Abstract: Systems and arrangements to adjust resource accessibility based upon usage modes are contemplated. Embodiments may include a supervisor instance such as an operating system that is adapted to select one or more supervisor keys from a set of supervisor keys available to the host node or platform upon which the supervisor instance is operating. The supervisor instance may select the supervisor key(s) based upon an association of the supervisor instance with a usage mode represented by a supervisor key name. In many embodiments, supervisor key names may be associated with resources via with one or more of the supervisor keys based upon the resources needed when operating in the usage modes by a system administrator. Once the supervisor instance is initialized, the supervisor instance may issue client keys that allow access to subsets of the resources available to the supervisor instance based upon usage modes of the clients.

Abstract: A method for authenticating a requesting entity in a communications environment. In an exemplary embodiment, the method includes determining a client identification of a client node associated with the requesting entity, and determining whether the requesting entity associated with the client node is acting in a supervisor capacity. A key to the requesting entity is returned from a resource provider node upon determining that the client identification of the client node indicates that the client node is permitted to access one or more resources of the provider node, and that the client node is acting in a supervisor capacity.

Abstract: A method for supervisor partitioning of client resources in a communications environment includes receiving, at a client node, an allocated set of resources over a communications network, and partitioning the allocated set of resources among one or more applications associated with the client node using a local authority. Following the partitioning, communication requests are issued from the one or more applications to a shared resource provider node without inspection by the local authority.

Abstract: Resources of a server node are logically divided into a plurality of sets of resources. At least one set of resources is assigned to one or more client nodes. The association of the at least one set of resources with the one or more client nodes is via a data structure stored at the server node. The data structure is provided by a trusted agent over a communications medium coupling the server node and the one or more client nodes. It includes information that indicates the resources accessible by the client nodes. To access the information, an identifier, also provided by a trusted agent, is employed.

Abstract: A method, system, and product in a data processing system are disclosed for providing centralized management of a InfiniBand distributed system-area network that includes multiple end nodes. A manager application is established in one of the end nodes. An agent application is established in one or more end nodes. Each agent application is independent from the manager application. The manager application maintains a current list of active agent applications and uses the list to manage the agent applications in the end nodes.

Abstract: A mechanism for managing multicast groups with send-without-receive (SWR) joiners without the use of traps on creation and deletion of groups is provided. Group information is maintained continuously while the SWR member exists. When an SWR join is attempted and the group does not already exist, the group information (MLID) is marked as used and the first switch to which the SWR packets are sent is routed to discard all packets sent to the group. When receiving members join the group, the routing is updated so that the SWR member begins sending to the receiving members. When the last receiving member leaves the group, the first switch is again routed to discard the packets.