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Microsoft® Lync® Server 2013 Unleashed Second Edition by Randy Wintle, Alex Lewis, David Ross, Tom Pacyk

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SQL Mirroring for Databases

The one weak spot in any Office Communications Server 2007 R2 or Lync Server 2010 deployment was the backend SQL database for each Front End pool. This was traditionally a SQL server cluster hosted by multiple nodes, but the storage for the database had to be a single SAN. Administrators were anxious to remove this single point of failure by leveraging a feature in SQL called database mirroring, in which the databases are kept in sync between two separate nodes each with their own storage. It was technically possible to configure SQL mirroring for the database, but there was no automated or easy way to fail over between the mirrored nodes. More importantly, it wasn’t ever a scenario supported by Microsoft.

Lync Server ...

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