TARGET-DRIVEN INDEPENDENT DATA INTEGRITY AND REDUNDANCY RECOVERY IN A SHARED-NOTHING DISTRIBUTED STORAGE SYSTEM

摘要

A distributed shared-nothing storage system including independent nodes connected to a network and a host that sends I/O processing to the data stored on the storage system. Each node is capable of performing its own recovery of partially written data and maintaining consistency of the data stored on the storage system. The nodes independently calculate the location of all the data across the node and independently balance the data, maintain consistency based on redundancy policy of the storage system and migrate data according to a location change. If a node determines it stores incomplete or damaged data, the node reconstructs the data it stores from replica data on other nodes. During migration of data between the nodes, I/O processing from the host is not interrupted.