automatic failover feature in configurations set up for zero data loss protection at any There is no data loss during a switch-over. fsfocallout.ora. If the agent is not A number of prerequisites must be met on the primary in order to use Fast-Start Failover. Each database in a Data Guard configuration must have a unique name. See the Cloud Control online help for more information. an alias of the broker configuration name. You can customize fast-start failover setup for a specific application by using the DBMS_DG PL/SQL package. In addition, the primary database will shut down if it perceives a loss of connectivity for a period longer than FastStartFailoverThreshold seconds, if the FastStartFailoverPmyShutdown configuration property is set to TRUE. The remaining observers are called backup observers. This is because the -role qualifier is taken into account only by Data Guard broker, and at database startup. Now let's test switchover in the other direction. [PATCH V3 0/6] ASoC: codecs: Add Awinic AW883XX audio amplifier driver This may result in data loss. ORACLE-BASE - Data Guard The foundation of FSFO is Data Guard - a primary and at least one standby. gets enabled and then begins monitoring. fast-start failover through Cloud Control. If the configuration is not failable, the DBMS_DG.INITIATE_FS_FAILOVER function returns an ORA error number (it does not signal an exception) informing the caller that a fast-start failover could not be performed. An application should use caution when calling the DBMS_DG.INITIATE_FS_FAILOVER function because the observer will initiate failover, if at all possible. Additionally, the new master observer is identified in the output shown for the SHOW FAST_START FAILOVER and SHOW OBSERVER commands. If the observer is stopped abnormally (for example, by typing CTRL/C), restart it and reference the existing fsfo.dat file with the FILE IS qualifier. Note that the value of the FastStartFailoverPmyShutdown configuration property must be FALSE for the primary to stall indefinitely under these conditions. fsfo_postcallout are stored in the same location as To get started, all you'll need is Oracle Database Enterprise Edition Release 10.2 or later, a database, and three hosts: two for the databases and a small host for the FSFO observer. It will also alert you to databases that have had Flashback Database disabled at some point after FSFO was enabled. The rest of this section provides examples of using DGMGRL SHOW commands to display fast-start failover information and includes sections describing the following views: The DGMGRL SHOW FAST-START FAILOVER command displays all the fast-start failover related information. The failover was to a logical standby database. In short, the failover is the deformation of the production (primary) database and activating standby database as the primary. usually within three seconds if fast-start failover is enabled. To start a switchover using Cloud Control, select the standby database that you want to change to the primary role and click Switchover. When querying the V$DATABASE view, pay special attention to the following: The FS_FAILOVER_STATUS column, which can contain the values described in Table 6-2. If no name is specified for the observer then a default observer name, the host name of machine where the START OBSERVER command is issued, is used.
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