Re: Trying to understand a failed upgrade in AWS RDS

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От Mike Lissner
Тема Re: Trying to understand a failed upgrade in AWS RDS
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Msg-id CAMp9=Ey06atDdY6a=Z93NsMETFpojNw7J+JnF-CxT9aTYgW4zg@mail.gmail.com
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Ответ на Re: Trying to understand a failed upgrade in AWS RDS  (Julien Rouhaud <rjuju123@gmail.com>)
Ответы Re: Trying to understand a failed upgrade in AWS RDS
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As far as I know it's impossible to reliably pg_upgrade a node that has subscriptions and eventually resume logical replication. 

Should this go in the documentation somewhere? Maybe in the pg_upgrade notes? I still don't understand the mechanism. You also say that:
 
It's possible to make it work with some efforts in some basic configurations and / or if no changes happen on the publications

But that kind of surprises me too, actually, because it seemed like pg_upgrade wiped out the LSN locations of the subcriber, making it start all over.

Upgrading a subscriber seems like something that could/should work, so it should be documented if pg_upgrade is incompatible with maintaining a subscription, shouldn't it?

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