Abstract: A method, apparatus, system, and computer program code for policy-based enforcement in a data virtualization system is provided. Responsive to receiving a query, a computer identifies a virtual object among a set of connected objects that is represented by a set of data assets and their hierarchical relationships. The virtual object corresponds to a subset of the data assets. The computer identifies a subset of objects according to a cumulative transitive closure of the virtual object over the set of connected objects. The computer identifies a set of policies for the subset of objects. For each object in the subset of objects, the computer determines an intermediate decision according to set of policies, whereby a set of intermediate decisions is formed. The computer deterministically reconciles the set of intermediate decisions to generate a resolved decision. The computer provides access to the queried virtual objects based on the resolved decision.

Abstract: A method, apparatus, system, and computer program code for policy-based enforcement in a data virtualization system is provided. Responsive to receiving a query, a computer identifies a virtual object among a set of connected objects that is represented by a set of data assets and their hierarchical relationships. The virtual object corresponds to a subset of the data assets. The computer identifies a subset of objects according to a cumulative transitive closure of the virtual object over the set of connected objects. The computer identifies a set of policies for the subset of objects. For each object in the subset of objects, the computer determines an intermediate decision according to set of policies, whereby a set of intermediate decisions is formed. The computer deterministically reconciles the set of intermediate decisions to generate a resolved decision. The computer provides access to the queried virtual objects based on the resolved decision.

Abstract: A method for dynamically managing memory to support one or more processes executing in a remote direct memory access (RDMA) environment is provided. The method includes inserting a descriptor in a shared descriptor table, the descriptor corresponding to a block of memory allocated to a heap by an operating system. The method further includes, in response to allocating a portion of the block of memory from the heap to a process, determining whether the process has an existing registration with an application program interface for the block of memory. If the process has no existing registration, registering the process the process is registered with the application program interface and a registration corresponding to the block of memory is stored in a private registration table of the process.

Abstract: A method for dynamically managing memory to support one or more processes executing in a remote direct memory access (RDMA) environment is provided. The method includes inserting a descriptor in a shared descriptor table, the descriptor corresponding to a block of memory allocated to a heap by an operating system. The method further includes, in response to allocating a portion of the block of memory from the heap to a process, determining whether the process has an existing registration with an application program interface for the block of memory. If the process has no existing registration, registering the process the process is registered with the application program interface and a registration corresponding to the block of memory is stored in a private registration table of the process.