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    • 1. 发明授权
    • System for determining the rights of object access for a server process
by combining them with the rights of the client process
    • 通过将服务器进程的权限与客户端进程的权限相结合来确定服务器进程的对象访问权限的系统
    • US5321841A
    • 1994-06-14
    • US11293
    • 1993-01-29
    • Jeffrey A. EastJames J. WalkerSteven M. JennessMark C. OzurJames W. Kelly, Jr.
    • Jeffrey A. EastJames J. WalkerSteven M. JennessMark C. OzurJames W. Kelly, Jr.
    • G06F9/46G06F13/14
    • G06F9/52G06F9/468
    • In a multitasking, multiuser computer system, a server process temporarily impersonates the characteristics of a client process when the client process preforms a remote procedure call on the server process. Each process has an identifier list with a plurality of identifiers that characterize the process. The server process generates a new identifier list which is either the same as the client process's list, or is the union of the server's and the client's lists. Each object in the system can have an access control list which defines the identifiers that a process must have in order to access the object. The operation system has access checking software for enabling a selected process access to a specified object when the identifiers for the process match the list of identifiers in the access control list of the specified object. The server can therefore access all objects accessible to the client while the server is working for the client. The server can restore its original identifier list after completing the services that it performs for the client.
    • 在多任务多用户计算机系统中,当客户端进程在服务器进程上执行远程过程调用时,服务器进程临时模拟客户端进程的特征。 每个进程具有标识符列表,其具有表征该进程的多个标识符。 服务器进程生成与客户端进程列表相同的新标识符列表,或者是服务器和客户端列表的并集。 系统中的每个对象可以具有访问控制列表,该列表定义进程必须具有的用于访问对象的标识符。 操作系统具有访问检查软件,用于当进程的标识符与指定对象的访问控制列表中的标识符列表相匹配时,使对所指定对象的所选进程访问能力。 因此,当服务器正在为客户端工作时,服务器可以访问客户端可访问的所有对象。 服务器可以在完成为客户端执行的服务后恢复其原始标识符列表。
    • 4. 发明授权
    • Server impersonation of client processes in an object based computer
operating system
    • 在基于对象的计算机操作系统中服务器模拟客户端进程
    • US5187790A
    • 1993-02-16
    • US873359
    • 1992-04-21
    • Jeffrey A. EastJames J. WalkerSteven M. JennessMark C. OzurJames W. Kelly, Jr.
    • Jeffrey A. EastJames J. WalkerSteven M. JennessMark C. OzurJames W. Kelly, Jr.
    • G06F9/46
    • G06F9/52G06F9/468
    • In a multitasking, multiuser computer system, a server process temporarily impersonates the characteristics of a client process when the client process preforms a remote procedure call on the server process. Each process has an identifier list with a plurality of identifiers that characterize the process. The server process generates a new identifier list which is either the same as the client process's list, or is the union of the server's and the client's lists. Each object in the system can have an access control list which defines the identifiers that a process must have in order to access the object. The operation system has access checking software for enabling a selected process access to a specified object when the identifers for the process match the list of identifiers in the access control list of the specified object. The server can therefore access all objects accessible to the client while the server is working for the client. The server can restore its original identifier list after completing the services that it performs for the client.
    • 在多任务多用户计算机系统中,当客户端进程在服务器进程上执行远程过程调用时,服务器进程临时模拟客户端进程的特征。 每个进程具有标识符列表,其具有表征该进程的多个标识符。 服务器进程生成与客户端进程列表相同的新标识符列表,或者是服务器和客户端列表的并集。 系统中的每个对象可以具有访问控制列表,该列表定义进程必须具有的用于访问对象的标识符。 操作系统具有访问检查软件,用于当进程的标识符与指定对象的访问控制列表中的标识符列表匹配时,使所选进程访问指定的对象。 因此,当服务器正在为客户端工作时,服务器可以访问客户端可访问的所有对象。 服务器可以在完成为客户端执行的服务后恢复其原始标识符列表。
    • 8. 发明授权
    • Seamless upgrades in a distributed database system
    • 在分布式数据库系统中进行无缝升​​级
    • US08326800B2
    • 2012-12-04
    • US13051967
    • 2011-03-18
    • Conor John CunninghamAjay KalhanClifford T. DibbleTomas TaliusSanteri Olavi VoutilainenJeffrey A. EastAlexandre VerbitskiYixue Zhu
    • Conor John CunninghamAjay KalhanClifford T. DibbleTomas TaliusSanteri Olavi VoutilainenJeffrey A. EastAlexandre VerbitskiYixue Zhu
    • G06F17/30
    • G06F17/30578
    • Embodiments are directed to providing distributed database service upgrades of database server instances in a computer cluster using multiple database server instances and to monitoring and maintaining a distributed database service during upgrade. In an embodiment, each computer system in a computer cluster instantiates at least two different database server instances on each of the nodes in the cluster. The first database server instances are configured to operate using a current distributed database version and the second instances are configured to operate using a new, updated distributed database service version. The computer system receives an indication that the distributed database service is to be upgraded. Then, based on the received indication, the computer system migrates database replicas from the first database server instances to the second database server instances which operate the new, updated service version, substantially without user-visible downtime.
    • 实施例旨在使用多个数据库服务器实例在计算机集群中提供数据库服务器实例的分布式数据库服务升级,并在升级期间监视和维护分布式数据库服务。 在一个实施例中,计算机集群中的每个计算机系统在群集中的每个节点上实例化至少两个不同的数据库服务器实例。 第一个数据库服务器实例被配置为使用当前分布式数据库版本进行操作,第二个实例被配置为使用新的更新的分布式数据库服务版本进行操作。 计算机系统接收到分布式数据库服务将被升级的指示。 然后,基于收到的指示,计算机系统将数据库副本从第一数据库服务器实例迁移到操作新的更新服务版本的第二数据库服务器实例,基本上没有用户可见的停机时间。
    • 10. 发明授权
    • Resynchronization of multiple copies of a database after a divergence in transaction history
    • 在交易历史中发生分歧后,重新同步数据库的多个副本
    • US07457829B2
    • 2008-11-25
    • US10602283
    • 2003-06-23
    • Jeffrey A. EastAndrei MarinescuMichael I. Zwilling
    • Jeffrey A. EastAndrei MarinescuMichael I. Zwilling
    • G06F17/30
    • G06F17/30578Y10S707/99932Y10S707/99953
    • The resynchronization of multiple copies of a database after a divergence in transaction history in provided. In an illustrative implementation, algorithms are provided for synchronizing multiple copies of a database upon the occurrence of a divergence in transaction history. A data environment is provided having a database and a copy. The database environment operating in a manner where the database records some transactions and the copy recording some later transactions, but neither having an up-to-date set of data or log of data changes. In operation, the database and its copy compare transaction log sequence numbers to discern the changes database and/or database copy pages. During resynchronization, the database and/or its copy sends page specific information about changes that have not been performed on each other respectively. In this manner, the data environment may be resynchronized with minimal data transmitted and without a requiring a complete restoration of the database.
    • 在提供的交易历史中发生分歧后,数据库的多个副本的重新同步。 在说明性实现中,提供了算法,用于在事务历史中发生分歧时同步数据库的多个副本。 提供了具有数据库和副本的数据环境。 数据库环境以数据库记录某些事务的方式运行,并且副本记录一些较晚的事务,但没有最新的数据集或数据日志更改。 在操作中,数据库及其复制比较事务日志序列号以识别更改数据库和/或数据库副本页面。 在重新同步期间,数据库和/或其副本分别发送关于彼此尚未执行的更改的页面特定信息。 以这种方式,数据环境可以通过传输的最小数据重新同步,而不需要数据库的完全恢复。