2.1. RAC components2.1.1. Oracle ClusterwareOracle Clusterware architectureOracle Cluster RegistryCluster Synchronization Services (CSS)Oracle Clusterware stackCluster interconnectGigabit EthernetInfiniband technologyVirtual Interface or Virtual IP2.2. Real Application Cluster2.3. Background processes in RACLMSLMONLMDLCKDIAG2.4. Database files in RAC2.4.1. Server parameter file2.4.2. Datafiles2.4.3. Control files2.4.4. Online redo log files2.4.5. Archived redo log files2.4.6. Other files2.5. Maintaining read consistency in RACUndo management2.6. Cache fusionResource modeResource role2.7. Global Resource DirectoryDatabase block address (DBA)LocationModeRoleSystem change numberPast imageCurrent image2.8. Mastering of resources2.9. Lock management2.10. Multi-instance transaction behaviorRead/read behaviorRead/read behavior with no transferRead/read behavior with transferRead/write behaviorWrite/write behaviorWrite/read behaviorWrite-to-disk behavior2.11. Recovery2.11.1. Cache recovery2.11.2. Transaction recoveryFast-start on demandFast-start parallel rollback2.11.3. Online block recovery2.12. Conclusion