We have received many questions for users who were confused by the "Qty Nodes" field on the purchasing form. Qty Nodes or Quantity Nodes, means the number of computers that host your installation of Confluence. For the vast majority of users this value will be 1.
For users of clustered versions of Confluence (mainly very large installations of Confluence), this will be the same value of Qty Nodes your Confluence installation is licensed for. You can read more about Confluence clustering at the Atlassian website at the link below: