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    • 1. 发明申请
    • Fault tolerant rolling software upgrade in a cluster
    • 集群容错滚动软件升级
    • US20060294413A1
    • 2006-12-28
    • US11168858
    • 2005-06-28
    • Frank FilzBruce JacksonSudhir Rao
    • Frank FilzBruce JacksonSudhir Rao
    • G06F11/00
    • G06F11/1433G06F8/65H04L67/1097H04L67/34H04L69/40
    • A method and system are provided for conducting a cluster software version upgrade in a fault tolerant and highly available manner. There are two phases to the upgrade. The first phase is an upgrade of the software binaries of each individual member of the cluster, while remaining cluster members remain online. Completion of the first phase is a pre-requisite to entry into the second phase. Upon completion of the first phase, a coordinated cluster transition is performed during which the cluster coordination component performs any required upgrade to its own protocols and data structures and drives all other software components through the component specific upgrade. After all software components complete their upgrades and any required data conversion, the cluster software upgrade is complete. A shared version control record is provided to manage transition of the cluster members through the cluster software component upgrade.
    • 提供了以容错和高可用性方式进行集群软件版本升级的方法和系统。 升级有两个阶段。 第一阶段是升级群集中每个成员的软件二进制文件,而剩余的群集成员保持在线状态。 完成第一阶段是进入第二阶段的先决条件。 在第一阶段完成后,执行协调的集群转换,在此期间,集群协调组件执行任何所需的升级到其自身的协议和数据结构,并通过组件特定升级驱动所有其他软件组件。 所有软件组件完成升级和任何所需的数据转换后,集群软件升级完成。 提供共享版本控制记录,以管理集群成员通过集群软件组件升级的转换。
    • 2. 发明申请
    • Policy-based, cluster-application-defined quorum with generic support interface for cluster managers in a shared storage environment
    • 基于策略的集群应用程序定义的仲裁,具有用于共享存储环境中的集群管理器的通用支持接口
    • US20070016822A1
    • 2007-01-18
    • US11182469
    • 2005-07-15
    • Sudhir RaoBruce JacksonSoumitra Sarkar
    • Sudhir RaoBruce JacksonSoumitra Sarkar
    • G06F11/00
    • G06F9/5061G06F11/1425G06F2209/505H04L67/1002H04L67/1008H04L67/322
    • A system, method and computer program product for use in a server cluster having plural server nodes implementing a server tier in a client-server computing architecture in order to determine which of two or more partitioned server subgroups has a quorum. A determination is made of relative priorities of the subgroups and a quorum is awarded to the subgroup having a highest relative priority. The relative priorities are determined by policy rules that evaluate comparative server node application state information. The server node application state information may include one or more of client connectivity, application priority, resource connectivity, processing capability, memory availability, and input/output resource availability, etc. The policy rules evaluate the application state information for each subgroup and can assign different weights to different types of application state information. An interface may be provided for receiving policy rules specified by a cluster application.
    • 一种在服务器集群中使用的系统,方法和计算机程序产品,其具有在客户端 - 服务器计算架构中实现服务器层的多个服务器节点,以便确定两个或更多个分区服务器子组中的哪一个具有仲裁。 确定子组的相对优先级,并且向具有最高相对优先级的子组授予法定人数。 相对优先级由评估比较服务器节点应用状态信息的策略规则确定。 服务器节点应用状态信息可以包括客户端连接,应用优先级,资源连接性,处理能力,存储器可用性和输入/输出资源可用性等中的一个或多个。策略规则评估每个子组的应用状态信息并且可以分配 不同权重的不同类型的应用状态信息。 可以提供用于接收由集群应用指定的策略规则的接口。
    • 3. 发明申请
    • Fault-tolerance and fault-containment models for zoning clustered application silos into continuous availability and high availability zones in clustered systems during recovery and maintenance
    • 在群集系统中将群集应用程序区域分区为连续可用性和高可用性区域的故障容错和容错模型在恢复和维护期间
    • US20070006015A1
    • 2007-01-04
    • US11170331
    • 2005-06-29
    • Sudhir RaoBruce Jackson
    • Sudhir RaoBruce Jackson
    • G06F11/00
    • G06F11/2041G06F11/1425G06F11/2028H04L41/0654
    • A cluster recovery and maintenance system, method and computer program product for use in a server cluster having plural nodes implementing a server tier in a client-server computing architecture. A first group of N active nodes each run a software stack comprising a cluster management tier and a cluster application tier that actively provides services on behalf of one or more client applications running in a client application tier on the clients. A second group of M spare nodes each run a software stack comprising a cluster management tier and a cluster application tier that does not actively provide services on behalf of client applications. First and second zones in the cluster are determined in response to an active node membership change involving one or more active nodes departing from or being added to the first group as a result of an active node failing or becoming unreachable or as a result of a maintenance operation involving an active node. The first zone is a fault tolerant zone comprising all active nodes that remain operational. The second zone is a fault containment zone comprising all active nodes participating in the membership change and at least a corresponding number of spare nodes to the extent that the membership change involves a node departure. During recovery and maintenance, fast recovery/maintenance and high application availability are implemented in the fault containment zone, while continuous application availability is maintained in the fault tolerant zone.
    • 一种用于服务器集群的集群恢复和维护系统,方法和计算机程序产品,其具有在客户端 - 服务器计算体系结构中实现服务器层的多个节点。 第一组N个活动节点每个运行包括集群管理层和集群应用层的软件堆栈,该集群应用层主动地代表在客户端上的客户端应用层中运行的一个或多个客户端应用程序提供服务。 第二组M个备用节点每个运行一个包含集群管理层的软件堆栈和不代表客户端应用程序主动提供服务的集群应用程序层。 集群中的第一和第二区域是响应于主动节点隶属关系变化而被确定的,该主动节点隶属关系改变是由于主动节点故障或变得不可达或作为维护的结果而离开或被添加到第一组的一个或多个活动节点 涉及主动节点的操作。 第一个区域是包含所有活动节点的容错区域,它们保持运行。 第二区域是包括参与成员资格变更的所有活动节点和至少相应数量的备用节点的故障容纳区域,以使得成员资格变化涉及节点离开的程度。 在恢复和维护期间,在故障控制区域中实现快速恢复/维护和高应用程序可用性,同时在容错区域中保持连续的应用程序可用性。
    • 5. 发明授权
    • Method to improve diversity gain in a cooperative spectrum sensing network
    • 提高合作频谱感知网络分集增益的方法
    • US08135424B2
    • 2012-03-13
    • US12327543
    • 2008-12-03
    • Yadunandana N. RaoApoorv ChaudhriSudhir Rao
    • Yadunandana N. RaoApoorv ChaudhriSudhir Rao
    • H04B7/00H04B15/00
    • H04B7/0452H04W72/02
    • A cooperative sensing technique (300) operates by selecting a group of subscribers (302) from a secondary system, measuring a cooperative sensing metric (306) and then using the metric to identify an achievable spatial diversity gain for the group of selected subscribers (308). Once an achievable spatial diversity gain is determined for the group (308/412), it is compared to a required spatial diversity gain (310), and if the condition is met at (310), the validated group can begin spectrum sensing (314) to identify a vacant/suitable channel for operation. If the achievable spatial diversity gain is insufficient, then a new group of users is selected (312) within the secondary system and the process repeats itself.
    • 协作感测技术(300)通过从次系统选择一组订户(302)来操作,测量协作感测度量(306),然后使用度量来识别所选择的用户组(308)的可实现的空间分集增益 )。 一旦为组确定可实现的空间分集增益(308/412),则将其与所需的空间分集增益(310)进行比较,如果在(310)满足条件,则验证组可以开始频谱感测(314 )来确定一个空的/合适的操作通道。 如果可实现的空间分集增益不足,则在辅助系统内选择一组新的用户(312),并且该过程重复。
    • 9. 发明申请
    • METHOD TO IMPROVE DIVERSITY GAIN IN A COOPERATIVE SPECTRUM SENSING NETWORK
    • 提高合作频谱感知网络中多样性增益的方法
    • US20100137014A1
    • 2010-06-03
    • US12327543
    • 2008-12-03
    • Yadunandana N. RaoApoorv ChaudhriSudhir Rao
    • Yadunandana N. RaoApoorv ChaudhriSudhir Rao
    • H04B7/00
    • H04B7/0452H04W72/02
    • A cooperative sensing technique (300) operates by selecting a group of subscribers (302) from a secondary system, measuring a cooperative sensing metric (306) and then using the metric to identify an achievable spatial diversity gain for the group of selected subscribers (308). Once an achievable spatial diversity gain is determined for the group (308/412), it is compared to a required spatial diversity gain (310), and if the condition is met at (310), the validated group can begin spectrum sensing (314) to identify a vacant/suitable channel for operation. If the achievable spatial diversity gain is insufficient, then a new group of users is selected (312) within the secondary system and the process repeats itself.
    • 协作感测技术(300)通过从次系统选择一组订户(302)来操作,测量协作感测度量(306),然后使用度量来识别所选择的用户组(308)的可实现的空间分集增益 )。 一旦为组确定可实现的空间分集增益(308/412),则将其与所需的空间分集增益(310)进行比较,如果在(310)满足条件,则验证组可以开始频谱感测(314 )来确定一个空的/合适的操作通道。 如果可实现的空间分集增益不足,则在辅助系统内选择一组新的用户(312),并且该过程重复。