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Explain the hdfs architecture and list the various hdfs daemons in hdfs cluster?
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Answer Posted / Mayank Kumar
HDFS (Hadoop Distributed File System) architecture is designed to store large datasets on commodity hardware. It consists of two main types of nodes: NameNode and DataNodes. The NameNode manages the file system namespace and is the centralized metadata repository for HDFS. DataNodes are responsible for storing and serving data blocks. Other important daemons in an HDFS cluster include SecondaryNameNode, which helps reduce I/O load on the main NameNode by performing tasks such as checkpointing, and JournalNode, which is used to store edit logs for the NameNode.
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