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1. 发明授权

US08732521B2 Detection of logical corruption in persistent storage and automatic recovery therefrom 有权
标题翻译：在持久存储中检测逻辑损坏并从中自动恢复
公开(公告)号：US08732521B2
公开(公告)日：2014-05-20
申请号：US13223221
申请日：2011-08-31
申请人： Sameer Joshi , Prasad Bagal , Rajiv Wickremesinghe , Richard Long , Harish Nandyala , Shie-rei Huang
发明人： Sameer Joshi , Prasad Bagal , Rajiv Wickremesinghe , Richard Long , Harish Nandyala , Shie-rei Huang
IPC分类号： G06F11/00
CPC分类号： G11B20/1816 , G06F11/008 , G06F11/2058 , G06F11/2064 , G06F11/2082 , G06F11/3466 , G06F2201/81 , G11B20/1883
摘要： A method, system, and computer program product for restoring blocks of data stored at a corrupted data site using two or more mirror sites. The method commences by receiving a trigger event from a component within an application server environment where the trigger event indicates detection of a corrupted data site. The trigger is classified into at least one of a plurality of trigger event types, which trigger event type signals further processing for retrieving from at least two mirror sites, a first stored data block and a second stored data block corresponding to the same logical block identifier from the first mirror site. The retrieved blocks are compared to determine a match value, and when the match value is greater than a confidence threshold, then writing good data to the corrupted data site before performing consistency checks on blocks in physical or logical proximity to the corrupted data site.
摘要翻译：一种方法，系统和计算机程序产品，用于使用两个或更多个镜像站点恢复存储在损坏的数据站点的数据块。该方法通过从触发事件指示检测到损坏的数据站点的应用程序服务器环境中的组件接收触发事件而开始。触发器被分类为多个触发事件类型中的至少一个，其触发事件类型信号进一步处理以从至少两个镜像站点检索第一存储数据块和对应于相同逻辑块标识符的第二存储数据块从第一个镜像站点。将检索到的块进行比较以确定匹配值，并且当匹配值大于置信度阈值时，则在对损坏的数据站点的物理或逻辑接近的块执行一致性检查之前，将好的数据写入损坏的数据站点。

2. 发明授权

US07617218B2 Persistent key-value repository with a pluggable architecture to abstract physical storage 有权
标题翻译：具有可插拔架构的持久键值存储库，用于抽象物理存储
公开(公告)号：US07617218B2
公开(公告)日：2009-11-10
申请号：US11404159
申请日：2006-04-13
申请人： Surojit Chatterjee , Raj Kumar , Jonathan Creighton , Alok K. Srivastava , Sameer Joshi
发明人： Surojit Chatterjee , Raj Kumar , Jonathan Creighton , Alok K. Srivastava , Sameer Joshi
IPC分类号： G06F7/00 , G06F17/30 , G06F17/00 , G06F12/00
CPC分类号： G06F17/3056 , Y10S707/99931 , Y10S707/99932 , Y10S707/99943 , Y10S707/99953
摘要： A system and techniques are described for managing key-value pairs using an architecture that does not restrict its users to any specific platform or storage subsystem. According to one aspect of the invention, the repository is portable in that the architecture need not change based on the environment and platform in which the repository is used. Rather, the portion of the architecture that is platform-specific is limited to plug-ins at a storage abstraction layer of the repository. The plug-ins expose the same storage abstraction interface to the other layers of the repository, but are implemented to interact with different platforms and storage subsystems. Consequently, in response to being ported from one platform to another, the repository may simply change the plug-in to invoke for persistent storage operations.
摘要翻译：描述了使用不将其用户限制到任何特定平台或存储子系统的架构来管理键值对的系统和技术。根据本发明的一个方面，存储库是可移植的，因为架构不需要基于使用存储库的环境和平台来改变。相反，平台特定的架构部分仅限于存储库的存储抽象层的插件。插件将相同的存储抽象接口暴露给存储库的其他层，但实现为与不同平台和存储子系统进行交互。因此，响应于从一个平台移植到另一个平台，存储库可以简单地改变插件以调用永久存储操作。

3. 发明申请

US20070078911A1 Replicating data across the nodes in a cluster environment 有权
标题翻译：在集群环境中的节点之间复制数据
公开(公告)号：US20070078911A1
公开(公告)日：2007-04-05
申请号：US11243755
申请日：2005-10-04
申请人： Ken Lee , Alok Srivastava , Sameer Joshi
发明人： Ken Lee , Alok Srivastava , Sameer Joshi
IPC分类号： G06F17/30
CPC分类号： G06F17/30575 , H04L67/1095 , H04L69/40
摘要： Techniques are provided for managing replicated data items in a cluster of shared nothing nodes. The techniques include synchronously propagating changes to one or more replicas, while asynchronously propagating changes to the remaining replicas. Because the replicas to which the change is synchronously replicated may be a relatively small percentage of the total number of replicas, the overhead associated with performing an update is reduced. The process of selecting which nodes are involved in the synchronous update operation may take into account a variety of factors, including which replicas are available at the time the update operation is being performed.
摘要翻译：提供了用于管理无共享节点的集群中的复制数据项的技术。这些技术包括将更改同步传播到一个或多个副本，同时将更改异步传播到剩余的副本。由于同步复制更改的副本可能是副本总数的相对较小的百分比，所以与执行更新相关联的开销减少。在同步更新操作中选择哪些节点的过程可以考虑各种因素，包括在执行更新操作时哪些副本可用。

4. 发明申请

US20070073855A1 Detecting and correcting node misconfiguration of information about the location of shared storage resources 有权
标题翻译：检测和纠正关于共享存储资源位置信息的节点配置错误
公开(公告)号：US20070073855A1
公开(公告)日：2007-03-29
申请号：US11237191
申请日：2005-09-27
申请人： Sameer Joshi , Surojit Chatterjee , Ken Lee , Jonathan Creighton , Alok Srivastava
发明人： Sameer Joshi , Surojit Chatterjee , Ken Lee , Jonathan Creighton , Alok Srivastava
IPC分类号： G06F15/173
CPC分类号： H04L67/306 , H04L67/18
摘要： A group of shared-storage resources are being maintained as replicas by the nodes of a cluster. Each node in the cluster maintains a set of pointers to the members of the group. As membership changes, the set of pointers should be changed accordingly. For various, reasons, the set of pointers of a node are not changed and may point to shared-storage resources that are no longer members of the group and/or not point to shared-storage resources that are members of the group. By recording a history of membership changes in the shared-storage resources, and comparing the recording to what a node thinks the shared resources should be, an incorrect set of pointers can be detected and corrective active undertaken.
摘要翻译：正在将一组共享存储资源作为集群节点的副本进行维护。集群中的每个节点都维护一组指向组成员的指针。随着会员资格的变化，应该改变指针集。对于各种原因，节点的指针集不会更改，并且可能指向不再是组成员的共享存储资源和/或不指向作为组成员的共享存储资源。通过记录共享存储资源中的成员变更历史，并将记录与节点认为共享资源相比较，可以检测到错误的指针集并进行纠正。

5. 发明授权

US06470342B1 Process of maintaining a distributed map of transaction identifiers and using hashing to access these maps 失效
标题翻译：维护事务标识符的分布式映射以及使用散列来访问这些映射的过程
公开(公告)号：US06470342B1
公开(公告)日：2002-10-22
申请号：US09267422
申请日：1999-03-12
申请人： Albert C. Gondi , Johannes Klein , Sitaram V. Lanka , Roger J. Hansen , Sameer Joshi
发明人： Albert C. Gondi , Johannes Klein , Sitaram V. Lanka , Roger J. Hansen , Sameer Joshi
IPC分类号： G06F1730
CPC分类号： G06F9/466
摘要： Systems and methods for supporting and maintaining a distributed global map of transaction identifiers at the gateway processes using a hashing algorithm configured on each application process to access the global maps. A global map of transaction identifiers that associates global transaction identifiers with remote local transaction identifiers is maintained at each gateway process. When an application process performing work for a particular transaction desires to export the transaction to a remote node, a hashing function configured on the application process is applied to the global transaction identifier associated with the particular transaction. Application of the hashing function to the global transaction identifier identifies one of the gateway processes. The global transaction identifier is stored to the global map associated with that gateway process. When the remote transaction manager associated with the remote node responds with a local transaction identifier for a local transaction initiated at the remote node, the local transaction identifier is stored to the identified gateway's global map in association with the global transaction identifier. Each application process is configured with the same hashing function so that the same gateway process will always be identified given a particular global transaction identifier. If the same or another application process desires to export to a remote node a transaction that has already been exported, the hashing function on that application process identifies the same gateway through which the transaction was originally exported.
摘要翻译：用于使用在每个应用进程上配置的散列算法在网关进程处支持和维护事务标识符的分布式全局映射以访问全局映射的系统和方法。在每个网关进程中维护将全局事务标识符与远程本地事务标识符相关联的事务标识符的全局映射。当为特定事务执行工作的应用进程期望将事务导出到远程节点时，在应用进程上配置的散列函数被应用于与特定事务相关联的全局事务标识符。将散列函数应用于全局事务标识符可识别网关进程之一。全局事务标识符存储到与该网关进程相关联的全局映射。当与远程节点相关联的远程事务管理器响应于在远程节点处发起的本地事务的本地事务标识符时，本地事务标识符与全局事务标识符相关联地存储到所识别的网关的全局映射。每个应用进程都配置相同的哈希功能，以便在给定特定的全局事务标识符的情况下，总是会识别相同的网关进程。如果相同或另一个应用程序进程需要将已经导出的事务导出到远程节点，则该应用进程上的散列函数将标识与最初导出事务相同的网关。

6. 发明申请

US20130246315A1 SYSTEMS AND METHODS FOR SEMANTIC INFERENCE AND REASONING 有权
公开(公告)号：US20130246315A1
公开(公告)日：2013-09-19
申请号：US13422962
申请日：2012-03-16
申请人： Sameer Joshi , Todd Pehle , Larry Crochet
发明人： Sameer Joshi , Todd Pehle , Larry Crochet
IPC分类号： G06N5/04 , G06F15/18
CPC分类号： G06N5/04 , G06F17/30554 , G06F17/30598 , G06N99/005
摘要： A method and system for analyzing a corpus of data artifacts is disclosed. The method comprises obtaining, by a computer, a semantic representation of the data artifacts, where the semantic representation indicates (1) entities identified in the data artifacts, and (2) semantic relationships among the entities as indicated by the data artifacts. The method further comprises clustering the data artifacts into clusters of semantically related data artifacts based on the semantic representation and inferring additional semantic relationships between pairs of the entities. The inferring comprises applying, on a cluster-by-cluster basis, a multi-tiered network of inference engines to a portion of the semantic representation corresponding to the cluster, where the multi-tiered network of inference engines includes a domain-independent inference tier and a domain-specific inference tier.

7. 发明授权

US08169856B2 Time synchronization in cluster systems 有权
标题翻译：集群系统中的时间同步
公开(公告)号：US08169856B2
公开(公告)日：2012-05-01
申请号：US12258344
申请日：2008-10-24
申请人： Vikram Rai , Alok Srivastava , Angelo Pruscino , Sameer Joshi
发明人： Vikram Rai , Alok Srivastava , Angelo Pruscino , Sameer Joshi
IPC分类号： G04C13/00 , G04C11/02 , H04L7/00 , G06F15/16
CPC分类号： G06F1/12 , H04J3/0667
摘要： Techniques are described herein for synchronizing cluster time. According to one technique, a master node is appointed in a cluster. Other “slave” nodes periodically synchronize their clocks with the master node. To synchronize its clock with the master node, a slave node sends a timestamped message to the master node, which also timestamps the message and sends the message back to the slave node, which then timestamps the message again. Based on the timestamps, the slave node is able to determine the difference between the master node's clock's time and slave node's clock's time, compensating for the message travel time between master node and slave node. Depending on various circumstances, and based on the determined difference, the slave node adjusts its clock so that the time indicated by the slave node's clock at least begins to approach more closely the time indicated by the master node's clock.
摘要翻译：这里描述了用于同步集群时间的技术。根据一种技术，在簇中指定主节点。其他“从”节点周期性地将其时钟与主节点同步。为了将其时钟与主节点同步，从节点向主节点发送时间戳消息，主节点还对消息进行时间戳，并将消息发送回从节点，从节点再次对消息进行时间戳。基于时间戳，从节点能够确定主节点的时钟和从节点的时钟时间之间的差异，从而补偿主节点和从节点之间的消息传播时间。根据各种情况，并且根据所确定的差异，从节点调整其时钟，使得从节点的时钟指示的时间至少开始接近主节点时钟指示的时间。

8. 发明授权

US08069370B1 Fault identification of multi-host complex systems with timesliding window analysis in a time series 有权
标题翻译：多时间复杂系统的故障识别与时间序列窗口分析
公开(公告)号：US08069370B1
公开(公告)日：2011-11-29
申请号：US12830069
申请日：2010-07-02
申请人： Fulu Li , Mohsin Beg , Sameer Joshi , WeiHsin Gu , Michael Zoll , Angelo Pruscino
发明人： Fulu Li , Mohsin Beg , Sameer Joshi , WeiHsin Gu , Michael Zoll , Angelo Pruscino
IPC分类号： G06F11/00
CPC分类号： G06F11/079 , G06F11/0709 , G06F11/3409 , H04L41/0636 , H04L41/064 , H04L41/16
摘要： A method and apparatus is provided for determining the most probable cause of a problem observed in a complex multi-host system. The approach relies on a probabilistic model to represent causes and effects in a complex computing system. However, complex systems include a multitude of independently operating components that can cause temporary anomalous states. To reduce the resources required to perform root cause analysis on each transient failure, as well as to raise the confidence in the most probable cause of a failure that is identified by the model, inputs to the probabilistic model are aggregated over a sliding window of values from the recent past.
摘要翻译：提供了一种用于确定在复杂的多主机系统中观察到的问题的最可能原因的方法和装置。该方法依赖于概率模型来表示复杂计算系统中的原因和影响。然而，复杂的系统包括许多可以引起临时异常状态的独立运行的组件。为了减少对每个瞬态故障执行根本原因分析所需的资源，以及提高对由模型识别的故障的最可能原因的置信度，对概率模型的输入在值的滑动窗口上聚合从最近过去。

9. 发明授权

US07693882B2 Replicating data across the nodes in a cluster environment 有权
标题翻译：在集群环境中的节点之间复制数据
公开(公告)号：US07693882B2
公开(公告)日：2010-04-06
申请号：US11243755
申请日：2005-10-04
申请人： Ken Lee , Alok K. Srivastava , Sameer Joshi
发明人： Ken Lee , Alok K. Srivastava , Sameer Joshi
IPC分类号： G06F17/30
CPC分类号： G06F17/30575 , H04L67/1095 , H04L69/40
摘要： Techniques are provided for managing replicated data items in a cluster of shared nothing nodes. The techniques include synchronously propagating changes to one or more replicas, while asynchronously propagating changes to the remaining replicas. Because the replicas to which the change is synchronously replicated may be a relatively small percentage of the total number of replicas, the overhead associated with performing an update is reduced. The process of selecting which nodes are involved in the synchronous update operation may take into account a variety of factors, including which replicas are available at the time the update operation is being performed.
摘要翻译：提供了用于管理无共享节点的集群中的复制数据项的技术。这些技术包括将更改同步传播到一个或多个副本，同时将更改异步传播到剩余的副本。由于同步复制更改的副本可能是副本总数的相对较小的百分比，所以与执行更新相关联的开销减少。在同步更新操作中选择哪些节点的过程可以考虑各种因素，包括在执行更新操作时哪些副本可用。

10. 发明申请

US20070068762A1 Adaptive control of externally controlled fan drive 有权
标题翻译：外部控制风扇驱动器的自适应控制
公开(公告)号：US20070068762A1
公开(公告)日：2007-03-29
申请号：US11235428
申请日：2005-09-26
申请人： Nikhil Bhat , Masato Yamada , Sameer Joshi , Ananthakrishnan Surianarayanan
发明人： Nikhil Bhat , Masato Yamada , Sameer Joshi , Ananthakrishnan Surianarayanan
IPC分类号： F16D31/00
CPC分类号： F01P7/042 , F16D35/024
摘要： An externally controlled fan drive includes a fluid clutch that alters torque delivered to a fan housing to rotate the fan housing at a target fan speed. An adaptive controller measures the actual fan speed and adaptively updates the control logic to compensate for variable physical characteristics of the fan device.
摘要翻译：外部控制的风扇驱动器包括流体离合器，其改变传递到风扇壳体的扭矩，以使风扇壳体以目标风扇速度旋转。自适应控制器测量实际的风扇速度，并自适应地更新控制逻辑以补偿风扇设备的可变物理特性。

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