公开(公告)号：US08046633B2

公开(公告)日：2011-10-25

申请号：US12635599

申请日：2009-12-10

申请人： Matthew A. Huras ,  Roger L. Zheng ,  Aamer Sachedina ,  James L. Finnie ,  Keriley K. Romanufa ,  Xun Xue ,  Andrew D. Buckler ,  Stewart L. Palmer

发明人： Matthew A. Huras ,  Roger L. Zheng ,  Aamer Sachedina ,  James L. Finnie ,  Keriley K. Romanufa ,  Xun Xue ,  Andrew D. Buckler ,  Stewart L. Palmer

IPC分类号： G06F11/00

CPC分类号： G06F9/526 ,  G06F11/2028 ,  G06F11/2038 ,  G06F11/2046 ,  G06F2201/825

摘要： A system and method for managing shared resources is disclosed. The system includes a primary coherency processing unit which processes lock requests from a plurality of data processing hosts, the primary coherency processing unit also storing a first current lock state information for the plurality of data processing hosts, the first current lock state information including a plurality of locks held by the plurality of data processing hosts. The system further includes a standby coherency processing unit storing fewer locks than the primary coherency processing unit, the locks stored by the standby coherency processing unit being a subset of locks included in the first current lock state information, the standby coherency unit configured to perform a plurality of activities of the primary coherency processing unit using the subset of locks in response to a failure of the primary coherency processing unit.

摘要翻译： 公开了一种用于管理共享资源的系统和方法。 该系统包括处理来自多个数据处理主机的锁定请求的主相关处理单元，该主相关处理单元还存储多个数据处理主机的第一当前锁定状态信息，第一当前锁定状态信息包括多个 由多个数据处理主机持有的锁。 所述系统还包括备用一致性处理单元，其存储比所述主相关处理单元更少的锁，由所述备用一致性处理单元存储的所述锁是包括在所述第一当前锁定状态信息中的锁的子集，所述备用一致性单元被配置为执行 响应于主要一致性处理单元的故障，主要一致性处理单元的多个活动使用锁定子集。

公开(公告)号：US08666958B2

公开(公告)日：2014-03-04

申请号：US12626714

申请日：2009-11-27

申请人： James L. Finnie ,  Ronen Grosman ,  Matthew A. Huras ,  Keriley K. Romanufa ,  Aamer Sachedina ,  Garret F. Swart ,  Xun Xue ,  Roger L. Q. Zheng

发明人： James L. Finnie ,  Ronen Grosman ,  Matthew A. Huras ,  Keriley K. Romanufa ,  Aamer Sachedina ,  Garret F. Swart ,  Xun Xue ,  Roger L. Q. Zheng

IPC分类号： G06F7/00

CPC分类号： G06F17/30362

摘要： Lock communications in a shared disk database system is reduced by several approaches: sending a single message to a lock manager for locks required for an operation and locks that will be required in the future, the operations may include row update, row delete, large scan, and row insert; performing an operation in two executions, where in a first execution locks required for the operation is determined without performing the operation, and in a second execution a single message is sent to a lock manager for the required locks and the operation is performed; in free space searching, sending a single message to a lock manager for row and page locks before a row insert is actually performed; and granting locks in an unfair manner.

摘要翻译： 在共享磁盘数据库系统中锁定通信可以通过以下几种方法进行减少：向锁管理器发送单个消息，以获得将来需要的操作所需的锁和操作可能包括行更新，行删除，大扫描 ，和行插入; 执行两次执行中的操作，其中在不执行操作的情况下确定操作所需的第一执行锁定，并且在第二执行中，单个消息被发送到锁管理器以进行所需的锁并且执行操作; 在可用空间搜索中，在实际执行行插入之前，向锁管理器发送行和页锁的单个消息; 并以不公平的方式给予锁。

公开(公告)号：US20110131192A1

公开(公告)日：2011-06-02

申请号：US12626714

申请日：2009-11-27

申请人： James L. Finnie ,  Ronen Grosman ,  Matthew A. Huras ,  Keriley K. Romanufa ,  Aamer Sachedina ,  Xun Xue ,  Roger L.Q. Zheng

发明人： James L. Finnie ,  Ronen Grosman ,  Matthew A. Huras ,  Keriley K. Romanufa ,  Aamer Sachedina ,  Xun Xue ,  Roger L.Q. Zheng

IPC分类号： G06F17/30 ,  G06F15/16

CPC分类号： G06F17/30362

摘要： Lock communications in a shared disk database system is reduced by several approaches: sending a single message to a lock manager for locks required for an operation and locks that will be required in the future, the operations may include row update, row delete, large scan, and row insert; performing an operation in two executions, where in a first execution locks required for the operation is determined without performing the operation, and in a second execution a single message is sent to a lock manager for the required locks and the operation is performed; in free space searching, sending a single message to a lock manager for row and page locks before a row insert is actually performed; and granting locks in an unfair manner.

摘要翻译： 在共享磁盘数据库系统中锁定通信可以通过以下几种方法进行减少：向锁管理器发送单个消息，以获得将来需要的操作所需的锁和操作可能包括行更新，行删除，大扫描 ，和行插入; 执行两次执行中的操作，其中在不执行操作的情况下确定操作所需的第一执行锁定，并且在第二执行中，单个消息被发送到锁管理器以进行所需的锁并且执行操作; 在可用空间搜索中，在实际执行行插入之前，向锁管理器发送行和页锁的单个消息; 并以不公平的方式给予锁。

公开(公告)号：US20110145627A1

公开(公告)日：2011-06-16

申请号：US12635599

申请日：2009-12-10

申请人： Matthew A. HURAS ,  Roger L. Zheng ,  Aamer Sachedina ,  James L. Finnie ,  Keriley K. Romanufa ,  Xun Xue ,  Andrew D. Buckler ,  Stewart L. Palmer

发明人： Matthew A. HURAS ,  Roger L. Zheng ,  Aamer Sachedina ,  James L. Finnie ,  Keriley K. Romanufa ,  Xun Xue ,  Andrew D. Buckler ,  Stewart L. Palmer

IPC分类号： G06F11/20 ,  G06F9/50

CPC分类号： G06F9/526 ,  G06F11/2028 ,  G06F11/2038 ,  G06F11/2046 ,  G06F2201/825

摘要： A system and method for managing shared resources is disclosed. The system includes a primary coherency processing unit which processes lock requests from a plurality of data processing hosts, the primary coherency processing unit also storing a first current lock state information for the plurality of data processing hosts, the first current lock state information including a plurality of locks held by the plurality of data processing hosts. The system further includes a standby coherency processing unit storing fewer locks than the primary coherency processing unit, the locks stored by the standby coherency processing unit being a subset of locks included in the first current lock state information, the standby coherency unit configured to perform a plurality of activities of the primary coherency processing unit using the subset of locks in response to a failure of the primary coherency processing unit.

摘要翻译： 公开了一种用于管理共享资源的系统和方法。 该系统包括处理来自多个数据处理主机的锁定请求的主相关处理单元，该主相关处理单元还存储多个数据处理主机的第一当前锁定状态信息，第一当前锁定状态信息包括多个 由多个数据处理主机持有的锁。 所述系统还包括备用一致性处理单元，其存储比所述主相关处理单元更少的锁，由所述备用一致性处理单元存储的所述锁是包括在所述第一当前锁定状态信息中的锁的子集，所述备用一致性单元被配置为执行 响应于主要一致性处理单元的故障，主要一致性处理单元的多个活动使用锁定子集。

公开(公告)号：US20120089735A1

公开(公告)日：2012-04-12

申请号：US12902116

申请日：2010-10-11

申请人： Gopi K. Attaluri ,  James L. Finnie ,  Stewart L. Palmer ,  Piotr M. Plachta ,  Garret F. Swart ,  Xun Xue ,  Roger L. Q. Zheng

发明人： Gopi K. Attaluri ,  James L. Finnie ,  Stewart L. Palmer ,  Piotr M. Plachta ,  Garret F. Swart ,  Xun Xue ,  Roger L. Q. Zheng

IPC分类号： G06F15/173

CPC分类号： G06F17/30362 ,  G06F9/5005 ,  G06F9/5038 ,  G06F9/524 ,  G06F9/526

摘要： In a shared data system comprising one or more primary nodes and a plurality of secondary nodes, global lock manager on a primary node manages locks for shared resources by exchanging an abstract lock state with local lock managers on the secondary nodes. The abstract lock state includes a particular representation of all of the applications on the nodes that are requesting or are granted locks. The exchange of these particular lock states instead of individual requests improves performance by increasing concurrency and reducing off-machine communication. A global deadlock detector on a node detects and resolves global deadlocks, in conjunction with local deadlock detectors on the secondary nodes.

摘要翻译： 在包括一个或多个主节点和多个次节点的共享数据系统中，主节点上的全局锁管理器通过与次节点上的本地锁管理器交换抽象锁状态来管理用于共享资源的锁。 抽象锁定状态包括节点上正在请求或被授予锁定的所有应用程序的特定表示。 这些特定锁定状态的交换而不是单独的请求通过增加并发性和减少机外通信来提高性能。 节点上的全局死锁检测器与辅助节点上的本地死锁检测器一起检测并解决全局死锁。

公开(公告)号：US08868748B2

公开(公告)日：2014-10-21

申请号：US12902116

申请日：2010-10-11

申请人： Gopi K. Attaluri ,  James L. Finnie ,  Stewart L. Palmer ,  Piotr M. Plachta ,  Garret F. Swart ,  Xun Xue ,  Roger L. Q. Zheng

发明人： Gopi K. Attaluri ,  James L. Finnie ,  Stewart L. Palmer ,  Piotr M. Plachta ,  Garret F. Swart ,  Xun Xue ,  Roger L. Q. Zheng

IPC分类号： G06F15/173 ,  G06F17/30 ,  G06F9/52 ,  G06F9/50

CPC分类号： G06F17/30362 ,  G06F9/5005 ,  G06F9/5038 ,  G06F9/524 ,  G06F9/526

摘要： In a shared data system comprising one or more primary nodes and a plurality of secondary nodes, global lock manager on a primary node manages locks for shared resources by exchanging an abstract lock state with local lock managers on the secondary nodes. The abstract lock state includes a particular representation of all of the applications on the nodes that are requesting or are granted locks. The exchange of these particular lock states instead of individual requests improves performance by increasing concurrency and reducing off-machine communication. A global deadlock detector on a node detects and resolves global deadlocks, in conjunction with local deadlock detectors on the secondary nodes.

摘要翻译： 在包括一个或多个主节点和多个次节点的共享数据系统中，主节点上的全局锁管理器通过与次节点上的本地锁管理器交换抽象锁状态来管理用于共享资源的锁。 抽象锁定状态包括节点上正在请求或被授予锁定的所有应用程序的特定表示。 这些特定锁定状态的交换而不是单独的请求通过增加并发性和减少机外通信来提高性能。 节点上的全局死锁检测器与辅助节点上的本地死锁检测器一起检测并解决全局死锁。