Re: Additional options for Sync Replication

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От Heikki Linnakangas
Тема Re: Additional options for Sync Replication
Дата
Msg-id 4D909713.1060005@enterprisedb.com
обсуждение исходный текст
Ответ на Re: Additional options for Sync Replication  (Simon Riggs <simon@2ndQuadrant.com>)
Ответы Re: Additional options for Sync Replication  (Robert Haas <robertmhaas@gmail.com>)
Re: Additional options for Sync Replication  (Simon Riggs <simon@2ndQuadrant.com>)
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On 28.03.2011 16:11, Simon Riggs wrote:
> On Mon, Mar 28, 2011 at 2:05 PM, Heikki Linnakangas
> <heikki.linnakangas@enterprisedb.com>  wrote:
>>   It would feel at least as logical to control this in the standby.
>
> Now you are being ridiculous. You've spoken strongly against this at
> every single step of this journey.

I was thinking specifically about whether flush vs. write (vs. apply, 
maybe) here. It would make sense to set that in the standby. You might 
even want to set it differently on different standbys.

What I was strongly against is the action at a distance, where setting a 
GUC in a standby suddenly makes the master to wait for acks from that 
server. That's dangerous, but I don't see such danger in setting the 
level of synchronicity in the standby, once you've decided that it's a 
synchronous standby.

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


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