CLOUD DATABASE SYSTEM WITH MULTI-CASH FOR REDUCING NETWORK COST IN PROCESSING SELECT QUERY

摘要

According to some embodiments of the present disclosure for solving the above problems, a back end node in a cloud database system is disclosed. The back-end node may include: a communication unit; a back end cache for storing buffer cache data and metadata information, wherein the buffer cache data and the metadata information correspond to data blocks stored in a database system; processor; and, the metadata information may include information on a front-end node storing the data block in a front-end cache.