Horton

Re: Offline enabling/disabling of data checksums

Michael Banck <michael.banck@credativ.de>

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From: Michael Banck <michael.banck@credativ.de>
To: Magnus Hagander <magnus@hagander.net>
Cc: Sergei Kornilov <sk@zsrv.org>, Michael Paquier <michael@paquier.xyz>, Fabien COELHO <coelho@cri.ensmp.fr>, PostgreSQL Developers <pgsql-hackers@lists.postgresql.org>
Date: 2019-03-14T13:59:28Z
Lists: pgsql-hackers 
Hi,

Am Mittwoch, den 13.03.2019, 17:54 +0100 schrieb Magnus Hagander:
> On Wed, Mar 13, 2019 at 4:51 PM Michael Banck <michael.banck@credativ.de> wrote:
> > Am Mittwoch, den 13.03.2019, 12:43 +0100 schrieb Magnus Hagander:
> > > I think this is dangerous enough that it needs to be enforced and not
> > > documented.
> > 
> > Changing the cluster ID might have some other side-effects, I think
> > there are several cloud-native 3rd party solutions that use the cluster
> > ID as some kind of unique identifier for an instance. It might not be an
> > issue in practise, but then again, it might break other stuff down the
> > road.
> 
> Well, whatever we do they have to update, right? 

Yeah, but I am saying their orchestrators might get confused about where
the old instance went and what this new thing with a totally different
systemid is and lose the connection between the two. 

Maybe that is a feature and not a bug.


Michael

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Commits

  1. Reorganize Notes section in documentation of pg_checksums

  2. Add option -N/--no-sync to pg_checksums

  3. Add options to enable and disable checksums in pg_checksums

  4. Refactor more code logic to update the control file

  5. Rename pg_verify_checksums to pg_checksums

  6. Fix cross-version compatibility checks of pg_verify_checksums

  7. Add routine able to update the control file to src/common/