System and methods for optimized access in a multi-user environment
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United States of America Patent
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Feb 20, 1996
Issued Date -
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app pub date -
Jul 23, 1993
filing date -
Feb 19, 1993
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Abstract
A system of the present invention includes a server connected to one or more workstations or 'clients' through a computer network. Methods are provided whereby network data access operations, such as are common in shared data processing, are minimized to only those which are necessary for system operation. In all other instances (i.e., time periods when updating is not needed), a workstation may gain access to the data from a local copy stored in a local buffer, preferably a rapid-access memory of the client. At periodic intervals, a workstation is interrupted for marking its local copy of the data as 'invalid'--that is, the copy may be inconsistent with a corresponding version stored on the server. With the next access to the data, the local copy is updated from the version resident on the server. Additional optimization may be added for determining whether the server version has been 'touched' (i.e., changed) since last transferred to the local buffer, with the local copy being updated only when such a change has been detected. By maintaining data locally, the penalty incurred with frequent, large data transfers across a network connection is avoided.
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- 15 United States
- 10 France
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- 2 Other
Patent Owner(s)
- BORLAND SOFTWARE CORPORATION
International Classification(s)
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Kiuchi, Raymond S | Santa Cruz, CA | 2 | 103 |
Solton, Randolph T | Berkeley, CA | 4 | 285 |
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Fee | Large entity fee | small entity fee | micro entity fee | due date |
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Fee | Large entity fee | small entity fee | micro entity fee |
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Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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