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sys.database_mirroring_witnesses (Transact-SQL)

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).

Column name

Data type

Description

database_name

sysname

Name of the two copies of the database in the database mirroring session.

principal_server_name

sysname

Name of partner server whose copy of the database is currently the principal database.

mirror_server_name

sysname

Name of the partner server whose copy of the database is currently the mirror database.

safety_level

tinyint

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.

safety_level_desc

nvarchar(60)

Description of safety guarantee of updates on the mirror database:

UNKNOWN

OFF

FULL

safety_sequence_number

int

Update sequence number for changes to safety_level.

role_sequence_number

int

Update sequence number for changes to principal/mirror roles played by the mirroring partners.

mirroring_guid

uniqueidentifier

Identifier of the mirroring partnership.

family_guid

uniqueidentifier

Identifier of the backup family for the database. Used for detecting matching restore states.

is_suspended

bit

Database mirroring is suspended.

is_suspended_sequence_number

int

Sequence number for setting is_suspended.

partner_sync_state

tinyint

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.

partner_sync_state_desc

nvarchar(60)

Description of the synchronization state of the mirroring session:

SYNCHRONIZED

UNSYNCHRONIZED

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.

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