Re: Remove Deprecated Exclusive Backup Mode

From: Andres Freund <andres(at)anarazel(dot)de>
To: Stephen Frost <sfrost(at)snowman(dot)net>
Cc: Peter Eisentraut <peter(dot)eisentraut(at)2ndquadrant(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, David Steele <david(at)pgmasters(dot)net>, Michael Paquier <michael(at)paquier(dot)xyz>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: Remove Deprecated Exclusive Backup Mode
Date: 2019-02-16 03:57:00
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On 2019-01-05 13:19:20 -0500, Stephen Frost wrote:
> Greetings,
> * Peter Eisentraut (peter(dot)eisentraut(at)2ndquadrant(dot)com) wrote:
> > On 12/12/2018 05:31, Robert Haas wrote:
> > > Most of the features I've been involved in removing have been
> > > deprecated for 5+ years. The first release where this one was
> > > deprecated was only 2 years ago. So it feels dramatically faster to
> > > me than what I think we have typically done.
> >
> > I was just looking this up as well, and I find it too fast. The
> > nonexclusive backups were introduced in 9.6. So I'd say that we could
> > remove the exclusive ones when 9.5 goes EOL. (That would mean this
> > patch could be submitted for PostgreSQL 13, since 9.5 will go out of
> > support around the time PG13 would be released.)
> I don't agree with either the notion that we have to wait 5 years in
> this case or that we've only had a good alternative to the exclusive
> backup mode since 9.5 as we've had pg_basebackup since 9.1.

I don't agree with a general 5 year deprecation window either. But it
seems pretty clear that there's no majority for removing exclusive
backups in v12. I think it'd be good to make the warning about its
impending death more explicit, but otherwise mark this CF entry either
as rejected or returned with feedback.


Andres Freund

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