Re: What is the best solution you can give about IIS7 NLB & Clustering SQL

Hi Narbeh,

this is generally possible for SQL and is called geographically stretched
cluster -> http://technet.microsoft.com/en-us/l.../bb742374.aspx
In this solution you will need also an storage based replication like a.e.
HP continiuos access or EMC SRDF
http://www.emc.com/products/detail/software/srdf.htm
http://h18000.www1.hp.com/products/s.../conaccesseva/

Note : As far as I'm aware SQL 2008 cluster does not support when cluster
nodes reside on different subnets, which does mean that you still need to
"stretch" your VLAN to your England location.
Should be checked here ->
http://download.microsoft.com/downlo...erCluster.docx

For NLB you need to use hardware based load balancer (a.e. F5 BIGIP) which
are capable to switch over the traffic on demand.

My personal opinion here is, you should consult an IT company with "DR"
experience for getting support during this scenario as there are sooo many
hints which you need to be carefully during your planning and
implementation.

Hope that helps

Regards
Ramazan

"narbeh" <> wrote in message
news:...
>
> Hi All,
> Our company looks for a solution to expand the network infrastructure.
> We will be having Windows Server 2008 Standard & SQL Server 2005
> Enterprise.
>
> In Germany, we will have 6 servers:
> ServerA1, ServerA2 -> NLB for the main website.
> ServerB1, ServerB2 -> NLB for wcf Service
> ServerSQL1, ServerSQL2 -> Failover clustering
> "As I am new to clustering and NLB, i have no info about the hardware
> requirements or shared storage, please help me"
>
> And In England, we are looking to get a Server 2008 Standard + SQL
> Server 2005 Enterprise installed on one mashine or maybe separate
> servers and join them to Germany's NLB and SQL CLuster.
>
> So, our users should allways connect to Servers in germany, but in case
> of internet disconnection or the servers are down, user should be able
> to work with servers in England without knowing what is happening.
>
> I'd be grateful if you could correct me if any mistake, give me the best
> solution, even better if you could create a map using visio would be
> much appriciated.
> Thanks all.
>
>
> --
> narbeh
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