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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

Hinted handoff

When a node reports another as down, the node that is still up will store structures, known as hints, for the down node. Hints are essentially writes meant for one node that are temporarily stored on another. When the down node returns to a healthy status, the hints are then streamed to that node in an attempt to re-sync its data.

As storage is finite, hints will be stored for up to three hours, by default. This means that a down node must be brought back within that time frame, or data loss will occur.

With Apache Cassandra versions older than 3.0, hints were stored in the hints table of the system keyspace. The problem with this approach is that once the stored hints were replayed, they were then deleted. This frequently ...

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Publisher Resources

ISBN: 9781789131499Supplemental Content