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What is Oracle RAC and Its Advantages || Standalone Vs RAC 3-Tier Architecture || RAC basics:
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Standalone Vs RAC 3-Tier Architecture

The Oracle RAC Architecture
Typical hardware architecture

Benefits or Advantages
High availability:
The shared-everything architecture guarantees that node failures do not imply loss of service. The remaining nodes of the cluster will perform crash recovery for the failed instance, guaranteeing availability of the database.
Making Failover Seamless:
 Transparent Application Failover
 Fast Connect Failover
Load Balancing
 SCAN


Scalability:
Multiple nodes allow an application to scale beyond the limits imposed by single-node databases
 Vertical Scaling:
 Horizontal Scaling:

Manageability:
Multiple databases can be consolidated into a RAC cluster.
 The Resource Manager:
 Instance Caging:
 Workload management:

Reduced cost of ownership:
RAC can be deployed on industry standard hardware, offsetting the licensing cost with lower hardware cost.
 Service-Level Agreements
 Additional Hardware Cost
 Additional License Cost

#RAC #RACAdvantages #SCAN #LoadBalancing #oracle #database

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