Electrical computers and digital processing systems: multicomput – Multicomputer data transferring via shared memory – Plural shared memories
Reexamination Certificate
2008-03-18
2008-03-18
Vu, Viet D. (Department: 2154)
Electrical computers and digital processing systems: multicomput
Multicomputer data transferring via shared memory
Plural shared memories
C709S215000, C709S226000, C707S793000
Reexamination Certificate
active
07346664
ABSTRACT:
A NAS switch provides file migrations in a NAS storage network that are transparent to the clients. A source file server exports an original NAS file handles indicative of object locations on the source file server to the NAS switch. The NAS switch modifies the original NAS file handles to an internal file system and maps the original NAS file handles to a switch file handles independent of location. The NAS switch exports the switch file handles to a client. The client looks-up objects and makes NAS requests to the source file server using switch file handles. The NAS switch performs file migration by first replicating the namespace containing data to be migrated from source file server to a destination file server. Separately, the NAS replicates data which is a relatively longer process than the namespace replication. During data replication, namespace access requests for objects are directed to the replicated namespace. After data replication, file object requests for migrated objects are redirected to the destination file server in a process that is transparent to the client.
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Chawla Rajeev
Iyengar Anand
Tsirigotis Panagiotis
Wong Thomas K.
Beyer & Weaver, LLP
Neopath Networks, Inc.
Vu Viet D.
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