Hello, I've got a cluster with 4 nodes under OSCAR.
I'm trying to run PVM using the whole cluster, but I've found some
problems.
1. If I run a PVM program using the sample script (pbs_script.pvm) in the
OSCAR package (using PBS), PVM only takes a node as a host, and don't use
the other nodes.
2. If I run first a PVM console and try to add manually a host, it says:
$ pvm
pvm> add node1.oscar.eng.shu.ac.uk
add node1.oscar.eng.shu.ac.uk
0 successful
HOST DTID
node1.oscar.eng.shu.ac.uk Can't start pvmd
Auto-Diagnosing Failed Hosts...
node1.oscar.eng.shu.ac.uk...
Verifying Local Path to "rsh"...
Error - File /usr/bin/rsh Not Found!
Use "whereis rsh" or "which rsh" to determine
where "rsh" is on your system and modify the
$PVM_ROOT/conf/$PVM_ARCH.def configuration file
to adjust the path for the -DRSHCOMMAND=\"\"
flag. Then recompile PVM and your applications.
Why this message if it's supossed that PVM uses ssh under OSCAR?
3. I've tried run PVM manually, with the daemon and an "input_file" like
this:
* ep=/home/engjfaa/my_oscar_test/hello
#this line doesn't exist.There's only a space between "hello" and "wd"
wd=/home/engjfaa/my_oscar_test/hello
node4.oscar.eng.shu.ac.uk
node3.oscar.eng.shu.ac.uk
node2.oscar.eng.shu.ac.uk
node1.oscar.eng.shu.ac.uk
and then I just type:
$ pvmd in_file &
but when I run the PVM program, it only uses the server or the node from
I'm running the program.
4. I've tried to add hosts using the dynamic configuration that PVM offers
with the "pvm_addhosts()" function. But it returns "0", that is, no host
added.
So, where is the problem?
When I'm running a PVM program, there is only one host and then OSCAR
distribute the job??
Why can't I use the nodes??
If someone can help me, please help me the sooner the better.
Thank you very much.
Jose Francisco Alvarez Aguilar
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