Windows 2008 in a failover ?

Posted on 2009-12-17
Last Modified: 2012-05-08
Hello Gurus,
We are in the process of getting a new servers for our company since we ar moving to a higher ERP system.

this is the layout I am looking at.

1 server AD
1 Server SQL Server
1 Server Exchange

10 PC desktops
30 Thin Clients

I have 2 points I would like you pros to help me with.

1-How do I do a failOver system ?
   I have searched and it seems that I could go 2 directions.
       a-Windows Failover... But can It be done on the whole 3 servers ? what about licensing ? Ive read that for passive mode
              (meaning my backup server would be sitting just waiting for the main to die to take over) I have no licensing fees ?  
         Can I cluster my AD server  ? My Exchange ? Can they be cluster to a virtual appliance (so I can replicate all 3 in 1 physical server ?)

      b-Symantec replication ... In that case there would be another server into play that would replicate all the data.
         but in that case can I replicate to a virtual servers all my initial 3 servers ? again what about licensing ?

      c-What version of Windows Server does failOver ? standard can do ? 64bit can do ?

2-Does Exchange Server do replication ? how ?

Question by:ammounpierre
    LVL 65

    Accepted Solution

    Clustering is failover, but it requires Enterprise edition of both Exchange and Windows. To cluster Exchange also requires a third server.

    You wouldn't cluster a domain controller, you would have two of them.
    Another option would be something like DoubleTake, Neverfail etc.

    As for licencing, no one on this site is authorised to answer those questions. Microsoft are the only ones who can answer that. I know for the Exchange based solutions you will require licences for all servers.

    The simply rule is that the longer you can be without the data the cheaper it is. Live failover is very expensive for a small number of users.


    Author Comment

    I did not know that it is not authorized to talk about MS licensing... We are just inquiring ...we are not stealing...nor hiding...nor trying to bend rules... Just inquiring !!!
    For example, what I know is that in a failover environment, you do not pay for the "second" copies... as long as they are in "passive" mode, meaning that the servers are "sitting ducks" just waiting for a failure to take over.
    in that case I know that MS policy is that you have a 30 day countdown to fix your primary so that u dont get charged !!

    Author Comment

    does SQL standard mirroring ?
    LVL 65

    Expert Comment

    No idea about SQL. It isn't a product I use very much.


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