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Cassandra Design Patterns

Cassandra Design Patterns - Second Edition

By : Rajanarayanan Thottuvaikkatumana
3 (2)
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Cassandra Design Patterns

Cassandra Design Patterns

3 (2)
By: Rajanarayanan Thottuvaikkatumana

Overview of this book

If you are new to Cassandra but well-versed in RDBMS modeling and design, then it is natural to model data in the same way in Cassandra, resulting in poorly performing applications and losing the real purpose of Cassandra. If you want to learn to make the most of Cassandra, this book is for you. This book starts with strategies to integrate Cassandra with other legacy data stores and progresses to the ways in which a migration from RDBMS to Cassandra can be accomplished. The journey continues with ideas to migrate data from cache solutions to Cassandra. With this, the stage is set and the book moves on to some of the most commonly seen problems in applications when dealing with consistency, availability, and partition tolerance guarantees. Cassandra is exceptionally good at dealing with temporal data and patterns such as the time-series pattern and log pattern, which are covered next. Many NoSQL data stores fail miserably when a huge amount of data is read for analytical purposes, but Cassandra is different in this regard. Keeping analytical needs in mind, you’ll walk through different and interesting design patterns. No theoretical discussions are complete without a good set of use cases to which the knowledge gained can be applied, so the book concludes with a set of use cases you can apply the patterns you’ve learned.
Table of Contents (9 chapters)
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Distributed Counter pattern

Whenever there is a need to maintain counters in applications that need to be persisted and distributed, use the Cassandra Counter data type in the column families. The distributed counter value is 64-bit long, supporting only two operations, namely increment and decrement. This is much better than storing the counter values in RDBMS tables, caches, log files, text files, and so on. In the latest version of Cassandra, the performance of the Counter data type has been improved a lot, and many issues have been fixed to allow it to support very powerful use cases.

Motivations/solutions

The need to use counters exists in most applications. If the application and the database lives in just one node, there is no issue and everything is hunky-dory. The moment any one of these components gets distributed across multiple nodes, the pain begins. Then the need for synchronization arises, and the external synchronization tools such as Zookeeper come into the solution stack...

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