Exchange 2010 SP1 - Required DAG number of nodes for Primary and Secondary Data Center deployment

  • Thread starter Zahir Hussain Shah
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Zahir Hussain Shah

I have two DAG Mailbox Members in the Primary Data Center, and one Mailbox Server in the DR Data Center, our DAG is stretched between two data centers.

Primary Data Center will be having Witness Server on one of the HUB Transport Server.
Question:
1) Do I need to have witness server (configured in standby mode) to recover from the Primary Data Center failure and switch over to DR Data Center?
2) In the shared name space how I will be swtiching over the clients from primary data center to secondary data center.
Kindly answer of the above mentioned questions.
Zahir

Zahir Hussain Shah Infrastructure Practice Consultant My blog: http://zahirshahblog.com
 
U

UKZNMCL

1) Do I need to have witness server (configured in standby mode) to recover from the Primary Data Center failure and switch over to DR Data Center?

Yes your witness server will need to be online constantly and be able to see both DAG members. Your witness server can either be a hub transport server or any file server.

2) In the shared name space how I will be swtiching over the clients from primary data center to secondary data center.

The Client Access Servers will automatically redirect the users to their mailboxes so the users will know no different.
 
J

James-Luo

1) Do I need to have witness server (configured in standby mode) to recover from the Primary Data Center failure and switch over to DR Data Center?

In case the datacenter that contains witness server down, a secondary witness server is required

Example: site A has node 1, 2 and FSW, site B has node 3 and 4. When site A down, you use alternative FSW to keep the cluster in site B

2) In the shared name space how I will be swtiching over the clients from primary data center to secondary data center.

You need to change relevant DNS records, please see the article below

Datacenter Switchovers

James Luo

 
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