Reducing communication for reads and updates in distributed object systems
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United States of America Patent
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Sep 4, 2007
Grant Date -
Aug 19, 2004
app pub date -
Feb 18, 2003
filing date -
Feb 18, 2003
priority date (Note) -
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Abstract
In a distributed system, a server may distribute a primary object copy having one or more chunks of data associated with a primary per-chunk metadata copy to a client over a network. The client may selectively fetch and update the one or more chunks of data of the primary object copy based on the primary per-chunk metadata copy. For example, by determining at a client whether a portion of the data in a cached data object, such as a file, is changed relative to a copy of a data object for the cached data object at a server, less than all of the data of the cached data object may be replaced with a corresponding data in the copy of the data object.
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