DataGuard 12.1 – FastSync and FarSync

From 12c onwards, Data Guard maximum availability supports the use of the noaffirm redo transport parameter. It enables Maximum Availability protection mode at larger distances with less performance impact then before. In “LogXptMode=FASTSYNC” mode, standby database returns receipt acknowledgment to its primary database as soon as redo is received in memory. The standby database does not wait for the Remote File Server (RFS) to write to a standby redo log file.

This is how FastSync set up: Continue reading → DataGuard 12.1 – FastSync and FarSync

ORA-20079: full resync from primary database is not done with ORA-17627, RMAN-20051

Whenever a structural change is made on the primary, attempts to resync from the primary using db_unique_name during the standby RMAN backups, it fails with following error.
Db-unique-name for all databases participating in the Data Guard configuration has been configured. Continue reading → ORA-20079: full resync from primary database is not done with ORA-17627, RMAN-20051

Oracle Data Guard 12cR1 with Data Guard Broker

The purpose of this blog is to guide you through configuring Oracle Data Guard Fast-Start Failover (FSFO) using Data guard broker with physical standby database.

Oracle Data Guard

Oracle Data Guard is one of the software solutions provided by Oracle Corporation to maximize high availability of Oracle databases. Oracle Data Guard maintains one or many secondary databases as alternatives to the primary production database. Continue reading → Oracle Data Guard 12cR1 with Data Guard Broker

Oracle 12c – SYS/SYSTEM accounts are incorrectly listed in DBA_USERS_WITH_DEFPWD

After creation of a new 12c database, the SYS and SYSTEM accounts are listed in DBA_USERS_WITH_DEFPWD even though the accounts were created with non-default passwords. Setting the same passwords again with ALTER USER correctly recognises that the accounts do not have default passwords. Continue reading → Oracle 12c – SYS/SYSTEM accounts are incorrectly listed in DBA_USERS_WITH_DEFPWD