Tenants and subtenants are organizational units within the horizontal cluster. A tenant is normally an organization whose employees use a clustered app. A subtenant is a subsidiary, a division, or a department of a tenant company that is required to distribute access roles and permissions without referring specific users.

Here is how tenants and subtenants work:

• Representation in the cluster structure: Tenants and subtenants are represented in the cluster structure as Iotellect users on primary nodes. Each primary node has a local user context for each cluster tenant whose realm includes this node.

• Ownership of resources: Tenants own a specific set of clustered resources.

• Access control: Subtenants have access to some or all resources of their tenant depending on their permissions.

Permissions determine what actions users can perform and what resources they have access to. When a user logs in, the login server communicates with the cluster coordinator to retrieve a list of cluster resources that the user can interact with. This list is then converted into a virtual context tree, allowing the user to interact with all categories of cluster resources (clustered, replicated and session resources) via the login server.

Permissions in a horizontal cluster are implemented in such a way as to:

• Provide the necessary performance to support a large number of devices and processing data from these devices.

• Provide transparent access to cluster resources based on user's access rights inherited from the tenant and subtenants he’s member of.

• Arrange and display resources in a virtual context tree as if they were physically located on the same Iotellect server.

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