Anyone deployed stretch clustering ?

Ive come across this article
http://www.microsoft.com/technet/pro...y/hasog05.mspx
and was interested in stretch clustering .. and have one node of my cluster
in a geographic dispersed location ..
Has anyone done that and can elaborate more on the storage section of this
doc.. We have EMC SAN in place and curious on the technology of how to make
those 2 SANs appear to be one SAN to the MSCS cluster.. Basically if i setup
a 3 node cluster with 2 passive.. each of the passive nodes being on
different geographical sites and my priority of failover would be is Prodn
Server A fails, then it would failover to the local passive node and if
thats not available ( due to site failure) then move to passive node on the
other site.. Is this possible ? Love to hear more
Hassan,
You would need to first implement a remote mirroring solution with your SAN.
EMC's solution, SRDF (Symmetrix Remote Data Facility), is one of the only
solutions that has been qualified for geographically dispersed Microsoft
clusters. If you implement SRDF, you should also look into EMC's
SRDF/Cluster Enabler for MSCS product (formerly known as GeoSpan) to
automate the failover to the remote site. It's a nice solution and it works
quite well.
If you're considering a geographically dispersed clustering solution, you
might want to take a look at the following KB article for some of the
restrictions/limitations of such a solution:
http://support.microsoft.com/?id=280743
Regards,
John
"Hassan" <fatima_ja@.hotmail.com> wrote in message
news:ezMQejIkEHA.1996@.TK2MSFTNGP09.phx.gbl...
> Ive come across this article
> http://www.microsoft.com/technet/pro...y/hasog05.mspx
> and was interested in stretch clustering .. and have one node of my
cluster
> in a geographic dispersed location ..
> Has anyone done that and can elaborate more on the storage section of this
> doc.. We have EMC SAN in place and curious on the technology of how to
make
> those 2 SANs appear to be one SAN to the MSCS cluster.. Basically if i
setup
> a 3 node cluster with 2 passive.. each of the passive nodes being on
> different geographical sites and my priority of failover would be is Prodn
> Server A fails, then it would failover to the local passive node and if
> thats not available ( due to site failure) then move to passive node on
the
> other site.. Is this possible ? Love to hear more
>
>
|||One challenge u may face with stretch is the fact that the IP Heartbeat has
to be on same subnet and have a guaranteed roundtrip of <500ms as per below
http://www.microsoft.com/technet/pro.../geoclust.mspx
Also with 3 node you will need either Datacenter or Windows 2003
Andy.
"Hassan" <fatima_ja@.hotmail.com> wrote in message
news:ezMQejIkEHA.1996@.TK2MSFTNGP09.phx.gbl...
> Ive come across this article
> http://www.microsoft.com/technet/pro...y/hasog05.mspx
> and was interested in stretch clustering .. and have one node of my
cluster
> in a geographic dispersed location ..
> Has anyone done that and can elaborate more on the storage section of this
> doc.. We have EMC SAN in place and curious on the technology of how to
make
> those 2 SANs appear to be one SAN to the MSCS cluster.. Basically if i
setup
> a 3 node cluster with 2 passive.. each of the passive nodes being on
> different geographical sites and my priority of failover would be is Prodn
> Server A fails, then it would failover to the local passive node and if
> thats not available ( due to site failure) then move to passive node on
the
> other site.. Is this possible ? Love to hear more
>
>
sql