CCA-500 · Question #80
How does HDFS Federation help HDFS Scale horizontally?
The correct answer is D. HDFS Federation reduces the load on any single NameNode by using the multiple, independent NameNode. HDFS FederationIn order to scale the name service horizontally, federation uses multiple independent Namenodes/Namespaces. The Namenodes are federated, that is, the Namenodes are independent and don't require coordination with each other. The datanodes are used as common…
Question
How does HDFS Federation help HDFS Scale horizontally?
Options
- AHDFS Federation improves the resiliency of HDFS in the face of network issues by removing the
- BHDFS Federation allows the Standby NameNode to automatically resume the services of an active
- CHDFS Federation provides cross-data center (non-local) support for HDFS, allowing a cluster administrator
- DHDFS Federation reduces the load on any single NameNode by using the multiple, independent NameNode
How the community answered
(35 responses)- A3% (1)
- B9% (3)
- C14% (5)
- D74% (26)
Explanation
HDFS FederationIn order to scale the name service horizontally, federation uses multiple independent Namenodes/Namespaces. The Namenodes are federated, that is, the Namenodes are independent and don't require coordination with each other. The datanodes are used as common storage for blocks by all the Namenodes. Each datanode registers with all the Namenodes in the cluster. Datanodes send periodic heartbeats and block reports and handles commands from the Namenodes.
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