Asynchronous remote replication system of distributed storage and asynchronous remote replication method of distributed storage

摘要

To provide an asynchronous remote replication system of distributed storage enabling high-speed asynchronous copy.According to an embodiment, in an asynchronous remote replication system of distributed storage, each node of a first distributed storage comprises map information holding means and data replication means. The map information holding means holds second map information in which identifiers of a plurality of storage devices in the second distributed storage are associated with a fixed serial number. In order to create a copy of data stored in one or more storage devices in its own node in the storage device in the second distributed storage, the data replicating means replicates the first logical disk with a fixed length for each chunk , One storage device is selected from the plurality of storage devices in the second distributed storage based on the identifier of each chunk and the second map information and a copy of the data is created in the selected storage device .(FIG.