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Hard Partitioning RAC and RAC One Node with Oracle VM

Oracle has a wide variety of high availability solutions for databases, applications and virtualization that offer different levels of availability. Hard and soft partitioning with Oracle VM can be used with Oracle RAC, RAC One Node, DataGuard and Application Server Guard to provide an additional layer of high availability with total control over Oracle CPU licensing costs.
 
Oracle VM's high availability features are complementary with Oracle's high availability solutions for databases, Fusion Middleware and applications. For example, Oracle VM high availability (HA) detects and responds to catastrophic Oracle VM Server failures by restarting virtual machines, RAC nodes, RAC One Nodes, DataGuard and/or Application Server Guard nodes on a live Oracle VM Server. Oracle VM Live Migration is used to eliminate planned downtime by migrating running virtual machines from one Oracle VM Server to another Oracle VM Server during a maintenance event, i.e. for repairs or an upgrade. Hard and soft partitioning with Oracle VM can be used with RAC, RAC One Node, DataGuard and Application Server Guard to provide and additional layer of high availability with total control over Oracle CPU licensing costs.
 
RAC is one of Oracle’s database high availability solutions that offers operational continuity in the event of server and hardware failure. If one RAC node in a multi node RAC cluster fails, the Oracle database would continue to run without disruption of service. An Oracle 11g Database R2 feature named RAC One Node, also offers database high availability in the event of catastrophic failure, with a single node architecture. Both RAC and RAC One Node are certified and supported with Oracle VM. Hard partitioning with Oracle VM can be used with RAC and RAC One Node to provide database high availability with total control over Oracle CPU licensing costs.
 
Figure 6 shows how hard partitioning with Oracle VM can be used with RAC to gain total control over processor licensing costs.
 
Hard Partition RAC
 
If reducing costs, Database high availability and Live migration is a requirement, RAC One node with Omotion can be used as live fail-over option on Oracle VM without incurring additional CPU license penalties. RAC One Node is certified and supported with Oracle VM. RAC One Node continually monitors the status of a Database running inside a virtual machine, and if the RAC One Node instance experiences a catastrophic failure, RAC One Node will restart the affected database in place or on another standby RAC One Node virtual machine. Following the Oracle Software Investment Guide (SIG) failover rule, a standby RAC One Node virtual machine can run an Oracle Database without additional licensing fees for up to 10 days in any calendar year.
 
Figure 7 shows how hard partitioning with Oracle VM can be used with RAC One Node to gain total control over processor licensing costs.
 
Hard Partition RAC ONE Node
 
Note: The 10-day rule applies to Oracle products using failover technologies in an active/passive cluster. With Oracle products in an active/passive cluster, if a primary node fails, failover to a second node for up to 10 days in any calendar year is permitted without additional license fees.

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