server/src/main/java/com/orientechnologies/orient/server/distributed/ODistributedConfiguration.java
public int getReadQuorum(final String clusterName, final int totalConfiguredServers, final String server) {
    return getQuorum("readQuorum", clusterName, totalConfiguredServers, DEFAULT_READ_QUORUM, server);
  }
public int getReadQuorum(final String clusterName, final int totalConfiguredServers, final String server) {
    return getQuorum("readQuorum", clusterName, totalConfiguredServers, DEFAULT_READ_QUORUM, server);
  }
Returns the read quorum.

@param clusterName    Cluster name, or null for *
@param totalConfiguredServers Total node available