Re: tracking commit timestamps

From: Robert Haas <robertmhaas(at)gmail(dot)com>
To: Simon Riggs <simon(at)2ndquadrant(dot)com>
Cc: Steve Singer <steve(at)ssinger(dot)info>, Petr Jelinek <petr(at)2ndquadrant(dot)com>, Andres Freund <andres(at)2ndquadrant(dot)com>, Jim Nasby <Jim(dot)Nasby(at)bluetreble(dot)com>, Michael Paquier <michael(dot)paquier(at)gmail(dot)com>, Anssi Kääriäinen <anssi(dot)kaariainen(at)thl(dot)fi>, Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>, Heikki Linnakangas <hlinnakangas(at)vmware(dot)com>, Pg Hackers <pgsql-hackers(at)postgresql(dot)org>, Jaime Casanova <jaime(at)2ndquadrant(dot)com>
Subject: Re: tracking commit timestamps
Date: 2014-11-13 21:24:52
Message-ID: CA+TgmoYiiivA4kZoXAszKz4QLtSBDyBkoWCRvaAJY0JS94apKw@mail.gmail.com
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On Thu, Nov 13, 2014 at 8:18 AM, Simon Riggs <simon(at)2ndquadrant(dot)com> wrote:
> Ordering transactions in LSN order is very precisly the remit of the
> existing logical decoding API. Any user that wishes to see a commits
> in sequence can do so using that API. BDR already does this, as do
> other users of the decoding API. So Slony already has access to a
> useful ordering if it wishes it. We do not need to anything *on this
> patch* to enable LSNs for Slony or anyone else. I don't see any reason
> to provide the same facility twice, in two different ways.

Perhaps you could respond more specifically to concerns expressed
upthread, like:

http://www.postgresql.org/message-id/BLU436-SMTP28B68B9312CBE5D9125441DC870@phx.gbl

I don't see that as a dumb argument on the face of it.

--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company

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