On 11-04-26 11:32 AM, Scott Marlowe wrote:
> On Mon, Apr 25, 2011 at 6:11 PM, Sam Choukri<sam at eventful.com>  wrote:
>> Hello,
>>
>> I am maintaining a pair of database servers on CentOS 5 running Posgtres 8.1.18 and Slony 1.2.22 (1 master to 1 slave). I would like to upgrade the database to Postgres 9.0, but I do not have the option of doing a standard drop and restore. Therefore, I'd like to use Slony to replicate from 8.1 to 9.0, then do a switchover.
>>
>> The release notes for Slony 1.2.22 says it added explicit support for Postgres 9.0 so I'm cautiously optimistic I can do it. But is it a good idea? Any gotchas I should be concerned about?
>
> It's how we upgraded from 8.1 to 8.3 smoothly a year or three ago.
> I'd recommend updating slony to the latest version.

1.2.22 is the latest version of Slony that will work for what he is 
doing (if a 1.2.23 is ever needed/released I would assume that would 
continue to work as well).

2.0 or higher requires at least PostgreSQL 8.3 or higher.  After he 
upgrades to 9.0 he could then upgrade to a more recent slony version.



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