From: | Bruce Momjian <bruce(at)momjian(dot)us> |
---|---|
To: | Michael Paquier <michael(dot)paquier(at)gmail(dot)com> |
Cc: | Simon Riggs <simon(at)2ndquadrant(dot)com>, Claudio Freire <klaussfreire(at)gmail(dot)com>, Gabriele Bartolini <gabriele(dot)bartolini(at)2ndquadrant(dot)it>, desmodemone <desmodemone(at)gmail(dot)com>, Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, Marco Nenciarini <marco(dot)nenciarini(at)2ndquadrant(dot)it>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: Proposal: Incremental Backup |
Date: | 2014-08-06 02:16:00 |
Message-ID: | 20140806021600.GG13302@momjian.us |
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Lists: | pgsql-hackers |
On Wed, Aug 6, 2014 at 09:17:35AM +0900, Michael Paquier wrote:
> On Wed, Aug 6, 2014 at 9:04 AM, Simon Riggs <simon(at)2ndquadrant(dot)com> wrote:
> >
> > On 5 August 2014 22:38, Claudio Freire <klaussfreire(at)gmail(dot)com> wrote:
> > Thinking some more, there seems like this whole store-multiple-LSNs
> > thing is too much. We can still do block-level incrementals just by
> > using a single LSN as the reference point. We'd still need a complex
> > file format and a complex file reconstruction program, so I think that
> > is still "next release". We can call that INCREMENTAL BLOCK LEVEL.
>
> Yes, that's the approach taken by pg_rman for its block-level
> incremental backup. Btw, I don't think that the CPU cost to scan all
> the relation files added to the one to rebuild the backups is worth
> doing it on large instances. File-level backup would cover most of the
Well, if you scan the WAL files from the previous backup, that will tell
you what pages that need incremental backup.
I am thinking we need a wiki page to outline all these options.
--
Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://enterprisedb.com
+ Everyone has their own god. +
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