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1. 发明授权

US06889253B2 Cluster resource action in clustered computer system incorporation prepare operation 失效
标题翻译：集群计算机系统集成中的集群资源动作准备运行
公开(公告)号：US06889253B2
公开(公告)日：2005-05-03
申请号：US09845592
申请日：2001-04-30
申请人： Kevin Curtis Griffin , Michael James McDermott , James Gregory Ranweiler
发明人： Kevin Curtis Griffin , Michael James McDermott , James Gregory Ranweiler
IPC分类号： G06F15/177 , G06F9/38 , G06F9/46 , G06F9/50 , G06F9/52 , G06F15/173
CPC分类号： G06F9/5061 , G06F9/3885 , G06F9/3891 , G06F2209/505
摘要： An apparatus, clustered computer system, program product and method utilize a unique prepare operation in connection with a resource action to effectively “lock out” missing or inactive cluster entities such as nodes and cluster objects from rejoining a clustered computer system subsequent to the resource action. The prepare operation includes the modification of one or more cluster configuration parameters associated with a plurality of entities in a clustered computer system, such that any such cluster entity that is active during the prepare operation accepts the modifications, while any such cluster entity that is inactive during the prepare operation does not accept the modifications. By modifying cluster configuration parameters for active cluster entities, attempts by previously-inactive cluster entities to activate or rejoin clustering subsequent to resource actions will generally fail due to an incorrect or stale cluster configuration parameters for such entities, and as a result, such entities will be effectively blocked from being accepted into the clustered computer system.
摘要翻译：一种装置，集群计算机系统，程序产品和方法利用与资源动作结合的唯一准备操作，以在资源动作之后有效地“锁定”丢失或不活动的集群实体（例如节点和集群对象）来重新连接集群计算机系统。准备操作包括修改与集群计算机系统中的多个实体相关联的一个或多个集群配置参数，使得在准备操作期间活动的任何这样的集群实体接受修改，而任何此类集群实体处于非活动状态在准备操作期间不接受修改。通过修改活动集群实体的集群配置参数，先前不活动的集群实体在资源操作之后激活或重新加入集群的尝试通常会由于这些实体的不正确或过期的集群配置参数而失败，因此，这些实体将被有效地阻止被接收到集群计算机系统中。

2. 发明授权

US5796999A Method and system for selectable consistency level maintenance in a resilent database system 失效
标题翻译：在弹性数据库系统中可选择一致性级别维护的方法和系统
公开(公告)号：US5796999A
公开(公告)日：1998-08-18
申请号：US228319
申请日：1994-04-15
申请人： Alain Charles Azagury , Danny Dolev , German Goft , John Michael Marberg , James Gregory Ranweiler , Julian Satran
发明人： Alain Charles Azagury , Danny Dolev , German Goft , John Michael Marberg , James Gregory Ranweiler , Julian Satran
IPC分类号： G06F12/00 , G06F11/14 , G06F17/30 , G06F17/00
CPC分类号： G06F17/30371 , G06F11/2097 , G06F11/2094 , G06F2201/80 , Y10S707/99953
摘要： In a resilient database system which includes a journaled database which is implemented at one or more locations within a distributed data processing system, multiple diverse consistency levels are specified which each detail a level of consistency to be maintained between a primary database and a replica database. A user is then permitted to select a particular level of consistency for each replica database. Thereafter, each update to a record within the primary database is utilized to initiate an update to the corresponding record within each replica database in a manner which is consistent with the selected level of consistency for that replica database. In this manner, a replica database which is fully consistent with the primary database may be provided for seamless switchover in the event of a primary database failure, while a second replica database may be provided to respond to queries by applications which do not require fully consistent data, greatly enhancing the efficiency of access to that database.
摘要翻译：在包括在分布式数据处理系统中的一个或多个位置处实现的日志数据库的弹性数据库系统中，指定多个不同一致性级别，每个级别详细描述要在主数据库和副本数据库之间维护的一致性级别。然后允许用户为每个副本数据库选择特定级别的一致性。此后，利用主数据库中的记录的每次更新以与该副本数据库的所选一致性水平一致的方式发起对每个副本数据库内的对应记录的更新。以这种方式，可以提供与主数据库完全一致的副本数据库，用于在主数据库故障的情况下进行无缝切换，而可以提供第二副本数据库以响应不需要完全一致的应用的查询数据，大大提高了访问该数据库的效率。

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