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Mastering Apache Cassandra 3.x - Third Edition
book

Mastering Apache Cassandra 3.x - Third Edition

by Aaron Ploetz, Tejaswi Malepati
October 2018
Beginner to intermediate content levelBeginner to intermediate
348 pages
10h
English
Packt Publishing
Content preview from Mastering Apache Cassandra 3.x - Third Edition

Snitch

Cassandra uses a component known as the snitch to direct read and write operations to the appropriate nodes. When an operation is sent to the cluster, it is the snitch's job (Williams 2012) to determine which nodes in specific data centers or racks can serve the request.

Most snitches that ship with Apache Cassandra are both data center- and rack-aware. That is, they are capable of viewing (predetermined) groups of nodes in the cluster as logical data centers. Additionally, the data centers can be further divided into logical racks.

The term logical is used here because the data centers may or may not be physically separate from each other. That is, nodes in a single physical data center can be split into smaller data centers, and ...
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Publisher Resources

ISBN: 9781789131499Supplemental Content