[Beowulf] Re: probs with mpdboot for 4 nodes
fabrice.pardo at lpn.cnrs.fr
Tue Dec 14 07:02:30 PST 2004
Your problem comes from the fact that "beomaster" initiate only 2 ssh
the lchild one and the rchild one, to beoslave and beoslave1 nodes.
The subsequent connections are initiated in the same left-right childs
from one of these slaves.
Then you need to be able to do a ssh from beoslave to beoslave2
or from beoslave1 to beoslave2 without password.
A way is to suppress your passphrase.
beomaster$ ssh-keygen -p
(empty for no passphrase)
Warning, your secret key .ssh/id_Xsa is now unencrypted.
beomaster$ ssh beoslave
beslave$ ssh beolslave2
beomaster$ ssh beoslave1
beslave1$ ssh beolslave2
This is not documented in mpich2-1.0/README, but the --debug
listing is a little bit more explicit (the name of the ssh initiator is
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