Re: graphic dump on cluster

["Aron Ahmadia" <aja2111@xxxxxxxxxxxx>]

Is there a good script lying around somewhere for setting the X11 connections up from the master/interactive node?  This seems like it could be a huge pain if you've got a bunch of worker nodes sitting in a private network behind the master in classic Beowulf style and you don't have a systems administrator to set it up for you.

~A

On 1/24/07, Barry Smith <bsmith@xxxxxxxxxxx> wrote:

  Note that the PETSc X model has ALL nodes connect to the X server (not
just where rank == 0). Thus all of them need
1) the correct display value (-display mymachine:0.0 is usually the best way to
    provide it)
2) permission to access the display (X permission stuff, read up on it) and
3) a route to the X server (via TCP/IP).

  Barry


On Wed, 24 Jan 2007, Matthew Knepley wrote:

> On 1/24/07, js2615@xxxxxxxxxxxx <js2615@xxxxxxxxxxxx> wrote:
> > Hi Petsc experts,
> >
> > I have a question about the graphic output using multiple
> > processors.  Suppose I am using X11 to ssh into the cluster, and
> > would like to view the graphical output at each iteration using
> >
> > ierr = VecView(x,PETSC_VIEWER_DRAW_WORLD);CHKERRQ(ierr);
> >
> > I got the following error message, turns out, when I use multiple
> > processors (not a problem using one processor though):
> >
> > Unable to open display on localhost:10.0
> > .  Make sure your COMPUTE NODES are authorized to connect
> >     to this X server and either your DISPLAY variable
> >     is set or you use the -display name option
>
>  The error message is exactly right. You either need to set the DISPLAY env
> var or give the -display option to PETSc. I think giving -Y to ssh forwards
> your
> Xconnection automatically (setting DISPLAY).
>
>  Matt
>
>