From: | Jaime Casanova <jaime(at)2ndquadrant(dot)com> |
---|---|
To: | e-blokos <infos(at)e-blokos(dot)com> |
Cc: | pgsql-general(at)postgresql(dot)org |
Subject: | Re: about synchronous_standby_names or sync replic |
Date: | 2011-09-23 03:38:14 |
Message-ID: | CAJKUy5g6r8KHYAQswa1mSxfe-Cax8Tmp=M--NQLrwbQX3vtkpg@mail.gmail.com |
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Lists: | pgsql-general |
On Thu, Sep 22, 2011 at 2:34 PM, e-blokos <infos(at)e-blokos(dot)com> wrote:
> Hi Folks,
>
> I wonder if it's possible to have a sync replication only from the the node
> where the client
> who update the DB and other node replicated asynchronously ?
>
> example :
> nodeCentral node1 node2 node3
>
> user1 from node3 update db to nodeCentral (master) so nodeCentral
> replicates synchronously node3 and later other nodes...
>
yep, put the names of all the nodes in synchronous_standby_names and
set synchronous_commit to local... then when someone sends a write
command to the server "set synchronous_commit to on" (of course, this
SET is a command you send to the server just like any other SQL
command)
don't forget to reset synchronous_commit or use set local, otherwise
you will let this node as the sync rep until disconnect
--
Jaime Casanova www.2ndQuadrant.com
Professional PostgreSQL: Soporte 24x7 y capacitación
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