sys.database_mirroring_witnesses (Transact-SQL)
Contains a row for every witness role that a server plays in a database mirroring partnership.
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 |
Permissions
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.
Zobacz także
Odwołanie
sys.database_mirroring (Transact-SQL)
sys.database_mirroring_endpoints (Transact-SQL)