Re: Comparaison on Exchange 2003 Clustering and Exchange 2007 SP1 SCR

Tech-Archive recommends: Fix windows errors by optimizing your registry

In terms of Exchange 2007 cluster solutions, CCR will typically always be preferred over SCC. See http://technet.microsoft.com/en-us/library/aa997928.aspx for some reasons why.

But it really depends on what your data loss tolerance is. Continuous replication (in any form) is not a zero data loss solution. You have the potential of losing a little bit of data on unscheduled outages. See http://technet.microsoft.com/en-us/library/bb124521.aspx for a discussion of the data that would be lost in the event of a failover. If you need a zero data loss solution, then your choice would be to use SCC and third-party replication.

If you don't need zero data loss, and you can tolerate possibly losing the data discussed in that article, then CCR+SCR would be our recommended deployment. SCR does not have any site membership requirements (although it does have domain membership requirements - see http://technet.microsoft.com/en-us/library/bb676502.aspx for more detail).

Hope this helps.
--
Regards,

Scott Schnoll
Microsoft Corporation
This posting is provided "AS IS" with no warranties, and confers no
rights. Please do not send email directly to this alias. This alias is for
newsgroup purposes only.


"Thinkpad21" <thinkpad21@xxxxxxxxx> wrote in message news:O2PL$b0OIHA.3556@xxxxxxxxxxxxxxxxxxxxxxx
thanks alot, after reading my question again, I noticed I left important information out...

Here is what the client wants to do :
The goal is to have DB, Server and site resiliency...They have under 1000 users, running single Exchange 2003 Server.

Scenario 1 : What client is thinking now
Exchange 2003 Cluster A/P on corp site.
Use a 3rd party product ( Neverfail witch they had previously purchased ) for site resiliency.


Scenario 2 : What we want to recommend them :
Exchange 2007 SP1 either CCR or SCC ( prefer CCR )
Use SCR for site resiliency
This will be on Windows 2003, so we have to make sure Exchange 2007 SP1 SCR with Win2K3 works...on different AD sites...

But client want's us to show them advantages and disadvantages of each...

Any help would be great...
Thanks !!!

--
--

"Bharat Suneja [MVP]" <bharat@xxxxxxxxxx> wrote in message news:eUD$gH0OIHA.3940@xxxxxxxxxxxxxxxxxxxxxxx
There's no comparison at all between the 2 because Standby Continuous Replication is not really clustering.

The equivalent of Exchange Server 2003's clustering model is Exchange Server 2007's Single Copy Cluster (SCC). Both use shared storage for Exchange data, which becomes the single point of failure. Comparatively, SCC (and Exchange Server 2007 clustering model in general) is simpler, does not co-exist with other server roles so no HTTP, SMTP, POP3, IMAP4 virtual servers on the cluster. SCC (like Exchange 2003) requires similar hardware and entire solution needs to be cluster-certified.

Single Copy Clusters
http://technet.microsoft.com/en-us/library/bb125217.aspx

Exchange Server 2007 also offers Cluster Continuous Replication (CCR).

Advantages of Cluster Continuous Replication over Single Copy Clusters
http://technet.microsoft.com/en-us/library/aa997928.aspx

You can use SCC or CCR to provide automatic failovers, and use SCR to provide another layer of redundancy (including across datacenters/sites). SCR can be used in any combination - clustered or non-clustered/standalone SCR sources can replicate to clustered/non-clustered SCR targets in a one-to-many and many-to-one relationship.

Standby Continuous Replication
http://technet.microsoft.com/en-us/library/bb676502.aspx

--
Bharat Suneja
MVP - Exchange
www.zenprise.com
NEW blog location:
exchangepedia.com/blog
----------------------------------------------


"Thinkpad21" <thinkpad21@xxxxxxxxx> wrote in message news:uTCPy1zOIHA.1212@xxxxxxxxxxxxxxxxxxxxxxx
Hi,

Was wondering if there is anywhere from MS or other sources that I can find advantages or disadvantages of Exchange 2003 Cluster and Exchange 2007 SP1 SCR.

I have a client that want's to implement Exchange 2003 Clustering, but trying to convince him to use Exchange 2007 SP1 SCR instead...

Can anyone provide any help please !!!

Thanks !!!

--







.

Relevant Pages