HDFS Flashcards by Nguyễn Tuân | Brainscape

Q

HDFS (Hadoop Distributed File System)

A

Foundation for Hadoop Ecosystem:

Scalability
Reliability (Replication for fault tolerance and Customized reading to handle variety of file types)

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Q

Two key components of HDFS

A

NameNode for metadata
DataNode for block storage

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Q

NameNode

A

The NameNode coordinates operations
Keeps track of file name, location in directory, etc.
Mapping of contents on DataNode.

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Q

DataNode

A

DataNode stores file blocks
Listens to NameNode for block creation, deletion, replication

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