Boots – shoes – and leggings
Patent
1985-11-26
1987-12-22
Zache, Raulfe B.
Boots, shoes, and leggings
364300, G06F 100
Patent
active
047149922
ABSTRACT:
In a distributed processing system network in which at least one node operates as a source location having access to data objects of a database, and at least one other node operates as a replica location storing replicas of data objects from the source location, managing obsolescence of the replicas is performed by having the replica locations submitting requests to the source location for ascertaining obsolescence of data objects. The source location, responsive to a request from a requesting replica location, extracts identifiers of a set of obsolete objects and communicates them to the requesting replica location. Upon receiving the identifiers, the requesting location renders inaccessible those data objects corresponding to the identifiers received. The source location then removes those identifiers that have been communicated to the requesting replica location.
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IEEE Transactions on Computers, vol. C-34, No. 6, Jun. 1985, "The Exclusive-Writer Approach to Updating Replicated Files in Distributed Processing Systems", by Chu et al.
ACM Transactions on Database Systems, 5(1)U, 1-17, 1980, "Introduction to a System for Distributed Databases (SDD-1)", by Rothnie et al.
ACM Proceedings SIGMOD, 30-39, 1983, "On the Design of a Query Strategy in a Distributed Database Environment", by Yu et al.
ACM Proceedings SIGMOD, 228-237, 1983, "Overview of an ADA Compatible Distributed Database Manager", by Chan et al.
ACM Transactions on Database Systems, 7(2), 209-234, 1982, "Read-Only Transactions in a Distributed Database", by Garcia-Molina et al.
Gladney Henry M.
Lorch Douglas J.
Mattson Richard L.
Haynes Mark A.
International Business Machines - Corporation
Lee Simon K.
Zache Raulfe B.
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