Give two reasons why data should be duplicated over a network of data centres that are geographically separated. As previously stated, log entries are utilised to facilitate replication in centralised...

Give two reasons why data should be duplicated over a network of data centres that are geographically separated.

As previously stated, log entries are utilised to facilitate replication in centralised databases. What is the current state of affairs?

In what ways are replication in centralised databases and replication in parallel/distributed databases distinct from one another?