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As you know one of the high availability solution is Data Guard. My dear friends Emre Baransel and Nassyam Basha have been published one new book about Data Guard product.

Before start, let me remind you some information about Oracle Data Guard:

Oracle Data Guard provides the management, monitoring, and automation software to create and maintain one or more standby databases to protect Oracle data from failures, disasters, human error, and data corruptions while providing high availability for mission critical applications. Data Guard is included with Oracle Database Enterprise Edition.

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

Oracle Data Guard can be deployed to maintain standby databases at a secondary site. These standby databases are maintained as synchronized copies of the production database.

If the production database becomes unavailable because of a planned or an unplanned outage, Data Guard can switch the standby database to the production role, thus minimizing the downtime associated with the outage, and preventing any data loss.

Those lines are from Oracle® Data Guard Concepts and Administration guide. You can find more details at that guide.

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