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Distributed Databases
Data replication is favored where most process requests are read-only and where the data are relatively static.
True
Correct Answer:
True
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Distributed Databases
With asynchronous technology, if any copy of a data item is updated anywhere on the network, the same update is immediately applied to all other copies or it is aborted.
The semijoin approach saves network traffic.
Replication may use either synchronous or asynchronous distributed database technologies, although asynchronous technologies are more typical in a replicated environment.
The cost to perform a snapshot refresh may depend on whether the snapshot is simple or complex.
Each site (or node) in a distributed system is subject to the same types of failure as in a centralized system.
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