> (505)844-2238 FAX(505)845-0833 
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>  Unleash the Beast
>  
> 
>  -----Original Message-----
>  From: paraview-bounces+bnwylie=sandia.gov at paraview.org 
>  [mailto:paraview-bounces+bnwylie=sandia.gov at paraview.org]
> On 
>  Behalf Of Panfeng Wang
>  Sent: Sunday, July 10, 2005 7:15 AM
>  To: paraview at paraview.org
>  Subject: [Paraview] Berk, help me plz
>  
>  Berk,
>  Given an environment as such:
>  a 4-nodes cluster server without graphics card and a 
>  client node with a graphics card,
>  paraview-2.0.1 runs in the client/server mode.
>  
>  My questions are :
>  1. what does the renderserver send to the client? 
>  pixel images for display? Or OpenGL control flows, then the 
>  client composites and translates them to pixel images and displays? 
>  2. paraview uses sort-last compositing algorithm, and 
>  where does the compositing process occur? on the 
>  renderservers or the client? 
>  3. If my environment changes and every server node has 
>  a graphics card, then what is the answer of question 1 and 2 ?
>  
>  
>  Thanks
>  
>  
>  Wang 
>  
>  
>  
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