Exchange 2010 3 server multi site wan DAG advice
Posted on 2010-11-24
Hey all, I have been messing with exchange 2010 DAG, tryna work out the ins and outs.
I have the following setup
1 Exchange server A, site A , live users
1 Exchange server B, site B, live users
1 Exchange server C, site C, no live users
My goal is as follows:
1) setup 3 server DAG, replicate server A to C (active passive) and B to C (active passive) - this part I know how to do
2) make sure that servers NEVER fail over without human intervention, example server A can never dismount its stores without being ordered to do so by a person, server C can never make a passive dbase active without a human order. How do I setup a dag to behave like this?
3) In a 3 server setup for DAG, apparently I do not need the witness server, but initially when I created the DAG with first 2 servers, it made a witness server, how do i get rid of witness server? or will exchange just ignore it?
4)lets say power goes out in exchange site A, I manually bring the dbase online in site C, and users connect to site C and use email. Now power comes back on in site A and exchange server turns on. Will exchange server in site A contact site B and C and see that dbase is active in site C and not mount? or do i risk the split brain thing?
What problems that I do not understand or foresee do I risk with a setup like this?