Podcast
Questions and Answers
What is the primary purpose of data replication in a distributed database system?
What is the primary purpose of data replication in a distributed database system?
- To increase the complexity of the distributed database design
- To eliminate query processing and optimization issues
- To centralize data access points and improve response time
- To remove single points of failure and improve system availability (correct)
How does data replication contribute to performance improvement in distributed databases?
How does data replication contribute to performance improvement in distributed databases?
- By adding complexity to query processing and optimization
- By centralizing the data access points
- By maintaining only one copy of each data item
- By localizing most of the access, which reduces response time (correct)
What is one of the challenges posed by data replication in distributed database systems?
What is one of the challenges posed by data replication in distributed database systems?
- Reduced system availability
- Keeping different copies synchronized (correct)
- Increased response time
- Decreased scalability
What is the execution model for replicated data items in a distributed database system?
What is the execution model for replicated data items in a distributed database system?
What is the purpose of having multiple copies of data items as part of their operational specifications?
What is the purpose of having multiple copies of data items as part of their operational specifications?
What are the key benefits of data replication in a distributed database system?
What are the key benefits of data replication in a distributed database system?
In a replicated database, what is the responsibility of the replica control protocol?
In a replicated database, what is the responsibility of the replica control protocol?
What does one-copy equivalence (single system image) refer to in a replicated database?
What does one-copy equivalence (single system image) refer to in a replicated database?
What characterizes a partially replicated database?
What characterizes a partially replicated database?
What does strong consistency criteria ensure in a replicated database?
What does strong consistency criteria ensure in a replicated database?
In a replicated database, what characterizes centralized update techniques?
In a replicated database, what characterizes centralized update techniques?
What is the responsibility of the update propagation decision in a replicated database?
What is the responsibility of the update propagation decision in a replicated database?
What is the impact of a mutually consistent state in a replicated database?
What is the impact of a mutually consistent state in a replicated database?
What types of transactions are considered global in a partially replicated database?
What types of transactions are considered global in a partially replicated database?
What does the degree of replication transparency refer to in a replicated database?
What does the degree of replication transparency refer to in a replicated database?
What are the techniques characterized as distributed update techniques in a replicated database?
What are the techniques characterized as distributed update techniques in a replicated database?
