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AssigneeLucent Technologies Inc.
InventorsEran Gabber, Bruce Kenneth Hillyer, Wee Teck Ng, Banu Rahime Ozden, Elizabeth Shriver
Estimating the term…
A data replication system is disclosed in which replication functionalities between a host computer, an interconnecting computer network, and a plurality of storage devices are separated into host elements and a plurality of storage elements. The host computer is connected to one or more host elements. The host element is responsible for replicating data between the storage devices, which are each connected to an associated storage element, and for maintaining data consistency. Further, the host element instructs a storage element whose associated storage device does not contain up-to-date data to recover from another one of the plurality of storage elements and its associated storage device. The storage elements and their associated storage devices may be located in any combination of diverse or same geographical sites in a manner to ensure sufficient replication in the event of a site or equipment failure. The storage elements are responsible for executing read and write requests received from the host computer and for maintaining data consistency. When a storage element and its associated storage device is determined not to contain up-to-date data, recovery is effected by data transfer from one of the other storage elements and its associated storage device, that is indicated by the host element. Such recovery is done directly between the respective storage elements and associated storage devices, without transiting the data through the host element.
A host element for use in a data replication system which comprises a host computer, at least one said host element associated with and connected to said host computer, a plurality of storage devices, and an interconnecting computer network, the host element comprising:
A storage element for use in a data replication system which comprises a host computer, a plurality of storage devices, and an interconnecting computer network, at least one storage element being associated with and connected to each one of the storage devices, each one storage element comprising:
A data replication system comprising:
A method for use in a system which comprises a host computer, a plurality of storage devices, and an interconnecting computer network, the method comprising:
A method for use in a data replication system which comprises a host computer, a plurality of storage devices, and an interconnecting computer network, the method comprising:
Dependencies are inferred from the claim text.