Oracle DBA RAC Interview Questions and Answers - 1
What is RAC cluster?
RAC cluster is a database with a shared cache architecture that overcomes the limitations of traditional shared nothing and shared disk approaches.
It is a key component of Oracle’s private cloud architecture.
What is Global Services Daemon (GSD)?
GSD runs on each node and is not an Oracle background process.
This process performs administrative tasks, such as startup and shutdown, based on the requests from different clients, such as DBCA and enterprise manager.
What is ACFS?
ACFS provides an Oracle Home shared file system or a general purpose clustered file system on ASM storage.
It needs ASM Dynamic Volume Manager (ADVM) to communicate to the operating system.
What is rolling upgrade?
Rolling upgrade refers to the software upgrading while database is still functional without bringing the database down for upgrade.
This is the new feature of Oracle 11g.
What components are shared in RAC?
A RAC setup shares datafiles, control files, SP files, redo log files; therefore, these files must be stored in the cluster aware shared storage.
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