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Introduction

In this Apache Cassandra tutorial you will learn Cassandra from the basics to get a clear idea of why Cassandra is such a powerful NoSQL database system. Cassandra is a high performance, high availability and highly scalable distributed database that works well with structured, semi-structured and unstructured data. For structured data we have the RDBMS, so a database like Cassandra is mainly used for storing and manipulating unstructured data.

Apache Cassandra is a highly scalable, high-performance distributed database designed to handle large amounts of data across many commodity servers, providing high availability with no single point of failure. It is a type of NoSQL database. Let us first understand what a NoSQL database does.

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Recommended audience

This Cassandra tutorial can be beneficial to anybody who wants to learn NoSQL databases. Software developers, database administrators, architects, managers can take this Cassandra tutorial as a first step to learn Cassandra and excel in their careers.

Prerequisites

There are no prerequisites to learn Cassandra from this Cassandra tutorial. If you have a basic knowledge of databases, then it is good.

What is Apache Cassandra?

Before we learn Cassandra, let us first understand the difference between a NoSQL database and a relational database through this table:

Comparison criteria NoSQL database Relational database
Type of data handled Mainly unstructured data Only structured data
Volume of data High Volume Low Volume
Type of transactions handled Simple Complex
Single point of failure No Yes
Data arriving from Many locations A few locations

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Apache Cassandra is on open source powerful, distributed NoSQL database that does not have a single point of failure and is extremely scalable and highly available. Cassandra was originally developed at Facebook and later open sourced and is currently part of the Apache Software Foundation.

What is a NoSQL database?

A NoSQL or Not Only SQL is a set of databases that provide a way to store and retrieve data that is not in the standard tabular format followed by relational databases. The NoSQL databases of which Cassandra is a very popular database share some common features and attributes. The NoSQL databases do not have any schema, they support easy replication of data, they have a simple API, they do not exhibit the ACID properties but are eventually consistent and finally last but not the least, they can handle huge volumes of data.

 Some of the properties of a NoSQL database include:

  • It has a simple design
  • It is scalable horizontally
  • It has finer control over availability.

Why is Apache Cassandra so widely used?

In this section of the Cassandra tutorial we list some of the major points why Cassandra is such a widely used NoSQL database.

  • It is a high-performance, high availability database
  • It is extremely fault-tolerant, scalable and consistent
  • It is high-speed thanks to it being a column-oriented database
  • Its architecture is based on Google’s Bigtable & Amazon’s Dynamo.
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Features of Cassandra

Here in this section of the Cassandra tutorial we will discuss some of the top features of Cassandra

  • Cassandra is highly scalable meaning you can have additional hardware for accommodating more customers and data
  • Cassandra does not have a single point of failure and it has an always on architecture
  • It has fast linear performance which means you can increase the throughput by increasing the number of nodes in the cluster
  • It has a highly flexible data storage meaning all formats of data can be stored including structured, semi-structured and unstructured
  • It allows for easy data distribution by providing the flexibility to distribute data by replicating it across multiple data centers
  • Cassandra supports the ACID compliance which stands for Atomicity, Consistency, Isolation, Durability
  • It performs blazing fast writes without sacrificing the read efficiency.

Applications of Apache Cassandra

Apache Cassandra is one of the most widely used NoSQL databases. Here we list some of the top applications of Cassandra.

  • It is extensively used for monitoring and tracking of applications
  • It is used in web analytics which are heavy write systems
  • It is deployed for social media analysis for providing suggestions to customers
  • It is used in retail applications for product catalogue look ups and inputs
  • It is extensively used as the database for mobile messaging services

Why should you learn Cassandra?

Cassandra is a top NoSQL database and it is finding more and more users with each passing day. Since we are living in a world of big data, Cassandra is finding huge acceptance since it was built for big data. Also a lot of the organizations are moving from the traditional relational database systems to NoSQL databases and thus Cassandra is their natural choice. All this means that the job market for Cassandra is just heating up and the salaries for Cassandra professionals are among the best in the big data domain. All these are compelling reasons for you to learn Cassandra and excel in your career.

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"2 Responses on Cassandra Tutorial"

  1. tekslate says:

    Thanks for sharing the information, it is very helpful.

  2. Soniya says:

    Thanks for sharing….This Teaches me what i need to know 🙂

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