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From: Heikki Linnakangas <[email protected]>
To: Tom Lane <[email protected]>
Cc: Fujii Masao <[email protected]>
Cc: Simon Riggs <[email protected]>
Cc: Aidan Van Dyk <[email protected]>
Cc: PostgreSQL-development <[email protected]>
Subject: Re: Re: [COMMITTERS] pgsql: Make standby server continuously retry restoring the next WAL
Date: Thu, 25 Mar 2010 10:11:45 +0200
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>
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Tom Lane wrote:
> Fujii Masao <[email protected]> writes:
>> OK. How about making the startup process emit WARNING, stop WAL replay and
>> wait for the presence of trigger file, when an invalid record is found?
>> Which keeps the server up for readonly queries. And if the trigger file is
>> found, I think that the startup process should emit a FATAL, i.e., the
>> server should exit immediately, to prevent the server from becoming the
>> primary in a half-finished state. Also to allow such a halfway failover,
>> we should provide fast failover mode as pg_standby does?
> 
> I find it extremely scary to read this sort of blue-sky design
> discussion going on now, two months after we were supposedly
> feature-frozen for 9.0.  We need to be looking for the *rock bottom
> minimum* amount of work to do to get 9.0 out the door in a usable
> state; not what would be nice to have later on.

Agreed, this is getting complicated. I'm already worried about the
amount of changes needed to make it work, I don't want to add any new
modes. PANIC seems like the appropriate solution for now.

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

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