Enforcing uniform file-locking for diverse file-locking protocols
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United States of America Patent
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Nov 6, 2007
Grant Date -
Apr 3, 2003
app pub date -
Aug 28, 2002
filing date -
Dec 5, 1997
priority date (Note) -
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status (Latency Note)
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Abstract
The invention provides a method and system for connect interoperation of multiple diverse file server or file locking protocols, using a uniform multi-protocol lock management system. A file server determines, before allowing any client device to access data or to obtain a lock, whether that would be inconsistent with existing locks, regardless of originating client device or originating protocol for those existing locks. A first protocol enforces mandatory file-open and file-locking together with an opportunistic file-locking technique, while a second protocol lacks file-open semantics and provides only for advisory byte-range and file locking.
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