Re: Streaming replication, and walsender during recovery

Heikki Linnakangas <heikki.linnakangas@enterprisedb.com>

From: Heikki Linnakangas <heikki.linnakangas@enterprisedb.com>
To: Simon Riggs <simon@2ndQuadrant.com>
Cc: Tom Lane <tgl@sss.pgh.pa.us>, Fujii Masao <masao.fujii@gmail.com>, PostgreSQL-development <pgsql-hackers@postgresql.org>
Date: 2010-01-28T18:49:21Z
Lists: pgsql-hackers
Simon Riggs wrote:
> I'm a little worried the feature set of streaming rep isn't any better
> than what we have already.

Huh? Are you thinking of the "Record-based Log Shipping" described in
the manual, using a program to poll pg_xlogfile_name_offset() in a tight
loop, as a replacement for streaming replication? First of all, that
requires a big chunk of custom development, so it's a bit of a stretch
to say we have it already. Secondly, with that method, the standby still
 still be replaying the WAL one file at a time, which makes a difference
with Hot Standby.

-- 
  Heikki Linnakangas
  EnterpriseDB   http://www.enterprisedb.com