Re: Timeline Conflict

I've been trying to use repmgr for just that purpose. Looks like it simply creates/modifies a recovery.conf pointing primary_conninfo to the new master, and then restart. It does not seem to have the ability to resolve any timeline conflicts at all.

Am I using repmgr incorrectly?

-----Original Message-----
From: pgsql-general-owner(at)postgresql(dot)org [mailto:pgsql-general-owner(at)postgresql(dot)org] On Behalf Of Simon Riggs
Sent: Tuesday, August 02, 2011 12:07 PM
To: Merlin Moncure
Cc: senthilnathan; pgsql-general
Subject: Re: [GENERAL] Timeline Conflict

On Tue, Aug 2, 2011 at 2:55 PM, Merlin Moncure <mmoncure(at)gmail(dot)com> wrote:
> On Tue, Aug 2, 2011 at 12:59 AM, senthilnathan
> <senthilnathan(dot)t(at)gmail(dot)com> wrote:
>> We have system(Cluster) with Master replicating to 2 stand by servers.
>>
>> i.e
>>
>> M   |-------> S1
>>
>>      |-------> S2
>>
>> If master failed, we do a trigger file at S1 to take over as master. Now
>> we
>> need to re-point the standby S2 as slave for the new master (i.e S1)
>>
>> While trying to start standby S2,there is a conflict in timelines, since
>> on
>> recovery it generates a new line.
>>
>> Is there any way to solve this issue?
>
> AFAIK, the only solution is to follow the initial standby setup
> process to bring the standby up to sync with the new master.  One
> small comfort is that since the standby is mostly in the state it
> needs to be, an rsync based process might happen fairly quickly.  This
> of course means that if you lose the new master before the standby is
> up to speed you are facing data loss.  I'm really curious if anyone
> has figured out a potential solution to this problem.

http://projects.2ndquadrant.com/repmgr

solves the problem

--
 Simon Riggs                   http://www.2ndQuadrant.com/
 PostgreSQL Development, 24x7 Support, Training & Services

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