Cluster with Python: cannot connect node

[Giacomo]

I'm trying to connect my pc (master) to a node (raspberry) using dispy. I've wrote a question on stackoverflow, but no one replyed.

The question is here. If someone can help it will be appreciated. Thanks

Giacomo

[Giridhar Pemmasani]

You have created the cluster, but dispy may not have had the chance to setup rpi before stats are printed. Either issue a job, or put time.sleep before calling 'stats'.

Note that the computation, in this case "/bin/ls" from client is sent to each node to execute. This will work only if the binary program on client can run on each node.

[Giacomo]

Thanks for your reply.

I've added a time.sleep(10) before calling cluster.stats() but nothing changed.
I've also tried to submit job, than wait() and than print stats, but nothing: it locks after submit() I think because it can't reach the node.

My final program:

import dispy

cluster = dispy.JobCluster(
"/bin/ls",
nodes=["192.168.1.105"],
ip_addr="192.168.1.106"
)

cluster.submit()
cluster.wait()
cluster.stats()

Thanks,

Giacomo

[Giridhar Pemmasani]

Which version are you using? If not using latest (4.6.0), please try that.

Also make sure that both rpi and your pc are running same version of dispy. In fact, this may likely be the issue - incorrect nodes are simply ignored.

Try with debug enabled; i.e., start dispynode with dispynode.py -d and pass loglevel=logging.DEBUG to JobCluster.

[Giacomo]

Yeah, the problem was the not update version of dispy in both my pc and my raspberry.
Really thank you!

Giacomo