Horton

Re: Renaming of pg_xlog and pg_clog

Peter Eisentraut <peter.eisentraut@2ndquadrant.com>

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From: Peter Eisentraut <peter.eisentraut@2ndquadrant.com>
To: Jim Nasby <Jim.Nasby@BlueTreble.com>, Andres Freund <andres@anarazel.de>
Cc: Michael Paquier <michael.paquier@gmail.com>, PostgreSQL mailing lists <pgsql-hackers@postgresql.org>
Date: 2016-08-30T00:58:01Z
Lists: pgsql-hackers 
On 8/28/16 8:45 PM, Jim Nasby wrote:
> People accidentally blowing away pg_clog or pg_xlog is a pretty common 
> occurrence, and I don't think there's all that many tools that reference 
> them. I think it's well worth renaming them.

I think a related problem is that the default log directory is called
"pg_log", which is very similar to those other two.  There is no quick
way to tell their meaning apart.

I would consider changing the default from "pg_log" to "log".  Then we'd
also be at the point where we can say, everything starting with "pg_" is
internal, don't touch it.

-- 
Peter Eisentraut              http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services

Commits

  1. Rename "pg_clog" directory to "pg_xact".

  2. Improve error reporting in pg_upgrade's file copying/linking/rewriting.