Wednesday, March 21, 2012

Fault tolerant distributor in merge replication and data mirroring (in SQL Server 2005/200

Cluster it. It should be a local distributor.
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"Josep" <jmartinez@.autec.es> wrote in message
news:OT0UAqhUIHA.5404@.TK2MSFTNGP03.phx.gbl...
> Hello!
> My customer has SQL Server 2000 with Merge Replication, implementing a
> star tipology: one publisher (also distributor) and 11 push
> subscribers.And they want to move to SQL Server 2005/2008 and have a fault
> tolerant environment.
> I've thought that probably the best is to set up data mirroring for the
> publication, but the BOL says that data mirroring is not possible for the
> distribution database. So, what's the best way to do implement a fault
> tolerant system for the distribution database? (it's not needed to be
> automatic)
> Maybe doing backups and restores quite ofter of distribution database from
> the principal to the mirror? because we have the point that in merge
> replication only changes occurs there when the replication-schema is
> changed or a new identity range is given to a subscriber (when using
> automatic identity range).
>
> Thanks in advance!
> Josep
>
>
Your English is much better than my Spanish, and IMHO extremely good!
Again I think a restore of the publisher database or the distribution
database is your best bet. If the subscribers get ahead of the
distribution database due to a restore from an earlier version of the
distribution database, the subscribers will fill in any missing data
on the publisher.
On Jan 9, 5:13 am, "Josep" <jmarti...@.autec.es> wrote:[vbcol=seagreen]
> Ok. That's the best option, but it's quite expensive and my customer doesn't
> want it. When I said fault-tolerant I didn't mean "real time recovery", I
> should better have said that the downtime recovery process should be quite
> small: less than two hours.
> As it's a Merge Replication there can be this small downtime, that's why I
> was saying doing backup/restore of distribution database... but then I don't
> know how exactly would connect the subscribers to the distribution or other
> issues that can be there and I don't know... or, if as you said, cluster is
> the only option.
> Thank you!
> Josep.
> PS: Hilary, sorry for my English :-(
> "Hilary Cotter" <hilary.cot...@.gmail.com> escribi en el mensajenews:uDoLtIiUIHA.5132@.TK2MSFTNGP02.phx.gbl. ..
>
>
>
>

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