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14 records (took 0.021 seconds)

    1.
    发明专利
    未知

    公开(公告)号：DE69523020D1

    公开(公告)日：2001-11-08

    申请号：DE69523020

    申请日：1995-12-06

    Applicant: XEROX CORP

    Inventor： TERRY DOUGLAS B ,  THEIMER MARVIN M ,  DEMERS ALAN J ,  PETERSEN KARIN ,  SPREITZER MICHAEL J ,  WELCH BRENT B

    IPC: G06F12/00 ,  G06F17/30

    Abstract: A write log that distinguishes between write operations that are known to be in a stable write order ("committed writes") and write operations that still are in a potentially unstable write order ("tentative writes") are maintained for each instance of a weakly consistent replicated database so that the stable and the potentially unstable data in any given instance of such a database can be explicitly identified.

    2.
    发明专利
    未知

    公开(公告)号：DE69426862T2

    公开(公告)日：2001-06-21

    申请号：DE69426862

    申请日：1994-12-13

    Applicant: XEROX CORP

    Inventor： WEISER MARK D ,  GOLDSTEIN RICHARD J AKA RICH G ,  WANT ROY ,  WELCH BRENT B ,  ELROD SCOTT A ,  MALTZ DAVID A ,  SCHILIT WILLIAM N ,  THEIMER MARVIN M

    IPC: G06F15/00 ,  G06F13/00 ,  H04L12/24 ,  H04L12/56 ,  H04Q9/00

    Abstract: The present invention comprises a method and a system by which mobile, remote, adaptable controllers can dynamically control a multitude of resources within a given region (e.g. a room) such that policies determined for the region, controllers, and resources can be arbitrated in a manner that creates a meaningful work environment for users in the region. Furthermore, the present invention allows a controller to dynamically choose one of various modes of operation, either singly or in combination, allowing the user of the controller a maximum of flexibility in interacting with the resources in the region. These modes of operation comprise, but are not limited, to: a manual mode whereby a user may select a list of available resources that meet region-level policy and two automatic modes whereby controllers and resources may, without direct user input, make requests and allocation based on region-level policy and other constraints. The present invention maximizes the control of the resources of a region such that the control of the most suitable resources is dynamically situated in the hands of the user on an adaptable mobile controller.

    5.
    发明专利
    未知

    公开(公告)号：DE69528338D1

    公开(公告)日：2002-10-31

    申请号：DE69528338

    申请日：1995-12-06

    Applicant: XEROX CORP

    Inventor： TERRY DOUGLAS B ,  THEIMER MARVIN M ,  DEMERS ALAN J ,  PETERSEN KARIN ,  SPREITZER MICHAEL J ,  WELCH BRENT B

    IPC: G06F12/00 ,  G06F17/30

    Abstract: Write operations for weakly consistent replicated database systems have embedded conflict detection and conflict resolution procedures for identifying and resolving, respectively conflicts between such write operations and the current state of any given instance of such a database. These write operations are committed to a firm execution order by the host for one instance of such a database, and this execution order propagates to the other instances of the database.

    7.
    发明专利
    未知

    公开(公告)号：DE69525906D1

    公开(公告)日：2002-04-25

    申请号：DE69525906

    申请日：1995-12-06

    Applicant: XEROX CORP

    Inventor： TERRY DOUGLAS B ,  THEIMER MARVIN M ,  DEMERS ALAN J ,  PETERSEN KARIN ,  SPREITZER MICHAEL J ,  WELCH BRENT B

    IPC: G06F12/00 ,  G06F9/46 ,  G06F15/16 ,  G06F17/30

    Abstract: Write operations for weakly consistent replicated database systems have embedded dependency queries and related descriptions of the results expected to be returned when respective dependency queries are run against the databases. Write operations that conflict with the current state of any given instance of such a database are detected by comparing the results that are returned when the dependency queries for those writes are run against the given instance of the database with the results that are expected to be returned.

    8.
    发明专利
    未知

    公开(公告)号：DE69528338T2

    公开(公告)日：2003-01-23

    申请号：DE69528338

    申请日：1995-12-06

    Applicant: XEROX CORP

    Inventor： TERRY DOUGLAS B ,  THEIMER MARVIN M ,  DEMERS ALAN J ,  PETERSEN KARIN ,  SPREITZER MICHAEL J ,  WELCH BRENT B

    IPC: G06F12/00 ,  G06F17/30

    Abstract: Write operations for weakly consistent replicated database systems have embedded conflict detection and conflict resolution procedures for identifying and resolving, respectively conflicts between such write operations and the current state of any given instance of such a database. These write operations are committed to a firm execution order by the host for one instance of such a database, and this execution order propagates to the other instances of the database.

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