|Oracle® Data Guard Broker
12c Release 1 (12.1)
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This preface lists changes in Oracle Data Guard Broker.
The following are changes in Oracle Data Guard Broker for Oracle Database 12c Release 1 (12.1).
The following features are new in this release:
Oracle Data Guard broker supports multitenant container databases (CDBs) within a broker configuration.
Support for the new Oracle Data Guard
SYSDG administrative privilege when using DGMGRL to connect to a database.
A new DGMGRL command,
VALIDATE DATABASE, enables you to quickly and easily determine whether a database is ready to perform a role change.
See "VALIDATE DATABASE".
New DGMGRL commands enable you to add far sync instances to an Oracle Data Guard configuration and to manage them.
See Chapter 7 for information on commands related to management of far sync instances in a broker configuration.
A new configurable property,
RedoRoutes, supports redo cascading and far sync instances.
You can use the new
EDIT CONFIGURATION (RENAME) command to change the name of an Oracle Data Guard broker configuration. You no longer have to remove and re-create the configuration using a different name.
You can now easily reset an Oracle Data Guard broker property back to its default value. You can do this at the configuration, database, or instance level.
A new high performance redo transport mode,
FASTSYNC, supports the maximum availability data protection modes.
See "LogXptMode" for information about setting redo transport modes.
An Oracle Data Guard broker configuration can be preserved during a rolling upgrade so that it does not have to be rebuilt after the upgrade is complete.
You can now execute a SQL statement or a PL/SQL stored procedure from the Data Guard command-line interface (DGMGRL) so that you do not have to exit and restart command line interfaces multiple times for routine tasks.
Oracle Data Guard broker supports the new Oracle Global Data Services (GDS) feature of Oracle Database 12c Release 1 (12.1).
Oracle Database Global Data Services Concepts and Administration Guide for more information about GDS.
You can now call the
DBMS_DG PL/SQL procedure from a fast-start failover target standby database.
You can now resume a switchover after a failure.
You can now control the amount of tracing performed by the broker for every database in the configuration.
See the "TraceLevel" configuration property.
ObserverReconnect configuration property allows you to specify an interval at which the observer disconnects and reconnects to the primary and standby database.
See the "ObserverReconnect" property.
ObserverOverride configuration property allows you to specify whether the observer should initiate an automatic failover when it loses connectivity to the primary, even if the standby has a healthy connection to the primary.
See the "ObserverOverride" configuration property.
ApplyLagThreshold configurable property allows you to set a maximum value for the apply lag on physical and logical standbys. A warning is issued if the limit is exceeded.
See the "ApplyLagThreshold" property.
TransportDisconnectedThreshold configurable property allows you to set a limit on the amount of time that can elapse without communication from the primary. A warning is issued if the limit is exceeded.
See the "TransportDisconnectedThreshold" property.
TransportLagThreshold configurable property allows you to set a limit for a database's transport lag. A warning is issued if the limit is exceeded.
See the "TransportLagThreshold" property.
Application Continuity is supported for Oracle Data Guard and Oracle Active Data Guard switchovers to physical standby databases. It is also supported for fast-start failover to physical standbys in maximum availability data protection mode. Note that primary and standby databases must be licensed for Oracle RAC or Oracle Active Data Guard in order to use Application Continuity. See "Application Continuity."
The following features are deprecated in this release, and may be desupported in a future release:
The following configurable properties have been deprecated:
The following monitorable properties have been deprecated:
Some features previously described in this document are desupported in Oracle Database 12c Release 1 (12.1). See Oracle Database Upgrade Guide for a list of desupported features.
The following are additional changes in the release:
You cannot create a broker configuration if the primary database for that configuration has any remote redo transport destinations, unless those remote redo transport destinations have the
If the primary database has any remote redo transport destinations that do not have the
NOREGISTER attribute, then you must clear them before proceeding. You can then configure remote redo transport destinations after a broker configuration has been created.