Patent ID: 8032488
Filing Date: 2011-10-04
Classification: G06F,Y10S

Abstract:
1. A system for improved data sharing within a cluster of nodes having a database management system, comprising: a network; a node computer system connected to the network, the node computer system comprising: a database connected to the node computer system, the database comprising: means for performing a read operation on virtual replicated table data in a shared-cache mode in a local node using a local buffer cache, the read operation for each requested page performing lock synchronization, caching pages from the virtual replicated table into the local buffer cache, retrieving data from the page, and performing cleanup and page unlocking; and means for performing a modification operation on the virtual replicated table data exclusively in a shared-nothing mode, the modification operation shipped to and executed exclusively in the owner node using a local buffer cache in a shared-nothing algorithm and performing lock synchronization, caching pages from the virtual replicated table into the local buffer cache, retrieving and modifying data from the page, and performing cleanup and page unlocking.