[Pacemaker] DRBD and fencing

[Darren.Mansell at opengi.co.uk]

On Wed, Mar 10, 2010 at 02:32:05PM +0800, Martin Aspeli wrote:
> Florian Haas wrote:
>> On 03/09/2010 06:07 AM, Martin Aspeli wrote:
>>> Hi folks,
>>>
>>> Let's say have a two-node cluster with DRBD and OCFS2, with a
database
>>> server that's supposed to be active on one node at a time, using the
>>> OCFS2 partition for its data store.
>> *cringe* Which database is this?
>
> Postgres.
>
> Why are you cringing? From my reading, I had gathered this was a
pretty
> common setup to support failover of Postgres without the luxury of a
> SAN. Are you saying it's a bad idea?

PgSQL on top of DRBD is OK.  PgSQL on top of OCFS2 is a disaster waiting
to
gnaw your leg off.


--------------

Please forgive my ignorance, I seem to have missed the specifics about
using OCFS2 on DRBD dual-primary but what are the main issues? How can
you use PgSQL on dual-primary without OCFS2?

Thanks
Darren