Communication for version management in a distributed information service
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United States of America Patent
Stats
-
Dec 22, 1987
Grant Date -
N/A
app pub date -
Nov 26, 1985
filing date -
Nov 26, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
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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