HDFS Architecture

 HDFS architecture is divided into 2 types

1) HDFS architecture, responsible fro storage (NN, DN, SNN)

2) Map Reduce Architecture, responsible for processing ( JT  or RM & TT or NM)

Here,

NN: Name Node

DN: Data Node

SNN: Secondary name node

TT: Task Tracker

RM: Resource Manager

JT: Job Tracker

NM: Node manager

***

Hadoop Deamons

 Hadoop has 5 different deamon's

    1) Name node

    2) Data node

    3) Secondary name node

    4) Job Tracker (Until Hadoop 1.x) or Resource Manager from Hadoop 2.x

    5) Task Tracker (Until Hadoop 1.x) or Node manager from Hadoop 2.x

***