cassandra-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Jean-Armel Luce <>
Subject Consistency level for system_auth keyspace
Date Fri, 01 Mar 2013 14:40:20 GMT

I am using Cassandra 1.2.2.
There are 16 nodes in my cluster in 2 datacenters (8 nodes in each
I am using NetworkTopologyStrategy.

For information, I set a RF = 6 (3 replicas in each datacenter)

With 1.2.2, I am using the new authentication backend PasswordAuthenticator
with the authorizer CassandraAuthorizer.

In the documentation (,
it is written that for all system_auth-related queries, Cassandra uses the
QUORUM consistency level.

In this case, it means that if there is a network split between the 2
datacenters, it is impossible to get the quorum, and all connections will
be rejected.

Is there a reason why Cassandra uses the Quorum consistency level ?
Maybe a local_quorum conssitency level (or a one consistency level) could
do the job ?

Jean Armel

View raw message