Your cmd line specified that we are only to use the host "biggserver",
so all ranks will go there.
If you want ranks to go somewhere else, then you need to include that
location in your -host spec. See "man orte_hosts" for details.
On Jun 30, 2009, at 3:53 AM, Ashika Umanga Umagiliya wrote:
Hi all,
I have written mandelbrot rendering using X11.I have two nodes with
OpenMPI.
In my code, the rank 0 node(master) does the data collection from
salves, Window creation using X11 and render the graph.(using
XCreateSimpleWindow() ). Slave nodes calculate and send data to
master.
But when I execute my application by :
#mpirun -np 4 -host biggserver ./mandel
its gives error :
"cannot connect to X server '(null)'"
Isn't the rank 0 given to the machine which we initially run the MPI
application?
If so,why the application says it cannot connect to X server?Since
rank 0 is my workstation?
When I run this using a single node , it works well.
Any tips?
thanks in advance,
umanga
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