[Linux-cluster] Postgresql under RHCS4

[Devrim GUNDUZ]

Hi,

On Mon, 22 May 2006, carlopmart wrote:

> No Devrim, I mean which can be the best form to setup replication between 
> master and slave ... and when master goes down, if I put data on slave how 
> can I update master node.

You don't need a replication system there. Use an SAN :)

Here is the schema:

+-------+		+-------+
|Master |		|Slave	|
|	|		|	|
|Node	|		|Node	|
+-------+		+-------+
    |			    |
    --------------------------
 		|
 		|
 	+--------------
 	|	      |
 	| SAN or NAS  |
 	|	      |
 	+-------------+


You will install just operating system,PostgreSQL binaries and Cluster 
tools to both Master and Slave nodes. All $PGDATA will reside in the 
storage.

If master node goes down, Slave node will mount $PGDATA and continue 
working. When master node is up, slave will umount $PGDATA, stop its 
postmaster and will trigger master node and start its postmaster so that 
data will not be corrupted.

Regards,
--
Devrim GUNDUZ
Kivi Bilişim Teknolojileri         -          http://www.kivi.com.tr
devrim~gunduz.org, devrim~PostgreSQL.org, devrim.gunduz~linux.org.tr
                       http://www.gunduz.org