Abstract: Data communication security systems and methods are disclosed. One such system includes a network interface configured for transport layer protocol communications at a communication port. The network interface includes a security module communicatively connected to a transport layer data path. The system further includes a file-based application programming interface defining a plurality of attributes of the network interface and including at least one attribute associated with data encryption managed by the security module and accessible for use in logical I/O operations.

Abstract: An embodiment of the present invention is a technique to manage elapsed time performance. Current baseline statistics on N performance components are obtained for a set of programs belonging to a single workload group. N current component performance values associated with the N performance components are obtained in a current measurement for the set of programs at the beginning of a current monitoring cycle. A control component is selected from the N performance components based on the current baseline statistics and the N current component performance values. A control value is applied to an operation corresponding to the control component in the set of programs. A next monitoring cycle is waited for.

Abstract: Mechanisms and methods for traversing trees are disclosed. A novel data structure for modeling a node that includes a unique node counter also is described. In certain embodiments of the inventions the unique node counter is a timestamp of sufficient granularity to render each timestamp in the tree unique. A node counter, in conjunction with the lineage of a specified continuation node may be used to locate an appropriate starting point within a tree in a continuation call when the specified continuation node no longer exists in the tree.