Adding Nodes to an HAC Cluster

The HAC cluster is a group of High Availability Computing nodes. High Availability Computing nodes are clients where the High Availability Computing package is installed. The High Availability Computing nodes coordinate the operations of individual Index Server nodes in an Index Server cloud. You can add more clients with the High Availability Computing package installed as nodes to an existing HAC cluster.

Before You Begin

This procedure assumes you have already created an HAC cluster in your CommCell environment. If you have not, see Creating an HAC Cluster for Index Server Cloud.


  1. From the CommCell Browser, expand Client Computer Groups > HAC Cluster.
  2. Right-click the HAC cluster name, and then click Properties.
  3. Next to Nodes, click the Add button.
  4. In the Select Client Nodes dialog box, add clients with the High Availability Computing package installed to the HAC cluster as follows:
    1. In the Add HAC Clients list, select three or five clients.

      Note: The HAC cluster must contain an odd number of nodes. For small to medium environments, use three nodes. For large environments, use five nodes.

    2. Click the right-arrow > button.

      The selected client names appear in the HAC Clients in this cluster list.

  5. Click OK.

Last modified: 1/17/2019 7:50:35 PM