Abstract: Techniques for performing an incremental update to a set of hierarchically structured information that do not expose the structure and content of the hierarchically structured information to unauthorized parties. The present techniques include encrypting the hierarchically structured information such that an arrangement of nodes and corresponding data of the hierarchically structured information is not exposed and each node includes a corresponding node identifier that is not encrypted and updating the hierarchically structured information by referring to the nodes using the node identifiers.

Abstract: Techniques for verifying whether an incremental update was correctly applied to a set of hierarchically structured information include determining an overall integrity code for the hierarchically structured information and attaching the overall integrity code to the hierarchically structured information. An incremental update according to the present techniques includes an integrity code that is combined into the overall integrity code attached to the hierarchically structured information when the incremental update is applied to the hierarchically structured information. The integrity code of the incremental update is generated such that when the overall integrity code is recomputed it will match the overall integrity code attached to the hierarchically structured information if the incremental update was correctly applied.

Abstract: A lifetime of a display is optimized by determining whether to control at least a portion of a display based on a lifetime metric. A plurality of display control options is identified in response to determining to control the portion of the display, and one of the display control options is selected.

Abstract: An information system with mechanisms for directing incoming client requests to individual access subsystems based on client-side information associated with the client requests. The client-side information enables a client to direct the assignment of the client requests in a manner that enhances overall response time in the information system while minimizing loss of valuable cached information caused by power reduction in the information system.

Abstract: An information server with power-aware adaptation that enables power reduction while minimizing the performance impact of power reduction. An information server according to the present techniques includes a transaction prioritizer that determines which of a set of memory subsystems in the information server is to cache a set of data associated with each incoming information access transaction and further includes a power manager that performs a power adaptation in the information server in response to a set of ranks assigned to the memory subsystems. An association of priorities of the incoming information access transactions to appropriately ranked memory subsystems and the judicious selection of memory subsystems for power adaptation enhances the likelihood that higher priority cached data is not lost during power adaptation.

Abstract: An information system that includes mechanisms for assigning incoming access transactions to individual access subsystems based on an analysis of the incoming access transactions. The analysis and assignment of the incoming access transactions may be used to minimize loss of cached data during power reduction in an information system.