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Re: Streaming replication, and walsender during recovery

From: Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com>
To: Simon Riggs <simon(at)2ndQuadrant(dot)com>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Fujii Masao <masao(dot)fujii(at)gmail(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Streaming replication, and walsender during recovery
Date: 2010-01-28 18:49:21
Message-ID: 4B61DC31.8020404@enterprisedb.com (view raw or flat)
Thread:
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

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