Skip site navigation (1) Skip section navigation (2)

Re: Replication Options.

From: Pallav Kalva <pkalva(at)deg(dot)cc>
To: Chris Browne <cbbrowne(at)acm(dot)org>
Cc: pgsql-admin(at)postgresql(dot)org
Subject: Re: Replication Options.
Date: 2004-11-09 14:37:07
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-admin
Chris Browne wrote:

>pkalva(at)deg(dot)cc (Pallav Kalva) writes:
>>    I need to implement the following the replication scenario in
>>postgres database. Here are the details of what we are looking to
>>Lets say I have 2 nodes Node1(US) and Node2(Canada),
>>Node1: tableA , tableB
>>Node2: tableB , tableA
>>tableA in Node1 is the master and it should replicate only to slave
>>tableA in Node2
>>tableB in Node2 is the master and it should replicate only to slave
>>tableB in Node1
>>Can this be possible with any of the replication models available for
>>Postgres 7.4/8.0 ?
>This scenario would be supported by Slony-I; there are several ways to
>accomplish it, probably the easiest being thus...
>- Create two nodes, 1 and 2
>- Create two replication sets - #1 and #2.
>  - Set 1 has origin of node 1
>  - Set 2 has origin of node 2
>  - Add tablea to set 1
>  - Add tableb to set 2
>  - Subscribe node 2 to set 1
>  - Subscribe node 1 to set 2
>Either node can run PG 7.4 or 8.0...
Hi Chris,

    Based on your suggestion I tried to setup replication for my 
envrionment and I ran into problems. To start of with initially, I tried 
to replicate on the same host with one master database and one slave 
database, I used the same expample as in docs for Slony replication and 
it went fine and I could replicate the changes and I could see them at 
the slave database immediately.
    Then I tried to do the above setup where tableA is the master in one 
node and tableB is the master in another node (in this case I used the 
same host)  and they have to replicate each other. I created 2 sets in 
the initial configuration script and added tables to each sets , when i 
run the script i get the following error :

<stdin>:44: PGRES_FATAL_ERROR select "_slony_example".storeSet(2, 'All 
testslave tables');  - ERROR:  schema "_slony_example" does not exist

   I am attaching the script and also the environment variables i used 
for the script. am I missing something  in setup configuration or this 
type of configuration is not possible with Slony.

Thanks! again.

Description: application/x-sh (2.3 KB)
Attachment: slony_env_variables
Description: text/plain (197 bytes)

In response to

pgsql-admin by date

Next:From: Carlos LopezDate: 2004-11-09 14:56:31
Subject: Re: [PERFORM] poor performance in migrated database
Previous:From: GeoffreyDate: 2004-11-09 12:51:20
Subject: Re: Where is postgresql??

Privacy Policy | About PostgreSQL
Copyright © 1996-2017 The PostgreSQL Global Development Group