Cascaded replication system with remote site resynchronization after intermediate site failure
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United States of America Patent
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Aug 5, 2014
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N/A
app pub date -
Sep 6, 2005
filing date -
Sep 6, 2005
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Abstract
Various methods and systems for performing cascaded replication are disclosed. For example, one method involves receiving an acknowledgment at a primary replication site from an intermediate replication site. The acknowledgment identifies whether a change has been applied to a remote replication site. The method also involves updating a journal, in response to the acknowledgment. The journal identifies whether the change is currently being replicated. The method can also involve detecting that the intermediate replication site is inaccessible. In response, the method synchronizes a copy of application data at the remote replication site by applying one or more changes identified in the journal to the copy of the application data at the remote replication site.
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