Data sharing

Abstract

Different computer platforms are very different in the way they store data. In a heterogeneous environment where platforms are by definition different, a distinction must be made between storage sharing, data copy sharing and true data sharing. In storage sharing, a storage subsystem attached to multiple computer platforms is divided into partitions. Data copy sharing involves the replication of data. If data is being shared without a copy being made of the data, then multiple computer platforms are capable of accessing the same physical instance of the recorded data on a storage subsystem. This is called true data sharing.