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Oracle 12.2 - Simplified OBSERVER Management for Multiple Fast-Start Failover Configurations (Doc ID 2285891.1)

Last updated on NOVEMBER 19, 2018

Applies to:

Oracle Database - Enterprise Edition - Version 12.2.0.1 to 12.2.0.1 [Release 12.2]
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Backup Service - Version N/A and later
Information in this document applies to any platform.

Goal

Simplified observer management :- One command to manage multiple observers on different FSFO configuration. Separate observers are must to manage each FSFO configuration but the management of Observers are done in a group via single dgmgrl prompt. Users can either manage the observer separately like pre 12.2 case or manage observers in a group.

Solution

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In this Document
Goal
Solution
 Please also be aware about the following Bug which is in 12.2.

For this feature we need ensure the below fix is in place
 <Bug 28847136 - OBSERVER DOES NOT INITIATE FAILOVER WHEN USING OBSERVER.CONF Bug 28847136 - OBSERVER DOES NOT INITIATE FAILOVER WHEN USING OBSERVER.CONF <    Bug 28847136> - OBSERVER DOES NOT INITIATE FAILOVER WHEN USING OBSERVER.CONF


 
 1. Check what connect string observer using to connect to Primary and target standby
   1.1 DG configuration - I
     1.1.a. Primary configuration
     1.1.b. Standby configuration
   1.2 DG configuration - II
     1.2.a Primary configuration
     1.2.b Standby configuration
 2. TNS Alias on OBSERVER HOST
 3. Configure Wallet from the OBSERVER host
   3.1 Create wallet Key
   3.2 Make entry in SQLNET
   3.3 Reload all the listeners on all DG configuration.
 4. Create ObserverConfigFile
 5. Connect to dgmgrl and start the observer(s)
   5.1 From observer host
   5.2 Start the observer(s) for two DG broker configurations
   5.3 Check the OBSERVERs status
 6. Troubleshooting
  6.1. OBSERVER status shows UNKNOWN
   6.2. Starting OBSERVER failing with ORA-01017

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