Re: Bidirectional replication

Best to start with..

http://bucardo.org/wiki/Bucardo/Installation

Best Regards,
Raghavendra
EnterpriseDB Corporation
Blog: http://raghavt.blogspot.com/

On Tue, May 3, 2011 at 5:34 PM, tushar nehete <tpnehete(at)gmail(dot)com> wrote:

> Thanks you all,
> I started with Bucardo. I installed activeperl 5.12 on my Linux(RHEL5.5)
> server.
> Can you please suggest some link which describe the installation steps in
> details.
>
>
> Thanks,
> Tushar
>
> On Tue, May 3, 2011 at 2:49 PM, Simon Riggs <simon(at)2ndquadrant(dot)com> wrote:
>
>> On Tue, May 3, 2011 at 7:31 AM, Sim Zacks <sim(at)compulab(dot)co(dot)il> wrote:
>>
>> > I have heard good things about Bucardo, though I haven't tried it myself
>> > yet. I was warned that it would be risky to have 2 masters that have the
>> > same tables modified in both because of issues such as delayed sync,
>> race
>> > conditions and other such goodies that may corrupt the meaning of the
>> data.
>>
>>
>> Just to be clear and fair to Bucardo, I would add a few points.
>>
>> All multi-master replication solutions that use an optimistic
>> mechanism require "conflict resolution" cases and code. This is the
>> same with SQLServer and Oracle etc.. Referring to a well known problem
>> as a race condition seems to introduce doubt and fear into a situation
>> that is well understood. Bucardo does offer hooks for conflict
>> resolution to allow you to program around the issues.
>>
>> So if I felt that multi-master replication was the right way to go for
>> a solution, Bucardo is a good choice.
>>
>> Just to add other info: if multi-master replication uses pessimistic
>> coherence, then the coherence mechanism can also be a source of
>> contention and/or cause the need for alternative kinds of conflict
>> resolution.
>>
>> --
>> Simon Riggs http://www.2ndQuadrant.com/
>> PostgreSQL Development, 24x7 Support, Training & Services
>>
>> --
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>
>