From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
---|---|
To: | Simon Riggs <simon(at)2ndquadrant(dot)com> |
Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Klaus Naumann <kn(at)mgnet(dot)de>, markw(at)osdl(dot)org, pgsql-patches(at)postgresql(dot)org |
Subject: | Re: [HACKERS] Point in Time Recovery |
Date: | 2004-07-28 16:21:47 |
Message-ID: | 200407281621.i6SGLlD28030@candle.pha.pa.us |
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Thread: | |
Lists: | pgsql-admin pgsql-hackers pgsql-patches |
I do think we need a boolean for start/stop of archiving, rather than
setting it to '' to turn it off. Tom, I think the group agreed to this
on clarity grounds. I would like the server to throw an error if you
try to turn on archiving and the command is set to ''.
---------------------------------------------------------------------------
Simon Riggs wrote:
> On Wed, 2004-07-21 at 15:53, Tom Lane wrote:
> > Klaus Naumann <kn(at)mgnet(dot)de> writes:
> > > Simon doesn't mean the recovery part. Instead he means the "normal"
> > > startup of the server. It has to be absolutely clear (in the logfile!) if
> > > the server was started in archive mode or not. Otherwise you always have
> > > to guess.
> >
> > Why would you guess? "SHOW archive_command" will tell you, without
> > question, at any time. I don't see the point of placing such a message
> > in the postmaster log --- in normal circumstances the postmaster will
> > still be running long after its starting messages have been discarded
> > due to log rotation.
> >
> > Also, the current implementation allows you to stop and start archiving
> > on-the-fly, so a start-time message would be an unreliable guide to what
> > the postmaster is actually doing at the moment.
> >
>
> Overall, this is a small point and I think we should leave Tom alone, to
> focus on the bigger issues that we care about.
>
> Tom has done an amazingly good job in the last few days of refactoring
> some reasonably ugly code on my part, all without a murmur. I relent on
> this to allow everything to be finished in time.
>
> The PITR journey has just begun, so there will be further opportunity to
> discuss and agree what constitutes real issues and then correct them.
> This may not be on that list later.
>
> Best Regards, Simon Riggs
>
>
--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 359-1001
+ If your life is a hard drive, | 13 Roberts Road
+ Christ can be your backup. | Newtown Square, Pennsylvania 19073
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