[Paraview] Client server problems in running 3.2.1 on SVA
Moreland, Kenneth
kmorel at sandia.gov
Thu Jan 3 15:57:59 EST 2008
Shouldn't you be using -np 2 instead of -n2. I don't see where you
specified your MPI implementation, but I have never used -n# in liu of
-np #.
-Ken
________________________________
From: paraview-bounces+kmorel=sandia.gov at paraview.org
[mailto:paraview-bounces+kmorel=sandia.gov at paraview.org] On Behalf Of
Manjunath Sripadarao
Sent: Thursday, January 03, 2008 8:08 AM
To: paraview at paraview.org
Subject: Re: [Paraview] Client server problems in running 3.2.1 on SVA
Hi Ken,
Thanks for the clarification. I think a little more information is
needed as I am
running into some problem that I can't seem to resolve.
I am using 3 machines of my cluster all three are connected to 3
displays. I want
use 2 of them as multi-tile display with 2 tiles. I have the Paraview
GUI on the
third machine. All three have X servers running and are MPI enabled. So
here
is how I launch the jobs on the machines.
$ mpirun -n2 -hostlist "sva11 sva12" /bin/env DISPLAY=:0 pvserver -tdx=2
-tdy=1
and I launch the client
$ paraview
and then connect to sva11.
My servers.pvsc looks like
<Servers>
<Server name="builtin" resource="builtin:">
<ManualStartup/>
</Server>
<Server name="fw-sva10" resource="cs://sva10:11111">
<ManualStartup/>
</Server>
<Server name="fw-sva11" resource="cs://sva11:11111">
<ManualStartup/>
</Server>
<Server name="fw-sva12" resource="cs://sva12:11111">
<ManualStartup/>
</Server>
<Server>
But the window multi-tile window appears only on sva11 and it doesn't
span the whole screen (which it used to do previously). And it doesn't
seem
like sva12 is even doing anything. I suspect this because sva11 flickers
when the client connects, but sva12 remains as it is.
If I do the reverse and connect the client to sva12, then model window
appears
on sva12 and sva11 seems to do nothing.
Is there anything I am missing ?
I am using Paraview 3.2.1.
Thanks,
Manju
What you are trying to do does not work because ParaView is not supposed
to run like that. When running in client/server mode, ParaView connects
to process 0 of the server, and nothing else. All communication with the
client goes through process 0, and process 0 of the server uses the MPI
interconnect to pass data to and from the other nodes in the server.
ParaView is implemented in this way for convenience and scalability. It
is not scalable to have every process in the server to connect to the
client because all communication will eventually have to go through the
same network interface on the client side. Also, the MPI interconnect on
the server is almost always faster than the socket communication between
client and server.
-Ken
> -----Original Message-----
> From: Manjunath Sripadarao [mailto: manjunaths at gmail.com]
> Sent: Tuesday, December 18, 2007 11:05 PM
> To: Moreland, Kenneth
> Subject: Re: [Paraview] Client server problems in running 3.2.1 on SVA
>
> Hi Kenneth,
> Thanks for the reply.
>
> > Problem 1: Do not use mpirun with the paraview executable. The
ParaView
> > client is a serial application and should not be launched with
mpirun.
>
> Ah...ok. I did launch paraview with using mpirun.
>
> > Problem 2: Only launch the server with one mpirun command. Use the
-np
> > argument to mpirun to specify how many processes you want the server
to
> > run in (in your case, probably 2). If your MPI environment it set
up
> > right, mpirun will automatically launch it on n2 and n3. If not,
either
> > change your MPI configuration or provide a machines file to mpirun
to
> > specify on which hosts to run on. The instructions for doing that
vary
> > based on MPI implementations and installations. Talk to your system
> > administrators for more information.
>
> I did this too, I am using a machines file for this (which we call an
app
> file
> but all the same). But how do you get the client to "listen" to 2 or
> more servers ?
> Even though I start 2 or 3 servers, if I can't get the client to
listen
> to multiple servers then it won't connect to all of them. If I use the
> -s option multiple times it only connects to the last one i.e.,
> if I give
> $ paraview -s=n2 -s=n3
> only n3 pvserver gets connected and n2 pvserver quits.
>
> If I write a servers.pvsc file with a list of servers, how do I get
> paraview pick the file automatically and connect to all the servers ?
>
> Thanks in advance,
> Manju
>
> > -Ken
> >
> >
> > > -----Original Message-----
> > > From: paraview-bounces+kmorel=sandia.gov at paraview.org
> > [mailto: paraview-
> > > bounces+kmorel=sandia.gov at paraview.org] On Behalf Of Manjunath
> > Sripadarao
> > > Sent: Monday, December 17, 2007 11:00 PM
> > > To: paraview at paraview.org
> > > Subject: [Paraview] Client server problems in running 3.2.1 on SVA
> > >
> > > Hello,
> > > I am trying to run Paraview 3.2.1 in client server mode. So here
is
> > > my setup, I have a cluster
> > > of workstations n[1-3]. I launch the client on n1 and reverse
connect
> > > to my servers on n2 and n3.
> > > I am running the client like this
> > > $[n1] mpirun <...other MPI options...> paraview -s=n2 -s=n3
> > > and server like this
> > > $[n2] mpirun <...other MPI options...> pvserver -rc
--client-host=n1
> > > -tdx=2 -tdy=1
> > > and
> > > $[n3] mpirun <...other MPI options...> pvserver -rc
--client-host=n1
> > > -tdx=2 -tdy=1
> > > but paraview connects only to n3 but not to n2.
> > > I figured out from the list and corresponding with Weiguang that
by
> > > creating a
> > > servers.pvsc file in .config/ParaView/servers.pvsc and adding
> > > <Servers>
> > > <Server name="builtin" resource="builtin:">
> > > <ManualStartup/>
> > > </Server>
> > > <Server name="n2" resource="csrc://n2:11111">
> > > <ManualStartup/>
> > > </Server>
> > > <Server name="n3" resource="csrc://n3:11111">
> > > <ManualStartup/>
> > > </Server>
> > > </Servers>
> > >
> > > I can't get the client to connect, when I remove the
> > > --server=<nodename> line on the client, it does not
> > > read the above file and does not connect. I have to manually say
> > > file->connect and connect to a selected
> > > server, but once I connect to one of them, it drops the connection
> > > another server. Has the ability to
> > > connect to multiple servers been disabled in 3.2.1 ?
> > > I want to run one client and multiple servers to have a
multi-tiled
> > > display.
> > >
> > > Regards,
> > > Manju
> > > _______________________________________________
> > > ParaView mailing list
> > > ParaView at paraview.org
> > > http://www.paraview.org/mailman/listinfo/paraview
> >
> >
> >
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