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You're reading from Data Lake for Enterprises

Product typeBook

Published inMay 2017

Reading LevelIntermediate

PublisherPackt

ISBN-139781787281349

Edition1st Edition

Languages

Java

Tools

Kafka Hadoop

Concepts

Data Processing

Authors (3):

Vivek Mishra

Tomcy John

Pankaj Misra

View More author details

Nodes in Elasticsearch

As detailed earlier, a node in Elasticsearch is one of the servers forming the cluster. A node in a cluster can be configured to work as different node types as follows:

Master node
Data node
Client node

Elasticsearch - master node

Any node in a cluster is eligible to become the master node if the node.master property is set to true in the elasticsearch.yml file. Once the master node is elected automatically by the cluster, this node is entrusted with some key responsibilities, as follows:

Allocate of shards across various nodes within the cluster.
Create and delete indexes.
Broadcast the cluster state to all the nodes in the cluster and in turn receives confirmations from each of those nodes back.
Take necessary actions when a node joins or leaves the cluster.
Ping all the nodes periodically and all nodes ping back the master periodically. If the master fails due to any reason, one of the other master-eligible nodes is elected as master by the cluster.

Elasticsearch - data node...

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Data Lake for Enterprises

Published in: May 2017Publisher: PacktISBN-13: 9781787281349

Authors (3)

Vivek Mishra

Vivek Mishra is an IT professional with more than nine years of experience in various technologies like Java, J2ee, Hibernate, SCA4J, Mule, Spring, Cassandra, HBase, MongoDB, REDIS, Hive, Hadoop. He has been a contributor for open source like Apache Cassandra and lead committer for Kundera(JPA 2.0 compliant Object-Datastore Mapping Library for NoSQL Datastores like Cassandra, HBase, MongoDB and REDIS). Mr Mishra in his previous experience has enjoyed long lasting partnership with most recognizable names in SCM, Banking and finance industries, employing industry standard full software life cycle methodologies Agile and SCRUM. He is currently employed with Impetus infotech pvt. ltd. He has undertaken speaking engagements in cloud camp and Nasscom Big data seminar and is an active blogger and can be followed at mevivs.wordpress.com
Read more about Vivek Mishra

Tomcy John

Tomcy John lives in Dubai (United Arab Emirates), hailing from Kerala (India), and is an enterprise Java specialist with a degree in Engineering (B Tech) and over 14 years of experience in several industries. He's currently working as principal architect at Emirates Group IT, in their core architecture team. Prior to this, he worked with Oracle Corporation and Ernst & Young. His main specialization is in building enterprise-grade applications and he acts as chief mentor and evangelist to facilitate incorporating new technologies as corporate standards in the organization. Outside of his work, Tomcy works very closely with young developers and engineers as mentors and speaks at various forums as a technical evangelist on many topics ranging from web and middleware all the way to various persistence stores.
Read more about Tomcy John

Pankaj Misra

Pankaj Misra has been a technology evangelist, holding a bachelor's degree in engineering, with over 16 years of experience across multiple business domains and technologies. He has been working with Emirates Group IT since 2015, and has worked with various other organizations in the past. He specializes in architecting and building multi-stack solutions and implementations. He has also been a speaker at technology forums in India and has built products with scale-out architecture that support high-volume, near-real-time data processing and near-real-time analytics.
Read more about Pankaj Misra

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Nodes in Elasticsearch

Elasticsearch - master node

Elasticsearch - data node...

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