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Your network contains two servers named Server1 and Server2 that run Microsoft SQL Server. All of the databases on Server1 are mirrored to Server2. You have a SharePoint Server 2010 Service Pack 1 (SP1) server farm that is configured to use Server1 as the database server for all of the databases.
You need to ensure that users can access all SharePoint sites if Server1 fails.
What should you configure?
A. the Business Data Connectivity service application
B. a failover server for each SharePoint database
C. a failover server for each service applicaiton
D. a failover server for each content database
Correct Answer: B
Explanation/Reference:
Mirroring Support for SharePoint 2010 Databases
Like all systems built on top of SQL Server SharePoint 2010 needs to have a plan for availability. There are many methods for configuring high availability, one of which is database mirroring. Other options, such as clustering will be discussed separately.
Database mirroring is a SQL Server technology used for providing database redundancy. It is configured on a database level, not the server level. With this method any transaction on the the principal server are sent to the mirror server/database as soon as the transaction log buffer is written to disk on the principal server/database. The downtime in failover is generally measured in seconds, not minutes.
SharePoint supports both mirroring and clustering for failover. While both do a great job in the case of a failure the question often comes up as to what databases support each option. Many service applications create their own databases, such as the Search Service creating an administration, crawl and property database. The vast majority of the databases support mirroring with the exception of only two at the time of writing. Keep in mind this is information taken from MSDN and applied to SQL Server 2008 R2 and SharePoint 2010. This information could change for SQL Server 2012 as the back end or with future versions of SharePoint.
The only two databases that do not support mirroring are:
User Profile Service: Synchronization database
Web Analytics Service: Staging database
http://www.bidn.com/blogs/BradSchacht/ssis/2646/mirroring-support-for-sharepoint-2010-databases
http://technet.microsoft.com/en-us/library/cc748824.aspx
