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1. 发明授权

US07711916B2 Storing information on storage devices having different performance capabilities with a storage system 有权
标题翻译：在存储系统内存储具有不同性能能力的存储设备上的信息
公开(公告)号：US07711916B2
公开(公告)日：2010-05-04
申请号：US11127699
申请日：2005-05-11
申请人： Sashikanth Chandrasekaran , Angelo Pruscino , James Williams
发明人： Sashikanth Chandrasekaran , Angelo Pruscino , James Williams
IPC分类号： G06F12/00
CPC分类号： G06F3/0605 , G06F3/0649 , G06F3/0685 , G06F12/0866
摘要： Techniques are described for storing portions of files on different storage devices based on the devices' respective storage class. For example, different extents from a large file within a system, application, or database may be stored on different storage devices. The storage devices may be part of a single storage system that includes some storage devices that have different performance capabilities. The decision of where, within the storage classes, to store data may be based on the access patterns of the data. Access patterns regarding file extents are tracked using respective access bits, which are set when a memory block associated with an extent is accessed via an I/O operation. In one embodiment, an access bitmap is modified to account for cached blocks of file extents.
摘要翻译：描述了用于基于设备的相应存储类将文件的部分存储在不同存储设备上的技术。例如，系统，应用程序或数据库中的大文件的不同范围可以存储在不同的存储设备上。存储设备可以是包括具有不同性能能力的一些存储设备的单个存储系统的一部分。在存储类中存储数据的位置的决定可以基于数据的访问模式。使用相应的访问位追踪关于文件扩展区的访问模式，当通过I / O操作访问与扩展区相关联的存储器块时，该访问位被设置。在一个实施例中，修改访问位图以考虑文件盘区的缓存块。

2. 发明授权

US07451290B2 Method and mechanism for on-line data compression and in-place updates 有权
标题翻译：在线数据压缩和就地更新的方法和机制
公开(公告)号：US07451290B2
公开(公告)日：2008-11-11
申请号：US11433174
申请日：2006-05-11
申请人： Sashikanth Chandrasekaran , Angelo Pruscino
发明人： Sashikanth Chandrasekaran , Angelo Pruscino
IPC分类号： G06F12/00
CPC分类号： G06F3/064 , G06F3/0608 , G06F3/0676 , G06F17/30067 , Y10S707/99942
摘要： A method and mechanism is disclosed for implementing storage and compression in a computer system. Each granular portion of a file can be individually stored in either a compressed storage unit or an uncompressed storage unit. The storage units can be allocated apriori or on an as-needed basis.
摘要翻译：公开了一种用于在计算机系统中实现存储和压缩的方法和机制。文件的每个粒度部分可以单独存储在压缩存储单元或未压缩存储单元中。存储单元可以根据需要分配或者根据需要。

3. 发明授权

US07139772B2 Ownership reassignment in a shared-nothing database system 有权
标题翻译：无共享数据库系统中的所有权重新分配
公开(公告)号：US07139772B2
公开(公告)日：2006-11-21
申请号：US10665062
申请日：2003-09-17
申请人： Roger J. Bamford , Sashikanth Chandrasekaran , Angelo Pruscino
发明人： Roger J. Bamford , Sashikanth Chandrasekaran , Angelo Pruscino
IPC分类号： G06F17/30
CPC分类号： G06F17/3038 , G06F17/30575 , Y10S707/99943
摘要： Various techniques are described for improving the performance of a shared-nothing database system in which at least two of the nodes that are running the shared-nothing database system have shared access to a disk. Specifically, techniques are provided for changing the ownership of data in a shared-nothing database without changing the location of the data on persistent storage. Because the persistent storage location for the data is not changed during a transfer of ownership of the data, ownership can be transferred more freely and with less of a performance penalty than would otherwise be incurred by a physical relocation of the data. Various techniques are also described for providing fast run-time reassignment of ownership. Because the reassignment can be performed during run-time, the shared-nothing system does not have to be taken offline to perform the reassignment. Further, the techniques describe how the reassignment can be performed with relatively fine granularity, avoiding the need to perform bulk reassignment of large amounts of data across all nodes merely to reassign ownership of a few data items on one of the nodes.
摘要翻译：描述了用于改善无共享数据库系统的性能的各种技术，其中运行无共享数据库系统的至少两个节点具有对盘的共享访问。具体来说，提供了用于在不改变永久存储器上的数据的位置的情况下改变无共享数据库中的数据的所有权的技术。由于数据的持有存储位置在数据的所有权转移期间没有改变，因此所有权可以更自由地传送，而不会因数据的物理重定位而导致的性能损失更少。还描述了用于提供所有权的快速运行时重新分配的各种技术。因为可以在运行时执行重新分配，所以无需共享系统就不必脱机执行重新分配。此外，这些技术描述了如何以相对精细的粒度来执行重新分配，避免了需要在所有节点上执行大量数据的批量重新分配，仅仅重新分配其中一个节点上的几个数据项的所有权。

4. 发明授权

US07058783B2 Method and mechanism for on-line data compression and in-place updates 有权
标题翻译：在线数据压缩和就地更新的方法和机制
公开(公告)号：US07058783B2
公开(公告)日：2006-06-06
申请号：US10246964
申请日：2002-09-18
申请人： Sashikanth Chandrasekaran , Angelo Pruscino
发明人： Sashikanth Chandrasekaran , Angelo Pruscino
IPC分类号： G06F12/00
CPC分类号： G06F3/064 , G06F3/0608 , G06F3/0676 , G06F17/30067 , Y10S707/99942
摘要： A method and mechanism is disclosed for implementing storage and compression in a computer system. Each granular portion of a file can be individually stored in either a compressed storage unit or an uncompressed storage unit. The storage units can be allocated apriori or on an as-needed basis.
摘要翻译：公开了一种用于在计算机系统中实现存储和压缩的方法和机制。文件的每个粒度部分可以单独存储在压缩存储单元或未压缩存储单元中。存储单元可以根据需要分配或者根据需要。

5. 发明授权

US06845384B2 One-phase commit in a shared-nothing database system 有权
标题翻译：无共享数据库系统中的一阶段提交
公开(公告)号：US06845384B2
公开(公告)日：2005-01-18
申请号：US10718875
申请日：2003-11-21
申请人： Roger J. Bamford , Sashikanth Chandrasekaran , Angelo Pruscino
发明人： Roger J. Bamford , Sashikanth Chandrasekaran , Angelo Pruscino
IPC分类号： G06F9/50 , G06F17/30
CPC分类号： G06F17/30575 , G06F17/30377 , Y10S707/99956
摘要： Techniques are provided for handling distributed transactions in shared-nothing database systems where one or more of the nodes have access to a shared persistent storage. Rather than coordinate the distributed transaction using a two-phase commit protocol, the coordinator of the distributed transaction uses a one-phase commit protocol with those participants that have access to the transaction status information maintained by the coordinator. The transaction status information may reside, for example, in the redo log of the coordinator. In the case that the coordinator fails, those participants can determine the state of the distributed transaction based on information stored on the shared disk. In addition, the coordinator is able to determine whether it is possible to commit the distributed transaction based on information that is stored on the shared disk by the participants, without those participants entering a formal “prepared” state.
摘要翻译：提供了用于在无共享数据库系统中处理分布式事务的技术，其中一个或多个节点可以访问共享永久存储。分布式事务的协调器不是使用两阶段提交协议来协调分布式事务，而是与那些能够访问协调器维护的事务状态信息的参与者使用一阶段提交协议。事务状态信息可以驻留在例如协调器的重做日志中。在协调器失败的情况下，这些参与者可以基于存储在共享磁盘上的信息来确定分布式事务的状态。此外，协调器能够根据参与者在共享磁盘上存储的信息来确定是否可以提交分布式事务，而不需要参与者进入正式的“准备”状态。

6. 发明授权

US07277897B2 Dynamic reassignment of data ownership 有权
标题翻译：动态重新分配数据所有权
公开(公告)号：US07277897B2
公开(公告)日：2007-10-02
申请号：US10831401
申请日：2004-04-23
申请人： Roger J. Bamford , Sashikanth Chandrasekaran , Angelo Pruscino
发明人： Roger J. Bamford , Sashikanth Chandrasekaran , Angelo Pruscino
IPC分类号： G06F17/30
CPC分类号： G06F17/30575 , G06F9/5083 , Y10S707/972 , Y10S707/99944
摘要： Various techniques are described for improving the performance of a shared-nothing database system in which at least two of the nodes that are running the shared-nothing database system have shared access to a disk. Specifically, techniques are provided for changing the ownership of data in a shared-nothing database dynamically, based on factors such as which node would be the most efficient owner relative to the performance of a particular operation. Once determined, the ownership of the data may be changed permanently to the new owner, or temporarily for the duration of the particular operation.
摘要翻译：描述了用于改善无共享数据库系统的性能的各种技术，其中运行无共享数据库系统的至少两个节点具有对盘的共享访问。具体地说，提供了基于诸如哪个节点相对于特定操作的性能来说最有效的所有者的因素来动态地改变无共享数据库中的数据的所有权的技术。一旦确定，数据的所有权可以永久地更改为新的所有者，或者在特定操作期间临时更改。

7. 发明授权

US07120651B2 Maintaining a shared cache that has partitions allocated among multiple nodes and a data-to-partition mapping 有权
标题翻译：维护具有在多个节点之间分配的分区和数据到分区映射的共享缓存
公开(公告)号：US07120651B2
公开(公告)日：2006-10-10
申请号：US10831248
申请日：2004-04-23
申请人： Roger J. Bamford , Sashikanth Chandrasekaran , Angelo Pruscino
发明人： Roger J. Bamford , Sashikanth Chandrasekaran , Angelo Pruscino
IPC分类号： G06F12/16 , G06F13/00
CPC分类号： G06F17/3048 , G06F12/0871 , G06F12/0893 , Y10S707/99952
摘要： Various techniques are described for improving the performance of a multiple node system by allocating, in two or more nodes of the system, partitions of a shared cache. A mapping is established between the data items managed by the system, and the various partitions of the shared cache. When a node requires a data item, the node first determines which partition of the shared cache corresponds to the required data item. If the data item does not currently reside in the corresponding partition, the data item is loaded into the corresponding partition even if the partition does not reside on the same node that requires the data item. The node then reads the data item from the corresponding partition of the shared cache.
摘要翻译：描述了各种技术，用于通过在系统的两个或更多个节点中分配共享高速缓存的分区来提高多节点系统的性能。在系统管理的数据项和共享缓存的各个分区之间建立映射。当节点需要数据项时，节点首先确定共享缓存的哪个分区对应于所需的数据项。如果数据项当前不在相应的分区中，则即使分区不在需要数据项的同一节点上，数据项也会被加载到相应的分区中。然后，节点从共享高速缓存的相应分区读取数据项。

8. 发明授权

US08234517B2 Parallel recovery by non-failed nodes 有权
标题翻译：非故障节点的并行恢复
公开(公告)号：US08234517B2
公开(公告)日：2012-07-31
申请号：US10831413
申请日：2004-04-23
申请人： Roger J. Bamford , Sashikanth Chandrasekaran , Angelo Pruscino
发明人： Roger J. Bamford , Sashikanth Chandrasekaran , Angelo Pruscino
IPC分类号： G06F11/00
CPC分类号： G06F17/30575
摘要： Various techniques are described for improving the performance of a shared-nothing database system in which at least two of the nodes that are running the shared-nothing database system have shared access to a disk. Specifically, techniques are provided for recovering the data owned by a failed node using multiple recovery nodes operating in parallel. The data owned by a failed node is reassigned to recovery nodes that have access to the shared disk on which the data resides. The recovery logs of the failed node are read by the recovery nodes, or by a coordinator process that distributes the recovery tasks to the recovery nodes.
摘要翻译：描述了用于改善无共享数据库系统的性能的各种技术，其中运行无共享数据库系统的至少两个节点具有对盘的共享访问。具体地，提供了用于使用并行操作的多个恢复节点来恢复由故障节点拥有的数据的技术。由故障节点拥有的数据重新分配给可访问数据所在的共享磁盘的恢复节点。故障节点的恢复日志由恢复节点或由将恢复任务分发到恢复节点的协调进程读取。

9. 发明申请

US20060259728A1 Storing information on storage devices having different performance capabilities within a storage system 有权
标题翻译：在存储系统内存储具有不同性能能力的存储设备上的信息
公开(公告)号：US20060259728A1
公开(公告)日：2006-11-16
申请号：US11127699
申请日：2005-05-11
申请人： Sashikanth Chandrasekaran , Angelo Pruscino , James Williams
发明人： Sashikanth Chandrasekaran , Angelo Pruscino , James Williams
IPC分类号： G06F12/00
CPC分类号： G06F3/0605 , G06F3/0649 , G06F3/0685 , G06F12/0866
摘要： Techniques are described for storing portions of files on different storage devices based on the devices' respective storage class. For example, different extents from a large file within a system, application, or database may be stored on different storage devices. The storage devices may be part of a single storage system that includes some storage devices that have different performance capabilities. The decision of where, within the storage classes, to store data may be based on the access patterns of the data. Access patterns regarding file extents are tracked using respective access bits, which are set when a memory block associated with an extent is accessed via an I/O operation. In one embodiment, an access bitmap is modified to account for cached blocks of file extents.
摘要翻译：描述了用于基于设备的相应存储类将文件的部分存储在不同存储设备上的技术。例如，系统，应用程序或数据库中的大文件的不同范围可以存储在不同的存储设备上。存储设备可以是包括具有不同性能能力的一些存储设备的单个存储系统的一部分。在存储类中存储数据的位置的决定可以基于数据的访问模式。使用相应的访问位追踪关于文件扩展区的访问模式，当通过I / O操作访问与扩展区相关联的存储器块时设置该访问模式。在一个实施例中，修改访问位图以考虑文件盘区的缓存块。

10. 发明申请

US20060212672A1 Method and mechanism for on-line data compression and in-place updates 有权
公开(公告)号：US20060212672A1
公开(公告)日：2006-09-21
申请号：US11433174
申请日：2006-05-11
申请人： Sashikanth Chandrasekaran , Angelo Pruscino
发明人： Sashikanth Chandrasekaran , Angelo Pruscino
IPC分类号： G06F12/00 , G06F13/00
CPC分类号： G06F3/064 , G06F3/0608 , G06F3/0676 , G06F17/30067 , Y10S707/99942
摘要： A method and mechanism is disclosed for implementing storage and compression in a computer system. Each granular portion of a file can be individually stored in either a compressed storage unit or an uncompressed storage unit. The storage units can be allocated apriori or on an as-needed basis.

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