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      25.6.7 Adding NDB Cluster Data Nodes Online
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     <span class="section">
      <a href="mysql-cluster-online-add-node-remarks.html">
       25.6.7.1 Adding NDB Cluster Data Nodes Online: General Issues
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      <a href="mysql-cluster-online-add-node-basics.html">
       25.6.7.2 Adding NDB Cluster Data Nodes Online: Basic procedure
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      <a href="mysql-cluster-online-add-node-example.html">
       25.6.7.3 Adding NDB Cluster Data Nodes Online: Detailed Example
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  <p>
   This section describes how to add NDB Cluster data nodes
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    “
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     online
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   —that is, without needing to shut down
      the cluster completely and restart it as part of the process.
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    Important
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    Currently, you must add new data nodes to an NDB Cluster as part
        of a new node group. In addition, it is not possible to change
        the number of fragment replicas (or the number of nodes per node
        group) online.
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