Delve into Big Data essentials, explore data types, and gain insights into Hadoop components like YARN, MapReduce, HDFS, and Spark. Discover foundations to excel in the growing Big Data field.

data.tar.gz

HADOOP_HOME

JAVA_HOME

HDFS_NAMENODE_USER

HDFS_DATANODE_USER

HDFS_SECONDARYNAMENODE_USER

YARN_RESOURCEMANAGER_USER

YARN_NODEMANAGER_USER

HADOOP_CONF_DIR

ZK_HOME

PIG_HOME

AvroWriteExample

AvroReadExample

AvroGeneratedCodeReadExample

AvroGeneratedCodeWriteExample

AvroRPCExample

ParquetReadExampleJob

ParquetWriteExampleJob

ParquetAvroReadExampleJob

ParquetAvroWriteExampleJob

ParquetProjectionReadExampleJob

SequenceFileReadExampleJob

SequenceFileWriteExampleJob

SequenceFileSyncPointExampleJob

TestCarMapperJob

TestCarReducerJob

CarCounterMrProgramJob

MyLiveAppJob

DataNodeWebUI2

YarnWebUI

YarnWebUI-copy

YarnWebUI-copy-copy

JHS-UI

Spark-UI-copy

Spark-History-Server-UI-3

This course offers a one-of-a-kind rich and interactive experience to learn the fundamentals and basics of Big Data. Throughout this course, you will have plenty of opportunities to get your hands dirty with functioning Hadoop clusters.

You will start off by learning about the rise of Big Data as well as the different types of data like structured, unstructured, and semi-structured data. You will then dive into the fundamentals of Big Data such as YARN (yet another resource manager), MapReduce, HDFS (Hadoop Distributed File System), and Spark.

By the end of this course, you will have the foundations in place to start working with Big Data, which is a massively growing field.

Introduction to Big Data and Hadoop

# HDFS in Practice II

In the previous lesson, we looked at some client commands. Now we'll briefly explore admin and daemon commands offered by the hdfs command line utility.

# Startup Hadoop deamons
./DataJek/startHadoop.sh

# Retrieve the topology of the cluster
hdfs dfsadmin -printTopology

# Get an admin report
hdfs dfsadmin -report

# Get the status of a Datanode
hdfs dfsadmin -getDatanodeInfo localhost:9867

# Retrieve the FS image
hdfs dfsadmin -fetchImage /Downloads

# Attempt to start the Datanode
hdfs datanode

+ Serious production deployments of Hadoop are deployed on a cluster of machines with a planned topology. HDFS looks at the topology of the Datanodes when placing the data block's replicas. We can examine the topology with this following command:

  ```shell
  hdfs dfsadmin -printTopology
  ```


This lesson shows example usage of HDFS admin and daemon commands.

HDFS in Practice II

Hadoop

YARN

Map Reduce

HDFS

Spark

Input & Output Formats

Misc

Quiz

Reference: Replication

Reference: Partitioning

Reference: Transactions

Reference: Issues in Distributed Systems

HDFS in Practice II

HDFS in Practice II