Book Image

Apache Cassandra Essentials

By : Nitin Padalia
Book Image

Apache Cassandra Essentials

By: Nitin Padalia

Overview of this book

Apache Cassandra Essentials takes you step-by-step from from the basics of installation to advanced installation options and database design techniques. It gives you all the information you need to effectively design a well distributed and high performance database. You’ll get to know about the steps that are performed by a Cassandra node when you execute a read/write query, which is essential to properly maintain of a Cassandra cluster and to debug any issues. Next, you’ll discover how to integrate a Cassandra driver in your applications and perform read/write operations. Finally, you’ll learn about the various tools provided by Cassandra for serviceability aspects such as logging, metrics, backup, and recovery.
Table of Contents (14 chapters)
Apache Cassandra Essentials
About the Author
About the Reviewers

Data types

Cassandra has five categories or data types:

  1. Native types: These are built-in types in Cassandra. For each type there is a keyword to define.

  2. Collection types: These types can store a group of native type elements. There are three categories—set, list, and map.

  3. Tuple types: Tuple types can store a fixed length group of elements in a column similar to user-defined types, except that the tuple element field has no names. Hence, the ordering should be the same as during inserting a record in the order they are defined at table creation time. The following is an example of creating a column family with a tuple type:

    CREATE TABLE user_reviews (
    useriduuid PRIMARY KEY,
    review frozen<tuple<text, text, decimal>>
    INSERT INTO user_reviews (userid, review ) VALUES ( 9b02528d-75af-41d9-866e-75d189f57118, ('awesome', 'This App is awesome', 4.8))
    // Below will raise error due to wrong insertion order
    INSERT INTO user_reviews (userid, review ) VALUES ( 9b02528d-75af-41d9-866e-75d189f57118...