System for backing up data synchronously and a synchronously depending on a pre-established criterion
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United States of America Patent
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Sep 4, 2001
Grant Date -
N/A
app pub date -
Apr 22, 1997
filing date -
Apr 21, 1997
priority date (Note) -
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status (Latency Note)
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Abstract
The invention relates to a database system comprising a plurality of stations (10.sub.1, 10.sub.2, . . . , 10.sub.n) communicating with one another. The data that is inserted or updated in an originating station is backed up in at least one other station referred to as a 'receiving' station. Means are provided so that data of a determined kind can be backed up synchronously or asynchronously on another station depending on whether or not a pre-established criterion is satisfied. For example, data that is modified progressively is backed up asynchronously until the data has finished being modified, and is backed up synchronously once modification has been finished. Such data may be routing data in a telecommunications system.
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