>
>
> **
>
> Is there a Hard Rule that the Slony versions must be 100% exact at all
> times, or can a Target Node be at a newer subversion ahead of the Master
> and still run.
>

AFAIK, Slony-I need exact version on both the node's.
Because upgrading a node to newer version will do changes to slony_func.so
file where it should match the version with the other replicating nodes
else it will break. Below link has a comment after the upgrade steps as " If
there is any mismatch between component versions, the
slon<http://main.slony.info/documentation/2.1/slon.html> will
refuse to start up, which provides protection against corruption."

http://main.slony.info/documentation/2.1/slonyupgrade.html

For your other questions, hopefully you will see some answer's here.

-- 
Regards
Raghav
Blog: htt://raghavt.blogspot.com/
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