Re: Enabling Checksums

From: Bruce Momjian <bruce(at)momjian(dot)us>
To: Jim Nasby <jim(at)nasby(dot)net>
Cc: Greg Smith <greg(at)2ndQuadrant(dot)com>, Simon Riggs <simon(at)2ndQuadrant(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Andres Freund <andres(at)2ndquadrant(dot)com>, Ants Aasma <ants(at)cybertec(dot)at>, Heikki Linnakangas <hlinnakangas(at)vmware(dot)com>, Jeff Davis <pgsql(at)j-davis(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Enabling Checksums
Date: 2013-03-25 13:25:44
Message-ID: 20130325132544.GA17029@momjian.us
Views: Raw Message | Whole Thread | Download mbox | Resend email
Thread:
Lists: pgsql-hackers

On Fri, Mar 22, 2013 at 11:35:35PM -0500, Jim Nasby wrote:
> On 3/20/13 8:41 AM, Bruce Momjian wrote:
> >Also, if a users uses checksums in 9.3, could they initdb without
> >checksums in 9.4 and use pg_upgrade? As coded, the pg_controldata
> >checksum settings would not match and pg_upgrade would throw an
> >error, but it might be possible to allow this, i.e. you could go from
> >checksum to no checksum initdb clusters, but not from no checksum to
> >checksum. I am wondering if the patch should reflect this.
>
> If the docs don't warn about this, they should, but I don't think it's
> the responsibility of this patch to deal with that problem. The reason
> I don't believe this patch should deal with it is because that is a
> known, rather serious, limitation of pg_upgrade. It's something about
> pg_upgrade that just needs to be fixed, regardless of what patches
> might make the situation worse.

Huh? It wasn't a "serious limitation" of pg_upgrade until this patch.
What limitation does pg_upgrade have regardless of this patch?

--
Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://enterprisedb.com

+ It's impossible for everything to be true. +

In response to

Responses

Browse pgsql-hackers by date

  From Date Subject
Next Message Tom Lane 2013-03-25 13:27:40 Re: adding support for zero-attribute unique/etc keys
Previous Message Amit Kapila 2013-03-25 12:22:11 Re: Proposal for Allow postgresql.conf values to be changed via SQL [review]