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Oracle database failover with MetroCluster
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Metrocluster is an ONTAP feature that can protect your Oracle databases with RPO=0 synchronous mirroring across sites, and it scales up to support hundreds of databases on a single MetroCluster system.
It's also simple to use. The use of MetroCluster does not necessarily add to or change any best ractices for operating a enterprise applications and databases.
The usual best practices still apply, and if your needs only require RPO=0 data protection then that need is met with MetroCluster. However, most customers use MetroCluster not only for RPO=0 data protection, but also to improve RTO during disaster scenarios as well as provide transparent failover as part of site maintenance activities.