Abstract: Herein, rule-based handling of request for resource re-allocations provides for automated re-allocations, reducing the need for administrator intervention. The resources available to a reservation can be increased, decreased, or otherwise modified by forming and breaking selected connections between reservations and hosts. The rules herein determine which connections are to be formed or broken. Each rule associates a connection-modification criterion with a condition. In the event, the condition for a rule is satisfied by a reallocation request (and its context), the criterion is applied to the request plus its context to generate a list of connection modification plans. Each connection-modification plan identifies one or more connections between hosts and reservations to be formed or broken. Implementing the plan yields the desired re-allocation.

Abstract: A computer system includes hosts for hosting virtual infrastructures. Compute resources provided by the hosts are allocated to user groups (e.g., departments, projects) in the form of reservations that define amounts of resources available to the user groups. Tags can be associated with both hosts and with reservations. A reservation has access to resources of a host having a host tag that matches a user tag associated with the reservation. Thus, to make a host available to a reservation, either 1) a tag can be added to the reservation to match a tag of the host, or 2) a tag can be added to the host to match a tag of a reservation. This can be more convenient than a case in which both a host and a reservation must be configured to give the reservation access to the host.

Abstract: Herein, rule-based handling of request for resource re-allocations provides for automated re-allocations, reducing the need for administrator intervention. The resources available to a reservation can be increased, decreased, or otherwise modified by forming and breaking selected connections between reservations and hosts. The rules herein determine which connections are to be formed or broken. Each rule associates a connection-modification criterion with a condition. In the event, the condition for a rule is satisfied by a reallocation request (and its context), the criterion is applied to the request plus its context to generate a list of connection modification plans. Each connection-modification plan identifies one or more connections between hosts and reservations to be formed or broken. Implementing the plan yields the desired re-allocation.

Abstract: A computer system includes hosts for hosting virtual infrastructures. Compute resources provided by the hosts are allocated to user groups (e.g., departments, projects) in the form of reservations that define amounts of resources available to the user groups. Tags can be associated with both hosts and with reservations. A reservation has access to resources of a host having a host tag that matches a user tag associated with the reservation. Thus, to make a host available to a reservation, either 1) a tag can be added to the reservation to match a tag of the host, or 2) a tag can be added to the host to match a tag of a reservation. This can be more convenient than a case in which both a host and a reservation must be configured to give the reservation access to the host.