?What is Cache Fusion in Oracle RAC, and how does it impact database performance

Cache Fusion is a critical feature of Oracle RAC that ensures data consistency across multiple database instances in the cluster. It allows instances to share data blocks directly in memory rather than going to disk. While Cache Fusion enhances data consistency, it can also introduce contention in highly concurrent environments. Understanding and tuning Cache Fusion is crucial for optimizing RAC performance.

?What are the key components of Oracle RAC architecture, and how do they work together

The key components of Oracle RAC architecture include Oracle instances, Clusterware (e.g., Oracle Clusterware), VIP (Virtual IP) addresses, Cluster Interconnect, and shared storage. Instances run on different servers, and Clusterware manages cluster membership and resources. VIP addresses ensure seamless client connections, while the Cluster Interconnect facilitates high-speed communication between nodes. Shared storage allows data to be shared across instances, enhancing scalability and availability in RAC. These components work together to create a robust and highly available database environment.

Oracle RAC Internals

Track :

Computer Science

Lessons no : 16

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What will you learn in this course?

Understand Oracle RAC architecture, components, and clustering mechanisms for high availability and scalability
Analyze Oracle RAC internals, including cache fusion, voting disks, and inter-node communication protocols
Configure and optimize Oracle RAC environments for performance, reliability, and disaster recovery
Troubleshoot common Oracle RAC issues related to node communication, cache fusion, and clusterware failures

Implement best practices for Oracle RAC installation, patching, and maintenance in enterprise environments
Monitor Oracle RAC performance using Automatic Workload Repository (AWR), Active Session History (ASH), and other tools
Secure Oracle RAC clusters by managing user access, network security, and data protection strategies
Apply advanced techniques for Oracle RAC scalability, load balancing, and resource management

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Lessons | 16