The Art of SQL Server FILESTREAM - Red Gate Software

Chapter 10: Integrating FILESTREAM with other SQL Server FeaturesIf we attempt the same using T-SQL, SQL Server will generate the following error whenthe SET PARTNER command is issued:A database cannot be enabled for both FILESTREAM storage and Database Mirroring.One of the reasons for not allowing mirroring of a FILESTREAM-enabled databasecould be the excessive amount of FILESTREAM log data that might need to beransferred to the mirror server if a lot of FILESTREAM activity takes place on thedatabase. Since SQL Server does not allow in-place update of FILESTREAM datavalues, every modification generates a new file, which has to be transferred to themirror server.FILESTREAM and High Availability DisasterRecoveryIn SQL Server 2012, the new High Availability Disaster Recovery – Always On (HADRON)feature does support creating highly available database nodes, even with FILESTREAMenableddatabases. HADRON was designed to meet the high availability needs of awide variety of SQL Server users, and so allow other features that were being used forhigh availability and disaster recovery (including replication, log shipping, and databasemirroring discussed earlier in this chapter) to focus on the problems they were designedto solve.384