Abstract: A cache system to compare memory transactions while facilitating checkpointing and rollback is provided. The system includes at least one processor core including at least one cache operating in write-through mode, at least two checkpoint caches operating in write-back mode, a comparison/checkpoint logic, and a main memory. The at least two checkpoint caches are communicatively coupled to the at least one cache operating in write-through mode. The comparison/checkpoint logic is communicatively coupled to the at least two checkpoint caches. The comparison/checkpoint logic compares memory transactions stored in the at least two checkpoint caches responsive to an initiation of a checkpointing. The main memory is communicatively coupled to at least one of the at least two checkpoint caches.

Abstract: A method to enable an adaptive fault tolerance in a data system is provided. The method includes communicatively coupling a radiation hardened hardware element to at least one interrupt service routine application in a respective at least one processing element, triggering an interrupt service routine by an interrupt signal received from the radiation hardened hardware element at the interrupt service routine application after an execution of a code block by the at least one processing element, and inspecting the internal state of the at least one processing element to determine if an error occurred.

Abstract: An adaptable virtual network system comprises a plurality of network elements and a plurality of virtual links. Each network element is communicatively coupled to at least one other network element via at least one physical link. At least one physical link comprises at least two virtual links. The adaptable virtual network system supports at least two virtual networks, each virtual network comprising at least one virtual link communicatively coupling at least two network elements.

Abstract: A cache system to compare memory transactions while facilitating checkpointing and rollback is provided. The system includes at least one processor core including at least one cache operating in write-through mode, at least two checkpoint caches operating in write-back mode, a comparison/checkpoint logic, and a main memory. The at least two checkpoint caches are communicatively coupled to the at least one cache operating in write-through mode. The comparison/checkpoint logic is communicatively coupled to the at least two checkpoint caches. The comparison/checkpoint logic compares memory transactions stored in the at least two checkpoint caches responsive to an initiation of a checkpointing. The main memory is communicatively coupled to at least one of the at least two checkpoint caches.

Abstract: A method to enable an adaptive fault tolerance in a data system is provided. The method includes communicatively coupling a radiation hardened hardware element to at least one interrupt service routine application in a respective at least one processing element, triggering an interrupt service routine by an interrupt signal received from the radiation hardened hardware element at the interrupt service routine application after an execution of a code block by the at least one processing element, and inspecting the internal state of the at least one processing element to determine if an error occurred.

Abstract: A method of communicatively coupling network elements supporting multiple network protocol types comprises receiving input having multiple network protocol types from an upper-level of the protocol stack at an endpoint-flexible-interface layer in a network endpoint, mapping the input between the upper-level of a protocol stack and a common-lower-level in the protocol stack at the endpoint-flexible-interface layer, and implementing the common-lower-level protocol layer to interface the multiple network protocol types to the physical layer, so that at least two endpoints of a network are communicatively coupled.

Abstract: A method of communicatively coupling network elements supporting multiple network protocol types comprises receiving input having multiple network protocol types from an upper-level of the protocol stack at an endpoint-flexible-interface layer in a network endpoint, mapping the input between the upper-level of a protocol stack and a common-lower-level in the protocol stack at the endpoint-flexible-interface layer, and implementing the common-lower-level protocol layer to interface the multiple network protocol types to the physical layer, so that at least two endpoints of a network are communicatively coupled.

Abstract: An adaptable virtual network system comprises a plurality of network elements and a plurality of virtual links. Each network element is communicatively coupled to at least one other network element via at least one physical link. At least one physical link comprises at least two virtual links. The adaptable virtual network system supports at least two virtual networks, each virtual network comprising at least one virtual link communicatively coupling at least two network elements.