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You're reading from  Real-time Analytics with Storm and Cassandra

Product typeBook
Published inMar 2015
Reading LevelIntermediate
Publisher
ISBN-139781784395490
Edition1st Edition
Languages
Java
Tools
StormCassandra
Concepts
Data Processing
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Author (1)
Shilpi Saxena
Shilpi Saxena
author image
Shilpi Saxena

Shilpi Saxena is an IT professional and also a technology evangelist. She is an engineer who has had exposure to various domains (machine to machine space, healthcare, telecom, hiring, and manufacturing). She has experience in all the aspects of conception and execution of enterprise solutions. She has been architecting, managing, and delivering solutions in the Big Data space for the last 3 years; she also handles a high-performance and geographically-distributed team of elite engineers. Shilpi has more than 12 years (3 years in the Big Data space) of experience in the development and execution of various facets of enterprise solutions both in the products and services dimensions of the software industry. An engineer by degree and profession, she has worn varied hats, such as developer, technical leader, product owner, tech manager, and so on, and she has seen all the flavors that the industry has to offer. She has architected and worked through some of the pioneers' production implementations in Big Data on Storm and Impala with autoscaling in AWS. Shilpi has also authored Real-time Analytics with Storm and Cassandra (https://www.packtpub.com/big-data-and-business-intelligence/learning-real-time-analytics-storm-and-cassandra) with Packt Publishing.
Read more about Shilpi Saxena

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The nodetool commands

The nodetool command in Cassandra is the most handy tool in the hands of a Cassandra administrator. It has all the tools and commands that are required for all types of situational handling of various nodes. Let's look at a few widely used ones closely:

  • Ring: This command depicts the state of nodes (normal, down, leaving, joining, and so on). The ownership of the token range and percentage ownership of the keys along with the data centre and rack details is as follows:

    bin/nodetool -host 192.168.1.54 ring

    The output will be something like this:

    192.168.1.54 datacenter1rack1 Up    Normal 755.25 MB 50.00% 0
192.168.1.51 datacenter1rack1 Up    Normal 400.62 MB 0.00%  42535295865117307932921825928971026431
192.168.1.55 datacenter1rack1 Down    Normal 793.06 MB 25.00%  42535295865117307932921825928971026432
192.168.1.56 datacenter1rack1 Up    Normal 793.06 MB 25.00%  85070591730234615865843651857942052864

  • Join: This is the option you can use with nodetool, which needs to...

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Real-time Analytics with Storm and Cassandra
Published in: Mar 2015Publisher: ISBN-13: 9781784395490
© 2015 Packt Publishing Limited All Rights Reserved

Author (1)

author image
Shilpi Saxena

Shilpi Saxena is an IT professional and also a technology evangelist. She is an engineer who has had exposure to various domains (machine to machine space, healthcare, telecom, hiring, and manufacturing). She has experience in all the aspects of conception and execution of enterprise solutions. She has been architecting, managing, and delivering solutions in the Big Data space for the last 3 years; she also handles a high-performance and geographically-distributed team of elite engineers. Shilpi has more than 12 years (3 years in the Big Data space) of experience in the development and execution of various facets of enterprise solutions both in the products and services dimensions of the software industry. An engineer by degree and profession, she has worn varied hats, such as developer, technical leader, product owner, tech manager, and so on, and she has seen all the flavors that the industry has to offer. She has architected and worked through some of the pioneers' production implementations in Big Data on Storm and Impala with autoscaling in AWS. Shilpi has also authored Real-time Analytics with Storm and Cassandra (https://www.packtpub.com/big-data-and-business-intelligence/learning-real-time-analytics-storm-and-cassandra) with Packt Publishing.
Read more about Shilpi Saxena

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