Cloud Database System With Multi-Cash For Reducing Network Cost In Processing Select Query

摘要

Disclosed is a back-end node in a cloud database system according to some exemplary embodiments of the present disclosure to solve the problems. The back-end node may include a communication unit; a back-end cache storing buffer cache data and metadata information, wherein the buffer cache data and the metadata information correspond to a data block stored in the database system; and a processor, wherein the metadata information includes information of a front-end node which stores the data block in its front-end cache.