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You're reading from  Cassandra 3.x High Availability - Second Edition

Product typeBook
Published inAug 2016
Reading LevelIntermediate
Publisher
ISBN-139781786462107
Edition2nd Edition
Languages
Java
Tools
Cassandra
Concepts
Database Administration
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Author (1)
Robbie Strickland
Robbie Strickland
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Robbie Strickland

Robbie Strickland has been involved in the Apache Cassandra project since 2010, and he initially went to production with the 0.5 release. He has made numerous contributions over the years, including work on drivers for C# and Scala and multiple contributions to the core Cassandra codebase. In 2013 he became the very first certified Cassandra developer, and in 2014 DataStax selected him as an Apache Cassandra MVP. Robbie has been an active speaker and writer in the Cassandra community and is the founder of the Atlanta Cassandra Users Group. Other examples of his writing can be found on the DataStax blog, and he has presented numerous webinars and conference talks over the years.
Read more about Robbie Strickland

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Consistency conflicts

In Chapter 1 , Cassandra's Approach to High Availability, we discussed Cassandra's tunable consistency characteristics. For any given call, it is possible to achieve either strong consistency or eventual consistency. In the former case, we can know for certain that the copy of the data that Cassandra returns will be the latest. In the case of eventual consistency, the data returned may or may not be the latest, or there may be no data returned at all if the node is unaware of newly inserted data. Under eventual consistency, it is also possible to see deleted data if the node you're reading from has not yet received the delete request.

Depending on the read_repair_chance setting and the consistency level chosen for the read operation (more on this in the anti-entropy section later in this chapter), Cassandra might block the client and resolve the conflict immediately, or this might occur asynchronously. If data in conflict is never requested, the system will resolve...

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Cassandra 3.x High Availability - Second Edition
Published in: Aug 2016Publisher: ISBN-13: 9781786462107
© 2016 Packt Publishing Limited All Rights Reserved

Author (1)

author image
Robbie Strickland

Robbie Strickland has been involved in the Apache Cassandra project since 2010, and he initially went to production with the 0.5 release. He has made numerous contributions over the years, including work on drivers for C# and Scala and multiple contributions to the core Cassandra codebase. In 2013 he became the very first certified Cassandra developer, and in 2014 DataStax selected him as an Apache Cassandra MVP. Robbie has been an active speaker and writer in the Cassandra community and is the founder of the Atlanta Cassandra Users Group. Other examples of his writing can be found on the DataStax blog, and he has presented numerous webinars and conference talks over the years.
Read more about Robbie Strickland

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