DISTRIBUTED STORAGE APPARATUS, STORAGE NODE, DATA PROVISION METHOD AND PROGRAM

摘要

The objective of the present invention is to allow acquisition of data elements for which times of generation of data from each of a plurality of storage nodes that distribute and store stream data delivered from a device are sufficiently near. A plurality of storage nodes included in a distributed storage apparatus have: a data storage unit which accumulates stream data units output from a device; a first time frame generation unit which generates time frames synchronized between other storage nodes, and associates data elements included in the stream data units accumulated at the data storage unit with any time frame; a data selection unit which, on the basis of an access request from a client terminal, selects data elements that has been associated with a predetermined time frame from among the stream data units that have been accumulated at the data storage unit; and a data transmission unit which transmits data elements that have been selected by the data selection unit to the client terminal.