Chapter 27

Database Mirroring

In This Chapter

Understanding the Database Mirroring Overview

Configuring Database Mirroring

Monitoring Database Mirroring

Pausing or Removing Database Mirroring

Using Role Switching

Experiencing High Availability/AlwaysOn

Configuring AlwaysOn Availability Groups

Monitoring AlwaysOn Availability Groups

Achieving high database availability is one of the most important goals for critical business applications. Database mirroring is a software solution offered by Microsoft SQL Server 2012 to achieve high database availability. Database mirroring enables you to maintain a copy of your production database that could potentially be completely synchronized on a separate server for failover if a failed production server or database occurs. Like log shipping, database mirroring provides high availability at the database level, but unlike log shipping, you can configure database mirroring to provide no data loss and automatic failover.

What's New in SQL Server Database Mirroring?
One of the most exciting new enhancements in SQL Server 2012 is the AlwaysOn Availability Groups feature, which is the next evolution of the existing mirroring technology. With AlwaysOn Availability Groups, SQL Server 2012 enables you to have multiple, readable secondary databases. AlwaysOn Availability Groups also allows you to group databases together so that in the event of failure they will fail over together.
Another important thing to note is that as of the release of ...

Get Microsoft SQL Server 2012 Bible now with the O’Reilly learning platform.

O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.

Start your free trial