Abstract: Each of a plurality of data items is stored in a table data structure. A row identifier and column identifier are associated with each respective data item, and each respective item is stored at a logical location in the table data structure specified by its row identifier and column identifier. A plurality of data items is stored in a cell of the table data structure, and a timestamp is associated with each of the plurality of data items stored in the cell. Each of the data items stored in the cell has the same row identifier, the same column identifier, and a distinct timestamp. In some embodiments, each row identifier is a string of arbitrary length and arbitrary value. Similarly, in some embodiments each column identifier is a string of arbitrary length and arbitrary value.

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.