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Re: [HACKERS] Incrementally Updated Backup

From: "Jim C(dot) Nasby" <jim(at)nasby(dot)net>
To: Simon Riggs <simon(at)2ndquadrant(dot)com>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, pgsql-hackers(at)postgresql(dot)org,Heikki Linnakangas <heikki(at)enterprisedb(dot)com>,pgsql-patches(at)postgresql(dot)org
Subject: Re: [HACKERS] Incrementally Updated Backup
Date: 2006-09-20 20:20:18
Message-ID: 20060920202017.GY28987@nasby.net (view raw or flat)
Thread:
Lists: pgsql-hackerspgsql-patches
On Wed, Sep 20, 2006 at 02:09:43PM +0100, Simon Riggs wrote:
> > But why in the world would you want to stop the slave to do it?  ISTM
> > we would want to arrange things so that you can copy the slave's files
> > while it continues replicating, just as with a standard base backup.
> 
> You can do that, of course, but my thinking was that people would regard
> the technique as "unsupported", so I added a quick flag as a prototype.

An advantage to being able to stop the server is that you could have one
server processing backups for multiple PostgreSQL clusters by going
through them 1 (or more likely, 2, 4, etc) at a time, essentially
providing N+1 capability.
-- 
Jim Nasby                                            jim(at)nasby(dot)net
EnterpriseDB      http://enterprisedb.com      512.569.9461 (cell)

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