Hello all,
We are planning on implementing AlwaysOn, and I have been researching it lately. However, I have not starting actually testing it yet, so I'm a little confused on certain things.
My questions is this (best explained with an example): We have multiple databases that are hosted on two separate SQL instances - 3 databases on SQL Instance X, 7 databases on SQL Instance Y. Can we make all 10 of these databases the primary replica of an Availability Group (AG) and have them all fail over to a secondary replica in the AG in the event of a problem? Based on the illustration in the link below, it seems like all the databases in a primary replica of an AG have to be contained within one SQL instance, but I need someone to confirm that is true.
http://technet.microsoft.com/en-us/library/ff877884.aspx
If this is true, can I create two AGs (one with the primary replica containing databases from SQL Server x, and the other from SQL Server y), and then have them both fail over if one of the two experiences a problem?
Thanks in advance,
Clint
Clint