Cluster caching with concurrency checking
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United States of America Patent
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Oct 28, 2008
Grant Date -
Jun 8, 2006
app pub date -
Jan 25, 2006
filing date -
Aug 30, 2001
priority date (Note) -
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status (Latency Note)
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Abstract
Concurrency can be maintained in cluster caching when processing an update request on network server that is storing a local copy of a data item. The request can be processed using the local copy of the data item. A predicated update request can be sent to a network database storing the data item, wherein the database can commit the update if the local copy is current with the data item. If the local copy is not current, the network server can request a new copy, process the request using the current copy, and try another predicated request. The process can continue until the update is committed to the database or aborted. Once committed, any other servers in the cluster can be notified that the data item has been updated. Those other servers can drop any local copy of the data item and can request an updated copy of the data item.
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