You can install Tableau Server on a single computer or across multiple computers as a multi-node cluster, as long as the total number of cores in all the computers does not exceed the total number that the license allows.
Instead, the license specifies the maximum number of computer cores on which you can run Tableau Server. A core-based license metric imposes no constraints on the number of user accounts in Tableau Server. Administrators can add users based on available licenses of each type. Each user that accesses Tableau Server must be licensed and assigned a role. A role-basedlicense metric allows you to deploy Tableau Server on a single computer or on multiple computers in a cluster. Tableau’s term license model is defined by the metric that permits use of Tableau Server.
Understanding License Models And Product Keys Tableau