<div id="docs-body">
 <div class="section">
  <div class="titlepage">
   <div>
    <div>
     <h4 class="title">
      <a name="mysql-cluster-params-mgmd">
      </a>
      25.4.2.2 NDB Cluster Management Node Configuration Parameters
     </h4>
    </div>
   </div>
  </div>
  <a class="indexterm" name="idm46045121507328">
  </a>
  <a class="indexterm" name="idm46045121505872">
  </a>
  <a class="indexterm" name="idm46045121504784">
  </a>
  <p>
   The listing in this section provides information about
        parameters used in the
   <code class="literal">
    [ndb_mgmd]
   </code>
   or
   <code class="literal">
    [mgm]
   </code>
   section of a
   <code class="filename">
    config.ini
   </code>
   file for configuring NDB Cluster
        management nodes. For detailed descriptions and other additional
        information about each of these parameters, see
   <a class="xref" href="mysql-cluster-mgm-definition.html" title="25.4.3.5 Defining an NDB Cluster Management Server">
    Section 25.4.3.5, “Defining an NDB Cluster Management Server”
   </a>
   .
  </p>
  <div class="itemizedlist">
   <a name="ndbparam-summary-list-mgmd">
   </a>
   <ul class="itemizedlist" style="list-style-type: disc; ">
    <li class="listitem">
     <p>
      <code class="literal">
       <a class="link" href="mysql-cluster-mgm-definition.html#ndbparam-mgmd-arbitrationdelay">
        ArbitrationDelay
       </a>
      </code>
      :
            When asked to arbitrate, arbitrator waits this long before
            voting (milliseconds).
     </p>
    </li>
    <li class="listitem">
     <p>
      <code class="literal">
       <a class="link" href="mysql-cluster-mgm-definition.html#ndbparam-mgmd-arbitrationrank">
        ArbitrationRank
       </a>
      </code>
      :
            If 0, then management node is not arbitrator. Kernel selects
            arbitrators in order 1, 2.
     </p>
    </li>
    <li class="listitem">
     <p>
      <code class="literal">
       <a class="link" href="mysql-cluster-mgm-definition.html#ndbparam-mgmd-datadir">
        DataDir
       </a>
      </code>
      :
            Data directory for this node.
     </p>
    </li>
    <li class="listitem">
     <p>
      <code class="literal">
       <a class="link" href="mysql-cluster-mgm-definition.html#ndbparam-mgmd-executeoncomputer">
        ExecuteOnComputer
       </a>
      </code>
      :
            String referencing earlier defined COMPUTER.
     </p>
    </li>
    <li class="listitem">
     <p>
      <code class="literal">
       <a class="link" href="mysql-cluster-mgm-definition.html#ndbparam-mgmd-extrasendbuffermemory">
        ExtraSendBufferMemory
       </a>
      </code>
      :
            Memory to use for send buffers in addition to any allocated
            by TotalSendBufferMemory or SendBufferMemory. Default (0)
            allows up to 16MB.
     </p>
    </li>
    <li class="listitem">
     <p>
      <code class="literal">
       <a class="link" href="mysql-cluster-mgm-definition.html#ndbparam-mgmd-heartbeatintervalmgmdmgmd">
        HeartbeatIntervalMgmdMgmd
       </a>
      </code>
      :
            Time between management-node-to-management-node heartbeats;
            connection between management nodes is considered lost after
            3 missed heartbeats.
     </p>
    </li>
    <li class="listitem">
     <p>
      <code class="literal">
       <a class="link" href="mysql-cluster-mgm-definition.html#ndbparam-mgmd-heartbeatthreadpriority">
        HeartbeatThreadPriority
       </a>
      </code>
      :
            Set heartbeat thread policy and priority for management
            nodes; see manual for allowed values.
     </p>
    </li>
    <li class="listitem">
     <p>
      <code class="literal">
       <a class="link" href="mysql-cluster-mgm-definition.html#ndbparam-mgmd-hostname">
        HostName
       </a>
      </code>
      :
            Host name or IP address for this management node.
     </p>
    </li>
    <li class="listitem">
     <p>
      <code class="literal">
       <a class="link" href="mysql-cluster-mgm-definition.html#ndbparam-mgmd-id">
        Id
       </a>
      </code>
      :
            Number identifying management node. Now deprecated; use
            NodeId instead.
     </p>
    </li>
    <li class="listitem">
     <p>
      <code class="literal">
       <a class="link" href="mysql-cluster-mgm-definition.html#ndbparam-mgmd-locationdomainid">
        LocationDomainId
       </a>
      </code>
      :
            Assign this management node to specific availability domain
            or zone. 0 (default) leaves this unset.
     </p>
    </li>
    <li class="listitem">
     <p>
      <code class="literal">
       <a class="link" href="mysql-cluster-mgm-definition.html#ndbparam-mgmd-logdestination">
        LogDestination
       </a>
      </code>
      :
            Where to send log messages: console, system log, or
            specified log file.
     </p>
    </li>
    <li class="listitem">
     <p>
      <code class="literal">
       <a class="link" href="mysql-cluster-mgm-definition.html#ndbparam-mgmd-nodeid">
        NodeId
       </a>
      </code>
      :
            Number uniquely identifying management node among all nodes
            in cluster.
     </p>
    </li>
    <li class="listitem">
     <p>
      <code class="literal">
       <a class="link" href="mysql-cluster-mgm-definition.html#ndbparam-mgmd-portnumber">
        PortNumber
       </a>
      </code>
      :
            Port number to send commands to and fetch configuration from
            management server.
     </p>
    </li>
    <li class="listitem">
     <p>
      <code class="literal">
       <a class="link" href="mysql-cluster-mgm-definition.html#ndbparam-mgmd-portnumberstats">
        PortNumberStats
       </a>
      </code>
      :
            Port number used to get statistical information from
            management server.
     </p>
    </li>
    <li class="listitem">
     <p>
      <code class="literal">
       <a class="link" href="mysql-cluster-mgm-definition.html#ndbparam-mgmd-requiretls">
        RequireTls
       </a>
      </code>
      :
            Client connection must authenticate with TLS before being
            used otherwise.
     </p>
    </li>
    <li class="listitem">
     <p>
      <code class="literal">
       <a class="link" href="mysql-cluster-mgm-definition.html#ndbparam-mgmd-totalsendbuffermemory">
        TotalSendBufferMemory
       </a>
      </code>
      :
            Total memory to use for all transporter send buffers.
     </p>
    </li>
    <li class="listitem">
     <p>
      <code class="literal">
       <a class="link" href="mysql-cluster-mgm-definition.html#ndbparam-mgmd-wan">
        wan
       </a>
      </code>
      :
            Use WAN TCP setting as default.
     </p>
    </li>
   </ul>
  </div>
  <div class="note" style="margin-left: 0.5in; margin-right: 0.5in;">
   <div class="admon-title">
    Note
   </div>
   <p>
    After making changes in a management node's
          configuration, it is necessary to perform a rolling restart of
          the cluster for the new configuration to take effect. See
    <a class="xref" href="mysql-cluster-mgm-definition.html" title="25.4.3.5 Defining an NDB Cluster Management Server">
     Section 25.4.3.5, “Defining an NDB Cluster Management Server”
    </a>
    , for more
          information.
   </p>
   <p>
    To add new management servers to a running NDB Cluster, it is
          also necessary perform a rolling restart of all cluster nodes
          after modifying any existing
    <code class="filename">
     config.ini
    </code>
    files. For more information about issues arising when using
          multiple management nodes, see
    <a class="xref" href="mysql-cluster-limitations-multiple-nodes.html" title="25.2.7.10 Limitations Relating to Multiple NDB Cluster Nodes">
     Section 25.2.7.10, “Limitations Relating to Multiple NDB Cluster Nodes”
    </a>
    .
   </p>
  </div>
 </div>
 <br/>
</div>
