Re: Replication

On 01/11/10 20:21, Scott Marlowe wrote:
> On Mon, Nov 1, 2010 at 2:12 PM, Jonathan Tripathy<jonnyt@abpni.co.uk>  wrote:
>> On 01/11/10 20:01, Thomas Kellerer wrote:
>>> Jonathan Tripathy wrote on 01.11.2010 20:53:
>>>> Hi Everyone,
>>>>
>>>> I'm looking for the best solution for "Hot Standbys" where once the
>>>> primary server fails, the standby will take over and act just like
>>>> the master did. The standby must support INSERTS and UPDATES as well
>>>> (once the master has failed)
>>>>
>>>> Are there any solutions like this? Looking on the Postgresql site,
>>>> all the standby solutions seem to be read only..
>>> 9.0 has streaming replication and "Hot Standby"
>>>
>>> http://www.postgresql.org/docs/current/static/hot-standby.html
>>>
>>> http://www.postgresql.org/docs/current/static/warm-standby.html#STREAMING-REPLICATION
>>>
>>> Regards
>>> Thomas
>>>
>>>
>>>
>> But does that not only allow "read-only" things to work on the standby?
> Yep.  Generally when to fail over is considered a business decision.
> I think only pgpool supports automatic failover but has a lot of
> limitations to deal with otherwise.

So really Postgresql doesn't have any "Hot Standbys" that once fail-over
has occurred, the system can act as normal? For this, would I have to
looking in Xen or VMWare HA?

I'm guessing the standbys in the "warm-failover" setup allow write
operations?

Thanks