[Linux-cluster] Postgresql under RHCS4

[Denis Medvedev]

Devrim GUNDUZ wrote:

>
> 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.

And now we have a SPOF - SAN or NAS... how to get beyond that?

>
> 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
>
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