Causes of Data Loss Source: Disaster Recovery Journal Hardware & system errors Natural disasters 3% Software corruption 4% Computer viruses 7% Human errors 36% 49%
Real Application Clusters Continuous Availability for all Applications Data Guard Guaranteed Zero Data Loss Flashback Guaranteed Zero Data Loss Dynamic Reconfiguration Capacity on Demand without Interruption Online Redefinition Adapt to Change Online ASM Mirroring Storage Failure Protection Human Error Site Failures Storage/Net Failures Unplanned Downtime System Failures System Maintenance Planned Downtime Database Maintenance
A copy of a production database that you can use for disaster protection. You can update the standby database with redo logs from the production database in order to keep it current. If a disaster destroys the production database, you can activate the standby database and make it the new production database.
You can maintain the standby data in one of the following modes: