Conflictless replication in a multi-master directory system
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United States of America Patent
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Mar 4, 2008
Grant Date -
Nov 18, 2004
app pub date -
Apr 30, 2004
filing date -
May 15, 2003
priority date (Note) -
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Abstract
A directory server system may include master servers and a non-master server, each server storing directory server data that includes updates, each update having a creation time. The master servers exchange replicate updates through update communications. Each master server may include an update state builder for maintaining local update state items including an estimate time indication related to update communications received by the local master server about the directory server data stored by the designated master server. A master server may also include an upper time builder for evaluating an upper time value that is the earliest one of the estimate time indications in the local update state items. A master server may also include a master-to-non-master replicate function, for sending to the non-master server the updates in the local directory server data which have an associated creation time no later than the upper time value.
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