Book Image

Learning Cassandra for Administrators

By : Vijay Parthasarathy
Book Image

Learning Cassandra for Administrators

By: Vijay Parthasarathy

Overview of this book

<p>Apache Cassandra is a massively scalable open source NoSQL database. Cassandra is perfect for managing large amounts of structured, semi-structured, and unstructured data across multiple data centers and the cloud. Cassandra delivers linear scalability and performance across many commodity servers with no single point of failure.<br /><br />This book starts by explaining how to derive the solution, basic concepts, and CAP theorem. You will learn how to install and configure a Cassandra cluster as well as tune the cluster for performance. After reading the book, you should be able to understand why the system works in a particular way, and you will also be able to find patterns (and/or use cases) and anti-patterns which would potentially cause performance degradation. Furthermore, the book explains how to configure Hadoop, vnodes, multi-DC clusters, enabling trace, enabling various security features, and querying data from Cassandra.<br /><br />Starting with explaining about the trade-offs, we gradually learn about setting up and configuring high performance clusters. This book will help the administrators understand the system better by understanding various components in Cassandra’s architecture and hence be more productive in operating the cluster. This book talks about the use cases and problems, anti-patterns, and potential practical solutions as opposed to raw techniques. You will learn about kernel and JVM tuning parameters that can be adjusted to get the maximum use out of system resources.<br /><br /><br /></p>
Table of Contents (14 chapters)

Monitoring tools


Monitoring Cassandra is one of the most important tasks as an administrator. Cassandra provides a lot of useful metrics to help us understand a problem way ahead of time. For example, if your compaction time is constantly increasing, the SSTable size is increasing in exponential sizes, or if memory usage is increasing without the GC cleaning most of it, it is important for us to know about it and address the same.

DataStax OpsCenter

DataStax OpsCenter simplifies Cassandra monitoring and the management of Cassandra clustering the data infrastructure. OpsCenter is included as part of the DataStax distribution. It allows administrators, architects, and developers to manage, monitor, and control even the most complex database workloads with point-and-click ease from a centralized web browser. More details can be found at http://www.datastax.com/.

OpsCenter provides a good UI functionality of the nodetool command and collects the JMX monitoring data, and plots the data in intuitive...