April 2017
Beginner to intermediate
360 pages
9h 35m
English
Content preview from Learning Apache Cassandra - Second Edition
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Consistency QUORUM
As discussed earlier, consistency QUORUM means that a majority of replicas need to acknowledge a write for the write request to succeed. In the case of keyspace3 with replication factor 3, this majority turns out to be two replicas. However, in case of keyspace2 with replication factor 2, this majority still turns out to be replicas.
To better understand how consistency works, let's bring a node down within the cluster. Go to the Terminal where you started Cassandra 3 (Cassandra with listen address 127.0.0.3), and simply press Ctrl + C on the keyboard in case you started Cassandra in the foreground mode with option -f. If you started Cassandra in the background mode, get the process ID of Cassandra, and simply kill it. ...
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