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1. 发明申请

US20060101081A1 Distributed Database System Providing Data and Space Management Methodology 有权
标题翻译：分布式数据库系统提供数据和空间管理方法
公开(公告)号：US20060101081A1
公开(公告)日：2006-05-11
申请号：US10904263
申请日：2004-11-01
申请人： Mei-Lin Lin , Fei Zhou , Joe Francis , Srikanth Sampath , Satya Ramachandran , Gangavara Prasad Varakur
发明人： Mei-Lin Lin , Fei Zhou , Joe Francis , Srikanth Sampath , Satya Ramachandran , Gangavara Prasad Varakur
IPC分类号： G06F17/30
CPC分类号： G06F17/30362 , Y10S707/99938
摘要： A distributed database system providing data and space management methodology is described. In one embodiment, for example, a method is described for detection of deadlocks in a distributed database system comprising a plurality of servers sharing access to data, the method comprises steps of: in response to a task at a first server waiting to obtain a lock regulating access to data, sending a search request including lock information to a second server holding the lock; at the second server, examining dependencies of the task holding the lock based on the lock information received with the search request and local lock information; if the task holding the lock is waiting to obtain a lock held by an additional server, forwarding the search request and local lock information to the additional server; repeating the examining and forwarding steps until all dependencies are examined; and responding to the search request indicating whether a deadlock was detected and providing lock information found.
摘要翻译：描述了提供数据和空间管理方法的分布式数据库系统。在一个实施例中，例如，描述了一种用于在包括共享数据访问的多个服务器的分布式数据库系统中检测死锁的方法，所述方法包括以下步骤：响应于第一服务器处的等待获得锁定的任务调节对数据的访问，向包含锁定的第二服务器发送包括锁定信息的搜索请求; 在第二服务器处，基于利用搜索请求和本地锁定信息接收到的锁定信息来检查保持锁定的任务的依赖性; 如果持有锁的任务正在等待获得由附加服务器持有的锁定，则将搜索请求和本地锁定信息转发到附加服务器; 重复检查和转发步骤，直到检查所有依赖关系; 并响应搜索请求，指示是否检测到死锁并提供找到的锁定信息。

2. 发明申请

US20080294648A1 Distributed Database System Providing Data and Space Management Methodology 审中-公开
标题翻译：分布式数据库系统提供数据和空间管理方法
公开(公告)号：US20080294648A1
公开(公告)日：2008-11-27
申请号：US12037791
申请日：2008-02-26
申请人： Mei-Lin Linda Lin , Fei Zhou , Joe Francis , Srikanth Sampath , Satya N. Ramachandran , Gangavara Prasad Varakur
发明人： Mei-Lin Linda Lin , Fei Zhou , Joe Francis , Srikanth Sampath , Satya N. Ramachandran , Gangavara Prasad Varakur
IPC分类号： G06F17/30
CPC分类号： G06F16/2343 , Y10S707/99938
摘要： A distributed database system providing data and space management methodology. In one embodiment, for example, a method for transferring a data structure in cache at a first database server to a second database server in a distributed database system comprises steps of: determining a first database server having a data structure in cache in response to a request for the data structure from a second database server, the request including a request for a lock on the data structure; providing the request for the data structure to the first database server; in response, sending the data structure from the first database server to the second database server; and receiving and using the data structure at the second database server without waiting for the lock request to be explicitly granted.
摘要翻译：提供数据和空间管理方法的分布式数据库系统。在一个实施例中，例如，一种用于在第一数据库服务器将高速缓存中的数据结构传送到分布式数据库系统中的第二数据库服务器的方法包括以下步骤：响应于第一数据库服务器确定具有高速缓存中的数据结构的第一数据库服务器从第二数据库服务器请求数据结构，该请求包括对数据结构的锁定请求; 向第一数据库服务器提供数据结构的请求; 作为响应，将数据结构从第一数据库服务器发送到第二数据库服务器; 以及在第二数据库服务器处接收和使用数据结构，而不等待明确授予锁请求。

3. 发明授权

US07403945B2 Distributed database system providing data and space management methodology 有权
标题翻译：分布式数据库系统提供数据和空间管理方法
公开(公告)号：US07403945B2
公开(公告)日：2008-07-22
申请号：US10904263
申请日：2004-11-01
申请人： Mei-Lin Linda Lin , Fei Zhou , Joe Francis , Srikanth Sampath , Satya N. Ramachandran , Gangavara Prasad Varakur
发明人： Mei-Lin Linda Lin , Fei Zhou , Joe Francis , Srikanth Sampath , Satya N. Ramachandran , Gangavara Prasad Varakur
IPC分类号： G06F17/30
CPC分类号： G06F17/30362 , Y10S707/99938
摘要： A distributed database system providing data and space management methodology is described. In one embodiment, for example, a method is described for detection of deadlocks in a distributed database system comprising a plurality of servers sharing access to data, the method comprises steps of: in response to a task at a first server waiting to obtain a lock regulating access to data, sending a search request including lock information to a second server holding the lock; at the second server, examining dependencies of the task holding the lock based on the lock information received with the search request and local lock information; if the task holding the lock is waiting to obtain a lock held by an additional server, forwarding the search request and local lock information to the additional server; repeating the examining and forwarding steps until all dependencies are examined; and responding to the search request indicating whether a deadlock was detected and providing lock information found.
摘要翻译：描述了提供数据和空间管理方法的分布式数据库系统。在一个实施例中，例如，描述了一种用于在包括共享数据访问的多个服务器的分布式数据库系统中检测死锁的方法，所述方法包括以下步骤：响应于第一服务器处的等待获得锁定的任务调节对数据的访问，向包含锁定的第二服务器发送包括锁定信息的搜索请求; 在第二服务器处，基于利用搜索请求和本地锁定信息接收到的锁定信息来检查保持锁定的任务的依赖性; 如果持有锁的任务正在等待获得由附加服务器保持的锁定，则将搜索请求和本地锁定信息转发到附加服务器; 重复检查和转发步骤，直到检查所有依赖关系; 并响应搜索请求，指示是否检测到死锁并提供找到的锁定信息。

4. 发明授权

US09152666B2 Distributed database system providing data and space management methodology 有权
标题翻译：分布式数据库系统提供数据和空间管理方法
公开(公告)号：US09152666B2
公开(公告)日：2015-10-06
申请号：US12055194
申请日：2008-03-25
申请人： Mei-Lin Linda Lin , Fei Zhou , Joe Francis , Srikanth Sampath , Satya N. Ramachandran , Gangavara Prasad Varakur
发明人： Mei-Lin Linda Lin , Fei Zhou , Joe Francis , Srikanth Sampath , Satya N. Ramachandran , Gangavara Prasad Varakur
IPC分类号： G06F17/30
CPC分类号： G06F17/30362 , Y10S707/99938
摘要： A distributed database system providing data and space management methodology. In one embodiment a system for allocating resources amongst a plurality of database servers sharing resources comprises: an input module for receiving user input for allocating resources shared amongst a plurality of database servers and establishing thresholds for utilization of resources at each database server; a monitoring module at each database server for monitoring local resource utilization at each database server and sending a request for balancing resources to a second database server when local resource utilization reaches an established threshold at a first database server; and a load balancing module for receiving the request for balancing resources and determining whether to adjust resources allocated to the first database server and the second database server in response to the request.
摘要翻译：提供数据和空间管理方法的分布式数据库系统。在一个实施例中，用于在共享资源的多个数据库服务器之间分配资源的系统包括：输入模块，用于接收用于分配在多个数据库服务器之间共享的资源的用户输入，并为每个数据库服务器处的资源建立阈值; 每个数据库服务器处的监视模块，用于在本地资源利用率达到第一数据库服务器上建立的阈值时监视每个数据库服务器的本地资源利用率，并发送平衡资源到第二数据库服务器的请求; 以及负载平衡模块，用于接收所述用于平衡资源的请求，并且响应于所述请求确定是否调整分配给所述第一数据库服务器和所述第二数据库服务器的资源。

5. 发明申请

US20080235298A1 Distributed Database System Providing Data and Space Management Methodology 有权
标题翻译：分布式数据库系统提供数据和空间管理方法
公开(公告)号：US20080235298A1
公开(公告)日：2008-09-25
申请号：US12056201
申请日：2008-03-26
申请人： Mei-Lin Linda Lin , Fei Zhou , Joe Francis , Srikanth Sampath , Satya N. Ramachandran , Gangavara Prasad Varakur
发明人： Mei-Lin Linda Lin , Fei Zhou , Joe Francis , Srikanth Sampath , Satya N. Ramachandran , Gangavara Prasad Varakur
IPC分类号： G06F17/30
CPC分类号： G06F17/30362 , Y10S707/99938
摘要： A distributed database system providing data and space management methodology. In a distributed database system having an allocation page for tracking allocation and deallocation of data pages including a deallocation bit for tracking data page deallocation, a method for determining when to clear the deallocation bit during recovery comprises: during runtime operation, generating log records recording allocation and deallocation of data pages, setting the deallocation bit during deallocation of a data page by a transaction, and clearing the deallocation bit after the transaction has committed; during recovery following a failure, identifying a particular log record corresponding to the deallocation bit set during deallocation of a given data page; determining whether the deallocation of the given data page recorded in the particular log record committed prior to the failure; and if the deallocation of the given data page committed prior to the failure, clearing the deallocation bit.
摘要翻译：提供数据和空间管理方法的分布式数据库系统。在具有跟踪分配页面的分配页面的分布式数据库系统中，包括用于跟踪数据页面解除分配的分配位的数据页面的分配页面，用于在恢复期间确定何时清除分配位的方法包括：在运行时操作期间，生成日志记录记录分配和数据页面的解除分配，在通过交易解除数据页面的处理期间设置解除分配位，以及在交易提交之后清除分配位; 在故障恢复期间，识别与在给定数据页的释放期间设置的解除分配位相对应的特定日志记录; 确定在故障之前是否在特定日志记录中记录的给定数据页的释放是否被提交; 并且如果在发生故障之前提交的给定数据页面被释放，则清除分配位。

6. 发明授权

US08266111B2 Distributed database system providing data and space management methodology 有权
标题翻译：分布式数据库系统，提供数据和空间管理方法
公开(公告)号：US08266111B2
公开(公告)日：2012-09-11
申请号：US12056201
申请日：2008-03-26
申请人： Mei-Lin Linda Lin , Fei Zhou , Joe Francis , Srikanth Sampath , Satya N. Ramachandran , Gangavara Prasad Varakur
发明人： Mei-Lin Linda Lin , Fei Zhou , Joe Francis , Srikanth Sampath , Satya N. Ramachandran , Gangavara Prasad Varakur
IPC分类号： G06F7/00
CPC分类号： G06F17/30362 , Y10S707/99938
摘要： A distributed database system providing data and space management methodology. In a distributed database system having an allocation page for tracking allocation and deallocation of data pages including a deallocation bit for tracking data page deallocation, a method for determining when to clear the deallocation bit during recovery comprises: during runtime operation, generating log records recording allocation and deallocation of data pages, setting the deallocation bit during deallocation of a data page by a transaction, and clearing the deallocation bit after the transaction has committed; during recovery following a failure, identifying a particular log record corresponding to the deallocation bit set during deallocation of a given data page; determining whether the deallocation of the given data page recorded in the particular log record committed prior to the failure; and if the deallocation of the given data page committed prior to the failure, clearing the deallocation bit.
摘要翻译：提供数据和空间管理方法的分布式数据库系统。在具有跟踪分配页面的分配页面的分布式数据库系统中，包括用于跟踪数据页面解除分配的分配位的数据页面的分配页面，用于在恢复期间确定何时清除分配位的方法包括：在运行时操作期间，生成日志记录记录分配和数据页面的解除分配，在通过交易解除数据页面的处理期间设置解除分配位，以及在交易提交之后清除分配位; 在故障恢复期间，识别与在给定数据页的释放期间设置的解除分配位相对应的特定日志记录; 确定在故障之前是否在特定日志记录中记录的给定数据页的释放是否被提交; 并且如果在发生故障之前提交的给定数据页面被释放，则清除分配位。

7. 发明授权

US07783610B2 Distributed database system providing data and space management methodology 有权
标题翻译：分布式数据库系统提供数据和空间管理方法
公开(公告)号：US07783610B2
公开(公告)日：2010-08-24
申请号：US12035930
申请日：2008-02-22
申请人： Mei-Lin Linda Lin , Fei Zhou , Joe Francis , Srikanth Sampath , Satya N. Ramachandran , Gangavara Prasad Varakur
发明人： Mei-Lin Linda Lin , Fei Zhou , Joe Francis , Srikanth Sampath , Satya N. Ramachandran , Gangavara Prasad Varakur
IPC分类号： G06F17/30
CPC分类号： G06F17/30362 , Y10S707/99938
摘要： A distributed database system providing data and space management methodology. In a distributed system consisting a plurality of servers sharing access to data pages, a method for setting a timestamp indicating when modifications to data pages are made in a non-regressing fashion includes steps of: maintaining a local sequence at each server and an allocation page timestamp on an allocation page; upon allocation of a data page, applying a timestamp to the data page which is greater than the allocation page timestamp; upon modification of a given data page at a particular server, setting the timestamp on the given data page to the greater of the local sequence at the particular server and an existing timestamp already on the given data page; and when data pages are deallocated, adjusting the allocation page timestamp to a value greater than the timestamp value on any deallocated data page.
摘要翻译：提供数据和空间管理方法的分布式数据库系统。在包括共享数据页访问的多个服务器的分布式系统中，用于设置指示何时修改数据页面的时间戳以非回归方式进行的方法包括以下步骤：维护每个服务器处的本地序列和分配页面分配页面上的时间戳; 在分配数据页面时，将时间戳应用于大于分配页面时间戳的数据页面; 在修改特定服务器上的给定数据页面时，将给定数据页面上的时间戳设置为特定服务器处的本地序列中的较大者，以及已经在给定数据页面上的现有时间戳; 并且当数据页被取消分配时，将分配页面时间戳调整到大于任何取消分配数据页面上的时间戳值的值。

8. 发明申请

US20080208938A1 Distributed Database System Providing Data and Space Management Methodology 有权
标题翻译：分布式数据库系统提供数据和空间管理方法
公开(公告)号：US20080208938A1
公开(公告)日：2008-08-28
申请号：US12035930
申请日：2008-02-22
申请人： Mei-Lin Linda Lin , Fei Zhou , Joe Francis , Srikanth Sampath , Satya N. Ramachandran , Gangavara Prasad Varakur
发明人： Mei-Lin Linda Lin , Fei Zhou , Joe Francis , Srikanth Sampath , Satya N. Ramachandran , Gangavara Prasad Varakur
IPC分类号： G06F17/30
CPC分类号： G06F17/30362 , Y10S707/99938
摘要： A distributed database system providing data and space management methodology. In a distributed system comprising a plurality of servers sharing access to data pages, a method for setting a timestamp indicating when modifications to data pages are made in a non-regressing fashion comprises steps of: maintaining a local sequence at each server and an allocation page timestamp on an allocation page; upon allocation of a data page, applying a timestamp to the data page which is greater than the allocation page timestamp; upon modification of a given data page at a particular server, setting the timestamp on the given data page to the greater of the local sequence at the particular server and an existing timestamp already on the given data page; and when data pages are deallocated, adjusting the allocation page timestamp to a value greater than the timestamp value on any deallocated data page.
摘要翻译：提供数据和空间管理方法的分布式数据库系统。在包括共享数据页访问的多个服务器的分布式系统中，用于设置指示何时以非递归方式进行数据页的修改的时间戳的方法包括以下步骤：维护每个服务器处的本地序列和分配页分配页面上的时间戳; 在分配数据页面时，将时间戳应用于大于分配页面时间戳的数据页面; 在修改特定服务器上的给定数据页面时，将给定数据页面上的时间戳设置为特定服务器处的本地序列中的较大者，以及已经在给定数据页面上的现有时间戳; 并且当数据页被取消分配时，将分配页面时间戳调整到大于任何取消分配数据页面上的时间戳值的值。

9. 发明申请

US20080172429A1 Distributed Database System Providing Data and Space Management Methodology 有权
标题翻译：分布式数据库系统提供数据和空间管理方法
公开(公告)号：US20080172429A1
公开(公告)日：2008-07-17
申请号：US12055194
申请日：2008-03-25
申请人： Mei-Lin Linda Lin , Fei Zhou , Joe Francis , Srikanth Sampath , Satya N. Ramachandran , Gangavara Prasad Varakur
发明人： Mei-Lin Linda Lin , Fei Zhou , Joe Francis , Srikanth Sampath , Satya N. Ramachandran , Gangavara Prasad Varakur
IPC分类号： G06F17/00 , G06F9/46 , G06F9/44
CPC分类号： G06F17/30362 , Y10S707/99938
摘要： A distributed database system providing data and space management methodology. In one embodiment a system for allocating resources amongst a plurality of database servers sharing resources comprises: an input module for receiving user input for allocating resources shared amongst a plurality of database servers and establishing thresholds for utilization of resources at each database server; a monitoring module at each database server for monitoring local resource utilization at each database server and sending a request for balancing resources to a second database server when local resource utilization reaches an established threshold at a first database server; and a load balancing module for receiving the request for balancing resources and determining whether to adjust resources allocated to the first database server and the second database server in response to the request.
摘要翻译：提供数据和空间管理方法的分布式数据库系统。在一个实施例中，用于在共享资源的多个数据库服务器之间分配资源的系统包括：输入模块，用于接收用于分配在多个数据库服务器之间共享的资源的用户输入，并为每个数据库服务器处的资源建立阈值; 每个数据库服务器处的监视模块，用于在本地资源利用率达到第一数据库服务器上建立的阈值时监视每个数据库服务器的本地资源利用率，并发送平衡资源到第二数据库服务器的请求; 以及负载平衡模块，用于接收所述用于平衡资源的请求，并且响应于所述请求确定是否调整分配给所述第一数据库服务器和所述第二数据库服务器的资源。

10. 发明授权

US08301589B2 System and method for assignment of unique identifiers in a distributed environment 有权
标题翻译：在分布式环境中分配唯一标识符的系统和方法
公开(公告)号：US08301589B2
公开(公告)日：2012-10-30
申请号：US11691386
申请日：2007-03-26
申请人： Raj Kumar Sen , Gangavara Prasad Varakur
发明人： Raj Kumar Sen , Gangavara Prasad Varakur
IPC分类号： G06F17/30
CPC分类号： G06F17/30312 , G06F17/30575
摘要： System and method for assignment of unique identifiers in a distributed environment. In a distributed system having a plurality of nodes, a method for allocating identifiers comprises steps of: allocating a pool of identifiers for use; maintaining lists of free identifiers in the pool at participating nodes; obtaining at a first node permission to update the lists of free identifiers; upon receiving permission to update the lists, allocating for the first node a set of identifiers from the lists; updating the lists of free identifiers to reflect allocation of the set of identifiers for the first node; sending the updated lists from the first node to other participating nodes; upon receiving the updated lists of free identifiers at each other participating node, updating each other participating node's respective copy of the lists of free identifiers; and relinquishing the first node's permission to update the lists of free identifiers.
摘要翻译：在分布式环境中分配唯一标识符的系统和方法。在具有多个节点的分布式系统中，分配标识符的方法包括以下步骤：分配要使用的标识符池; 维护参与节点池中免费标识符的列表; 获得在第一节点许可更新免费标识符的列表; 在接收到更新列表的许可之后，从列表中为第一节点分配一组标识符; 更新免费标识符的列表以反映第一节点的标识符集合的分配; 将更新的列表从第一节点发送到其他参与节点; 在每个其他参与节点接收到更新的空闲标识符列表时，更新每个其他参与节点的空闲标识符列表的相应副本; 并放弃第一个节点更新免费标识符列表的权限。

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