Hi,
I have 2 physical site - HQ & DR
MAILBOX DAG Members = 3
HQ Servers
mbx01
mbx02
DR Server
mbxdr
DR site is just for standby purpose in case all servers down in HQ.
http://technet.microsoft.com/en-us/library/dd979790.aspx
Based on the link above, if I enable DAC for this DAG Group, when the HQ site down, it will auto swing over to DR Site? Do I need to manually swing it?
How DAC know which server is in HQ, which server in DR? Based on the network subnet?
Second Question
If I didn't enable DAC
Understand that if running on odd number of node in DAG/ Cluster (Example my side have 3 server), it must have 2 servers up at 1 time (Node Majority)
It cannot afford 2 servers down at 1 time (mailbox service will down)
If I enable DAC, total 3 DAG member are running, can it afford 2 x HQ Servers down? Only DR Server serve user?
http://technet.microsoft.com/en-us/library/cc770620%28v=ws.10%29.aspx#BKMK_requirements