Ctrlk
For the complete documentation index, see llms.txt. This page is also available as Markdown.

Apache Hadoop

Workshop - Apache Hadoop

x

x

Start Container

Hopefully .. you've completed the Setup: Apache Hadoop

  1. To start the container enter the following:

docker start -ai AHW

Once the Docker shell opens, just type restart to restart all processes.

NameNode

The NameNode is the master node and central component of Hadoop's Distributed File System (HDFS). It acts as the "brain" of the file system.

  1. Log into NameNode:

http://localhost:9870localhost

  1. You can upload files to the root directory:

Browse file system

YARN

YARN acts as the operating system for Hadoop clusters by separating resource management from job scheduling and monitoring, allowing multiple data processing engines like MapReduce, Spark, Hive, and others to run simultaneously on the same cluster.

  1. Log into YARN:

http://localhost:8095localhost

DataNode

A DataNode in Hadoop is a worker node in the Hadoop Distributed File System (HDFS) that stores the actual data blocks and serves read/write requests from clients. DataNodes communicate regularly with the NameNode through heartbeat messages to report their health status and the blocks they're storing.

They handle data replication by creating multiple copies of blocks across different nodes to ensure fault tolerance, and they perform block verification to detect corruption. DataNodes also participate in data pipeline operations during file writes and coordinate with other DataNodes to maintain data integrity and availability across the distributed cluster.

  1. Log into the DataNode:

http://localhost:9864localhost

  1. Useful for troubleshooting the Node.

DataNode

x

x

PreviousApache Hadoop
NextJupyter Notebook

Last updated

Was this helpful?