Oracle Dataguard ensures high availability, data protection, and disaster recovery for enterprise data. Data Guard provides a comprehensive set of services that create, maintain, manage, and monitor one or more standby databases to enable production Oracle databases to survive disasters and data corruptions. Data Guard maintains these standby databases as transactionally consistent copies of the production database. Then, if the production database becomes unavailable because of a planned or an unplanned outage, Data Guard can switch any standby database to the production role, minimizing the downtime associated with the outage. Data Guard can be used with traditional backup, restoration, and cluster techniques to provide a high level of data protection and data availability.

this is step by step to configure ODG on ASM configuration (copy this artikel to notepad or editor to easy read ):

Prereq :

– 2 virtual machine(DBSERVER and DBSERVERDRC) with OEL 5.5 and Oracle database 10gR2 (ASM Storage : +DATA and +FRA).

+DATA for database file and +FRA for recovery area.

– Database with SID : “blackowl” are configured on DBSERVER and at DBSERVERDRC just software oracle only

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