Posted On: Feb 22, 2018
Tunable Consistency is used to keep the fresh and co-exist data rows on all their replicas. It permits the clients a better option in which they can select a consistency level as per their requirement. Tunable consistency is one of a kind features that make the users, developers, and architects having Cassandra their primary choice. Basically, it supports two kinds of consistencies
Eventual consistency- In this consistency, all the data is accessible from the last update, it has no new update. It is just mean to achieve replication of data.
Strong consistency- In this type of consistency, it supports some kind of conditions. These are: -
R+ W > N, where
N stands for the number of replications of data
W stands for the number of nodes that demand to grant for a prosperous write
R stands for the number of nodes that demand to grant for a prosperous read.
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