{"id":52245,"date":"2022-09-04T11:35:44","date_gmt":"2022-09-04T11:35:44","guid":{"rendered":"https:\/\/dbtut.com\/?p=52245"},"modified":"2022-09-04T11:36:29","modified_gmt":"2022-09-04T11:36:29","slug":"fast-start-failover-disabled","status":"publish","type":"post","link":"https:\/\/dbtut.com\/index.php\/2022\/09\/04\/fast-start-failover-disabled\/","title":{"rendered":"Fast Start Failover Disabled"},"content":{"rendered":"

We may request that Fast start Failover be disabled. We can do this disable process in 2 ways.<\/p>\n

Without using the FORCE option<\/h4>\n
SYNTAX\r\nDISABLE FAST_START FAILOVER;\r\n<\/pre>\n
This is how the system works when this command is run.<\/p>\n
The broker disables Fast-start Failover first in Target Standby Database and then in Primary Database. Writes this information to the Broker configuration file. Then it sends this information to all databases in Environment.<\/p>\n
Disable with FORCE option<\/h4>\n
SYNTAX \r\nDISABLE FAST_START FAILOVER FORCE;<\/pre>\n
In case the Primary Database does not communicate with the Fast-start Failover Target Standby Database, the operation of the system is as follows if this command is run on the Primary or other Standby Databases with the FORCE option.<\/p>\n
In whichever database it was run, it is disabled only in that database for the moment.<\/p>\n
It is only written to the Broker configuration file of the running database for the moment.<\/p>\n
It then sends this change to all Broker configurations that communicate with the Primary in the Environment.<\/p>\n
If the Primary Database does not communicate with the Fast-start Failover Target Standby Database, the operation of the system is as follows if this command is run on the Target Standby Database with the FORCE option.<\/p>\n
Fast-start Failover is disabled only in Target Standby Database. When the Target Standby Database reconnects with the Primary, the Primary Database is also disabled.<\/p>\n
In the light of this information, it would be best to run the Fast-start Failover disable command in either Primary or bystander Standby.<\/p>\n
Disable steps are below.<\/p>\n
1. Disable command is executed<\/p>\n
DGMGRL> disable fast_start failover;\r\nDisabled.\r\n<\/pre>\n
2. We check if it is disabled.<\/p>\n
DGMGRL> show configuration verbose\r\n\r\nConfiguration - Broker_Configuration\r\n\r\n  Protection Mode: MaxPerformance\r\n  Databases:\r\n    primary - Primary database\r\n    standby - Physical standby database\r\n    logical - Logical standby database\r\n\r\n  Properties:\r\n    FastStartFailoverThreshold      = '100'\r\n    OperationTimeout                = '30'\r\n    FastStartFailoverLagLimit       = '900'\r\n    CommunicationTimeout            = '180'\r\n    ObserverReconnect               = '15'\r\n    FastStartFailoverAutoReinstate  = 'TRUE'\r\n    FastStartFailoverPmyShutdown    = 'TRUE'\r\n    BystandersFollowRoleChange      = 'ALL'\r\n    ObserverOverride                = 'FALSE'\r\n    ExternalDestination1            = ''\r\n    ExternalDestination2            = ''\r\n    PrimaryLostWriteAction          = 'CONTINUE'\r\n\r\nFast-Start Failover: DISABLED\r\n\r\nConfiguration Status:\r\nSUCCESS\r\n<\/pre>\n
OperationTimeout: It is the maximum time that the broker will wait to receive and set parameters that can be monitored with health check.<\/p>\n
CommunicationTimeout: Shows the broker’s waiting time before the network communication between databases in the broker configuration falls into timeout.<\/p>\n
3. We check the status of the Observer.<\/p>\n
\"\"<\/p>\n
Even if Fast-start Failover is disabled, the Observer will not be stopped automatically, it will remain idle until Fast-start Failover is enabled again.<\/p>\n
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We may request that Fast start Failover be disabled. We can do this disable process in 2 ways. Without using the FORCE option SYNTAX DISABLE FAST_START FAILOVER; This is how the system works when this command is run. The broker disables Fast-start Failover first in Target Standby Database and then in Primary Database. Writes this …<\/p>\n
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