server/src/main/java/com/orientechnologies/orient/server/distributed/ODistributedConfiguration.java
private int getQuorum(final String quorumSetting, final String iClusterName, final int totalServers, final Object defaultValue,
      final String server) {
    Object value = getClusterConfiguration(iClusterName).field(quorumSetting);
    if (value == null) {
      value = configuration.field(quorumSetting);
      if (value == null) {
        OLogManager.instance()
            .warn(this, "%s setting not found for cluster=%s in distributed-config.json", quorumSetting, iClusterName);
        value = defaultValue;
      }
    }

    if (value instanceof String) {
      if (value.toString().equalsIgnoreCase(QUORUM_MAJORITY))
        value = totalServers / 2 + 1;
      else if (value.toString().equalsIgnoreCase(QUORUM_ALL))
        value = totalServers;
      else if (value.toString().equalsIgnoreCase(QUORUM_LOCAL_DC)) {
        final String dc = getDataCenterOfServer(server);
        if (dc == null)
          throw new OConfigurationException("Data center not specified for server '" + server + "' in distributed configuration");
        value = getDataCenterWriteQuorum(dc);
      } else
        throw new OConfigurationException(
            "The value '" + value + "' is not supported for " + quorumSetting + " in distributed configuration");
    }

    return (Integer) value;
  }
private int getQuorum(final String quorumSetting, final String iClusterName, final int totalServers, final Object defaultValue,
      final String server) {
    Object value = getClusterConfiguration(iClusterName).field(quorumSetting);
    if (value == null) {
      value = configuration.field(quorumSetting);
      if (value == null) {
        OLogManager.instance()
            .warn(this, "%s setting not found for cluster=%s in distributed-config.json", quorumSetting, iClusterName);
        value = defaultValue;
      }
    }

    if (value instanceof String) {
      if (value.toString().equalsIgnoreCase(QUORUM_MAJORITY))
        value = totalServers / 2 + 1;
      else if (value.toString().equalsIgnoreCase(QUORUM_ALL))
        value = totalServers;
      else if (value.toString().equalsIgnoreCase(QUORUM_LOCAL_DC)) {
        final String dc = getDataCenterOfServer(server);
        if (dc == null)
          throw new OConfigurationException("Data center not specified for server '" + server + "' in distributed configuration");
        value = getDataCenterWriteQuorum(dc);
      } else
        throw new OConfigurationException(
            "The value '" + value + "' is not supported for " + quorumSetting + " in distributed configuration");
    }

    return (Integer) value;
  }
private int getQuorum ( final String quorumSetting , final String iClusterName , final int totalServers , final Object defaultValue , final String server ) { Object value = getClusterConfiguration ( iClusterName ) . field ( quorumSetting ) ; if ( value == null ) { value = configuration . field ( quorumSetting ) ; if ( value == null ) { OLogManager . instance ( ) . warn ( this , "%s setting not found for cluster=%s in distributed-config.json" , quorumSetting , iClusterName ) ; value = defaultValue ; } } if ( value instanceof String ) { if ( value . toString ( ) . equalsIgnoreCase ( QUORUM_MAJORITY ) ) value = totalServers / 2 + 1 ; else if ( value . toString ( ) . equalsIgnoreCase ( QUORUM_ALL ) ) value = totalServers ; else if ( value . toString ( ) . equalsIgnoreCase ( QUORUM_LOCAL_DC ) ) { final String dc = getDataCenterOfServer ( server ) ; if ( dc == null ) throw new OConfigurationException ( "Data center not specified for server '" + server + "' in distributed configuration" ) ; value = getDataCenterWriteQuorum ( dc ) ; } else throw new OConfigurationException ( "The value '" + value + "' is not supported for " + quorumSetting + " in distributed configuration" ) ; } return ( Integer ) value ; }
Returns the read quorum.

@param iClusterName Cluster name, or null for *
@param totalServers Total nodes available
Returns the read quorum .