Applies To: SQL Server 2014, SQL Server 2016 Preview
Contains a row for every witness role that a server plays in a database mirroring partnership.
Applies to: SQL Server (SQL Server 2008 through current version).
Name of the two copies of the database in the database mirroring session.
Name of partner server whose copy of the database is currently the principal database.
Name of the partner server whose copy of the database is currently the mirror database.
Transaction safety setting for updates on the mirror database:
0 = Unknown state
1 = Off (asynchronous)
2 = Full (synchronous)
Using a witness for automatic failover requires full transaction safety, which is the default.
Description of safety guarantee of updates on the mirror database:
Update sequence number for changes to safety_level.
Update sequence number for changes to principal/mirror roles played by the mirroring partners.
Identifier of the mirroring partnership.
Identifier of the backup family for the database. Used for detecting matching restore states.
Database mirroring is suspended.
Sequence number for setting is_suspended.
Synchronization state of the mirroring session:
5 = The partners are synchronized. Failover is potentially possible. For information about the requirements for failover see, Role Switching During a Database Mirroring Session (SQL Server).
6 = The partners are not synchronized. Failover is not possible now.
Description of the synchronization state of the mirroring session:
The visibility of the metadata in catalog views is limited to securables that a user either owns or on which the user has been granted some permission. For more information, see Metadata Visibility Configuration.