<para>Each node can be in one of the following states:
<variablelist>
<varlistentry>
+ <term>master</term>
+ <listitem>
+ <para>
+ Only one node per cluster can be in this role, and
+ this node is the one holding the authoritative copy of
+ the cluster configuration and the one that can
+ actually execute commands on the cluster and modify
+ the cluster state. See more details under
+ <emphasis>Cluster configuration</emphasis>.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
<term>master_candidate</term>
<listitem>
<para>The node receives the full cluster configuration