Horton

Re: pg_ctl failover Re: Latches, signals, and waiting

Tatsuo Ishii <ishii@postgresql.org>

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From: Tatsuo Ishii <ishii@postgresql.org>
To: magnus@hagander.net
Cc: masao.fujii@gmail.com, heikki.linnakangas@enterprisedb.com, itagaki.takahiro@gmail.com, tgl@sss.pgh.pa.us, pgsql-hackers@postgresql.org
Date: 2011-01-28T16:11:32Z
Lists: pgsql-hackers

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  1. Remove rare corner case for data loss when triggering standby server.

>>>> I did s/failover/promote. Here is the updated patch.
>>>
>>> I rebased the patch to current git master.
>>
>> I'm thinking about implementing a function which does a promotion for
>> the standby. It will make pgpool lot easier to control the promotion
>> since it allow to fire the promotion operation (either creating a
>> trigger file or sending a signal) via SQL, not ssh etc.
> 
> I agree that having this available via SQL would be useful in a number
> of cases. pgpool or such being one, but also for example pgadmin.
> 
> 
>> If there's enough interest, I will propose such a function for next CF.
> 
> Just as a reminder, remember that next CF means 9.2.

Ok. I will write a C user function and add to pgpool source tree. I
think it will be fairly easy to create a trigger file in the function.
--
Tatsuo Ishii
SRA OSS, Inc. Japan
English: http://www.sraoss.co.jp/index_en.php
Japanese: http://www.sraoss.co.jp