Veritas Storage Foundation For Oracle RAC with EMC SRDF

Written by: Naveen Williams, Principal SQA Engineer

This whitepaper describes Symantec's Veritas Storage Foundation for Oracle RAC clustering and replication technologies. It examines EMC's SRDF data replication to disaster recovery sites and provides technical details on setting up a Disaster Recovery solution for Oracle Real Application Clusters (RAC). This technical discussion only considers synchronous mode SRDF with unidirectional configurations.

Disaster Recovery

Effective disaster recovery reestablishes missioncritical applications and associated data to normal operational states, usually at remote locations. Enterprise databases such as Oracle RAC are often essential components of missioncritical applications. To achieve disaster recovery typically requires replicating primary processing site data to remote sites using hardwarebased or hostbased replication methods.

• In hostbased replication, hosts write to local storage and transmit writes to the remote site using a network. Veritas Volume Replicator (VVR) is an example of hostbased replication.
• In hardwarebased replication, storage arrays typically write to a local disk and send data to a remote array. Some products providing hardwarebased replication are EMC's SRDF, Hitachi's True Copy, IBM's Metro Mirror, Network Appliance's Snap Mirror, and EMC's Mirror View.

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