Re: Cluster Between 2 Physical Locations?

"John Toner [MVP]" <jtoner@xxxxxxxxxxxxxxxxxxxxx> wrote in message
news:e0OjnpcIGHA.208@xxxxxxxxxxxxxxxxxxxxxxx
> Personally, I wouldn't use MNS for a geocluster unless you were able to
> configure a "3 site" model.

I am with John on this. If you can put in a witness node, then MNS works
nicely for geographically disperse clusters. However, MNS does not provide a
solution for any data that also needs to be replicated between sites.

> Geocluster is developed by NSI and it uses a software based replication
> solution. EMC developed GeoSpan (now called SRDF/CE) which utilizes EMC's
> SRDF remote mirroring technology. You should also check the HCL to make
> sure
> that your solution is fully supported.

To further expand on John's post, for two site implementations, the solution
needs to provide replication for both the quroum and the data drives for the
cluster. The solution also needs to provide a locking mechanism so the
passive site does not have access to any of the replicated information until
there is a failover or move of the resources.

Certified Geo cluster solutions are available in the windows catalog (HCL).

--
Russ Kaufmann

MVP - Windows Server - Clustering
http://www.clusterhelp.com - Cluster Website
http://msmvps.com/clusterhelp - Blog


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