Architecting Multisite vCloud Director : Multisite vCloud Director v9.0 : 3.1 Multisite Concepts
   
3.1 Multisite Concepts
vCloud Director v9.0 provides a number of new features, capabilities and concepts. Multisite capabilities allow an organization user to log in to the vCloud Director UI hosted at any of the sites where they have an Organization and Organization VDC. Upon login, the UI displays a sites icon that allows them to switch to other sites in which they have resources so that they can manage them from the same session. There are a number of foundational concepts which together create the new multisite model.
Table 1. Foundational Concepts
Term
Definition
Site
A single vCloud Director deployment that acts as a logical unit of a multisite installation.
Organization
A Tenant’s presence on a site.
Member
A site or organization which is part of (that is, a member of) an association.
Association
A collection of members, either sites or organizations.
 
In previous versions of vCloud Director, the concept of a “site” has always been implicit. In vCloud Director v9.0, the site becomes an explicit part of the data model and a fully-fledged REST API object. In addition to sites, the other key component of multisite operation is association. vCloud Director contains a new API which can “associate” sites and organizations. The purpose of associating objects between sites is to establish a trust relationship between them. This trust relationship enables one object to make API calls on behalf of the user, against other members of the association. This forms the foundation of the multisite operation. The following sections describe the process of creating the associations so that customers can take advantage of the new capabilities.