Re: WAL format and API changes (9.5)

From: Andres Freund <andres(at)2ndquadrant(dot)com>
To: Heikki Linnakangas <hlinnakangas(at)vmware(dot)com>
Cc: Michael Paquier <michael(dot)paquier(at)gmail(dot)com>, Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Subject: Re: WAL format and API changes (9.5)
Date: 2014-11-05 09:30:19
Message-ID: 20141105093019.GT28295@alap3.anarazel.de
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On 2014-11-04 18:33:34 +0200, Heikki Linnakangas wrote:
> On 10/30/2014 06:02 PM, Andres Freund wrote:
> >On 2014-10-29 10:24:20 +0200, Heikki Linnakangas wrote:
> >>On 10/06/2014 02:29 PM, Andres Freund wrote:
> >>>I've not yet really looked,
> >>>but on a quick readthrough XLogInsertRecData() staying in xlog.c doesn't
> >>>make me happy...
> >>
> >>Ok.. Can you elaborate?
> >
> >To me the split between xloginsert.c doing some of the record assembly,
> >and xlog.c doing the lower level part of the assembly is just wrong.
>
> I moved the checks for bootstrap mode and xl_len == 0, from the current
> XLogInsert to the new XLogInsert() function. I don't imagine that to be
> enough address your feelings about the split between xlog.c and
> xloginsert.c, but makes it a tiny bit clearer IMHO. I don't know what else
> to do about it, as it feels very sensible to me as it is now. So unless you
> object more loudly, I'm going to just go ahead with this and commit,
> probably tomorrow.

I'm still not particularly happy with the split. But I think this patch
is enough of a win anyhow. So go ahead.

Greetings,

Andres Freund

--
Andres Freund http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services

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