On Thu, 9 Sep 2010, Ulas Albayrak wrote:

> Hi,
>
> This might be a quite fundamental question, but the consequences of
> being wrong could be dire so I'll ratghr be sure: I need to upgrade
> Slony and the guide on the official Slony website says I should
> terminate all slon processes then install the newer version of Slony.
> My question is can I just build and install the newer version of Slony
> parallel to the old and after running the "update functions"-script,
> just delete the old slony files?

The version you are upgrading from/too controls the answer to this question. 
Perhaps the docs are less clear then they should be.

If you are upgrading from 1.2 to 2.0 you must uninstall slony with 
"uninstall node" on all nodes using the 1.2.x binaries then install the 2.0 
binaries and then re-build (init cluster, store node, subscribe set etc...) 
your cluster.

If your going from 2.0.3 to 2.0.4  or 1.2.x to 1.2.21 then you can use the 
update functions script.  Two versions of slony can't normally be installed 
at the same time under the same postgresql server directory since the slony 
install scripts normally put files in $postgresqldir/lib and share that 
would conflict.

In either case you should setup a test system with your old configuration 
and test your upgrade procedure.



>
> -- 
> Ulas Albayrak
> ulas.albayrak at gmail.com
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