On 7 July 2016 at 21:10, Robert Haas <robertmh...@gmail.com> wrote:

> pg_upgrade does that, kinda.  I'd like to have something better, but
> in the absence of that, I think it's quite wrong to think about
> deprecating it, even if we had logical replication fully integrated
> into core today.  Which we by no means do.
>

I don't see any problem with extending pg_upgrade to use logical
replication features under the covers.

It seems very smooth to be able to just say

   pg_upgrade --online

and then specify whatever other parameters that requires.

It would be much easier to separate out that as a use-case so we can be
sure we get that in 10.0, even if nothing else lands.

-- 
Simon Riggs                http://www.2ndQuadrant.com/
<http://www.2ndquadrant.com/>
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services

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