Cluster structure based on omg standard middleware and compatible omg standaed dds

The present invention relates to an OMG standard middleware-based cluster structure compatible with an OMG standard data distribution service (DDS) in a cluster in which a computer system is composed of a plurality of nodes. The present invention comprises the nodes which comprise copy caches comprising a data storage class, a copy class, and a node managing device and support the OMG standard DDS, and a legacy node which supports the OMG standard DDS without having the copy caches. When the legacy node is newly registered in the cluster structure, the copy class transmits data inputted from the data storage class to other nodes and the legacy node through a middleware operated with the OMG standard DDS and inputs the data transmitted from the other nodes and the legacy node in the data storage class.