Enable Fast Start Failover Data Guard Broker

Nov 18, 20200 likes9 views

This document provides instructions for enabling fast-start failover (FSFO) between a primary and standby database. It describes setting the StaticConnectIdentifier parameter on both databases, defining the FastStartFailoverThreshold and FastStartFailoverLagLimit parameters, enabling FSFO, simulating a failure by aborting the primary instance, and checking the logs to confirm automatic failover occurred. It also provides instructions for reinstating the original primary and disabling FSFO.

ENABLE FAST-START
FAILOVER DATA
GUARD BROKER

Check StaticConnectIdentifier
In order to enable FSFO, the StaticConnectIdentifier parameter
must be set both in primary and standby

The StaticConnectIdentifiertakes its value from LOCAL_LISTENER parameter
from the database. If this value is not set (or blank) for any database above,
then connect to sqlplus and edit LOCAL_LISTENER parameter
If StaticConnectIdentifier is blank

Once you make changes to LOCAL_LISTENER parameter, you must restart
the listener.

Next we need to let broker know when to initiate automatic failover.
What is the time (in seconds) that FSFO will wait before initiating failover
Define FastStartFailoverThreshold

We can optionally define how much time (in seconds) data we are ready
to lose in case the Data Guard is in Max Performance Mode
Define FastStartFailoverLagLimit

Enable FSFO
Now we can enable FSFO. Never start observer on production database

Test FSFO configuration
Let us simulate a failure. We will abort primary (proddb) instance
and wait for FSFO to perform automatic failover.

Simulate failure
On proddb, the current primary, let us shut abort the instance

Check logfiles
At this stage, check alert log and observer log files. FSFO must perform
automatic failover and proddb_st would be your new primary database

Reinstate failed primary
Mount the failed primary(proddb) and it will auto reinstate. Note: do not
open the database as it will be switched to physical standby

You can perform switchover to get back the original configuration

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1. ENABLE FAST-START FAILOVER DATA GUARD BROKER

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3. The StaticConnectIdentifiertakes its value from LOCAL_LISTENER parameter from the database. If this value is not set (or blank) for any database above, then connect to sqlplus and edit LOCAL_LISTENER parameter If StaticConnectIdentifier is blank

4. Once you make changes to LOCAL_LISTENER parameter, you must restart the listener.

6. Next we need to let broker know when to initiate automatic failover. What is the time (in seconds) that FSFO will wait before initiating failover Define FastStartFailoverThreshold

7. We can optionally define how much time (in seconds) data we are ready to lose in case the Data Guard is in Max Performance Mode Define FastStartFailoverLagLimit

8. Enable FSFO Now we can enable FSFO. Never start observer on production database

9. Test FSFO configuration Let us simulate a failure. We will abort primary (proddb) instance and wait for FSFO to perform automatic failover.

10. Simulate failure On proddb, the current primary, let us shut abort the instance

11. Check logfiles At this stage, check alert log and observer log files. FSFO must perform automatic failover and proddb_st would be your new primary database

12. Reinstate failed primary Mount the failed primary(proddb) and it will auto reinstate. Note: do not open the database as it will be switched to physical standby

13. You can perform switchover to get back the original configuration

14. Disable FSFO

15. Courses | Projects | Bootcamps

Enable Fast Start Failover Data Guard Broker

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