公开(公告)号：US6049809A

公开(公告)日：2000-04-11

申请号：US739948

申请日：1996-10-30

申请人： Balan S. Raman ,  Arnold S. Miller ,  Dave D. Straube ,  Shioupyn Shen

发明人： Balan S. Raman ,  Arnold S. Miller ,  Dave D. Straube ,  Shioupyn Shen

IPC分类号： G06F17/30 ,  H04L29/06 ,  H04L29/08

CPC分类号： G06F17/30212 ,  H04L67/1095 ,  Y10S707/99953 ,  Y10S707/99954

摘要： A system and method of efficiently replicating data structures in a distributed system of replicas. Each replica in the distributed system maintains a cursor indicative of the extent to which other replicas in the system are consistent with one another. By examining the information in its cursor, a destination replica requesting replication from a source replica is able to determine the extent to which it has been made consistent with that source replica via indirect paths, thus potentially improving the starting point of replication. The source replica similarly examines its cursor to potentially improve the starting point of replication with respect to the starting point requested by the destination replica. In this manner, redundant information transmitted from a source replica when replicating a destination replica is reduced. The reduction in the amount of transmitted replication data is particularly appreciable when the replication topology of the system is changed such as by adding a new connection between existing replicas or by adding a new replica to the system.

摘要翻译： 在复制品的分布式系统中有效地复制数据结构的系统和方法。 分布式系统中的每个副本都保留一个光标，指示系统中其他副本彼此一致的程度。 通过检查其游标中的信息，从源副本请求复制的目标副本能够通过间接路径确定其与该源副本一致的程度，从而潜在地改善复制的起始点。 源副本类似地检查其游标以相对于目的地副本请求的起始点潜在地改进起始点。 以这种方式，减少了在复制目的地复本时从源副本发送的冗余信息。 当系统的复制拓扑发生变化时，例如通过在现有副本之间添加新连接或通过向系统添加新副本，传输的复制数据量的减少特别明显。

公开(公告)号：US07814499B2

公开(公告)日：2010-10-12

申请号：US11275116

申请日：2005-12-12

申请人： Dave D. Straube ,  Aaron M. Contorer ,  Arnold S. Miller ,  Balan S. Raman ,  Pradyumna K. Misra ,  Michael R. C. Seaman

发明人： Dave D. Straube ,  Aaron M. Contorer ,  Arnold S. Miller ,  Balan S. Raman ,  Pradyumna K. Misra ,  Michael R. C. Seaman

IPC分类号： G06F9/44

CPC分类号： G06F9/54 ,  G06F17/30215

摘要： A system and method for expediting the replication of at least one specified object to a replica in a distributed computer system. A source object of a source replica determines that it has an urgent change to propagate through the distributed system, and informs a replication facility at the source replica of the urgent change. The facility extracts, or is provided with, the change information from that object, and the source replica communicates information representative of the change to a destination replica. A replication facility at the destination replica provides the change information to a destination replica object, which uses the information to make itself consistent with the source replica object.

公开(公告)号：US07200847B2

公开(公告)日：2007-04-03

申请号：US10154014

申请日：2002-05-23

申请人： Dave D. Straube ,  Aaron M. Contorer ,  Arnold S. Miller ,  Balan S. Raman ,  Pradyumna K. Misra ,  Michael R. C. Seaman

发明人： Dave D. Straube ,  Aaron M. Contorer ,  Arnold S. Miller ,  Balan S. Raman ,  Pradyumna K. Misra ,  Michael R. C. Seaman

IPC分类号： G06F9/46

CPC分类号： G06F9/54 ,  G06F17/30215

摘要： A system and method for expediting the replication of at least one specified object to a replica in a distributed computer system. A source object of a source replica determines that it has an urgent change to propagate through the distributed system, and informs a replication facility at the source replica of the urgent change. The facility extracts, or is provided with, the change information from that object, and the source replica communicates information representative of the change to a destination replica. A replication facility at the destination replica provides the change information to a destination replica object, which uses the information to make itself consistent with the source replica object.

摘要翻译： 一种用于在分布式计算机系统中加速复制至少一个指定对象到副本的系统和方法。 源副本的源对象确定它具有通过分布式系统传播的紧急更改，并在紧急更改的源副本上通知复制设备。 该设施从该对象提取或提供变更信息，并且源副本将表示该更改的信息传达到目的地副本。 目标副本上的复制工具将更改信息提供给目标副本对象，该对象使用该信息使其自身与源副本对象一致。

公开(公告)号：US07788678B2

公开(公告)日：2010-08-31

申请号：US11688760

申请日：2007-03-20

申请人： Dave D. Straube ,  Aaron M. Contorer ,  Arnold S. Miller ,  Balan S. Raman ,  Pradyumna K. Misra ,  Michael R. C. Seaman

发明人： Dave D. Straube ,  Aaron M. Contorer ,  Arnold S. Miller ,  Balan S. Raman ,  Pradyumna K. Misra ,  Michael R. C. Seaman

IPC分类号： G06F9/44 ,  G06F17/00

CPC分类号： G06F9/54 ,  G06F17/30215

摘要： A system and method for expediting the replication of at least one specified object to a replica in a distributed computer system. A source object of a source replica determines that it has an urgent change to propagate through the distributed system, and informs a replication facility at the source replica of the urgent change. The facility extracts, or is provided with, the change information from that object, and the source replica communicates information representative of the change to a destination replica. A replication facility at the destination replica provides the change information to a destination replica object, which uses the information to make itself consistent with the source replica object.

摘要翻译： 一种用于在分布式计算机系统中加速复制至少一个指定对象到副本的系统和方法。 源副本的源对象确定它具有通过分布式系统传播的紧急更改，并在紧急更改的源副本上通知复制设备。 该设施从该对象提取或提供变更信息，并且源副本将表示该更改的信息传达到目的地副本。 目标副本上的复制工具将更改信息提供给目标副本对象，该对象使用该信息使其自身与源副本对象一致。

公开(公告)号：US07430744B2

公开(公告)日：2008-09-30

申请号：US11408654

申请日：2006-04-21

申请人： Dave D. Straube ,  Aaron M. Contorer ,  Arnold S. Miller ,  Balan S. Raman ,  Pradyumna K. Misra ,  Michael R. C. Seaman

发明人： Dave D. Straube ,  Aaron M. Contorer ,  Arnold S. Miller ,  Balan S. Raman ,  Pradyumna K. Misra ,  Michael R. C. Seaman

IPC分类号： G06F9/46

CPC分类号： G06F9/54 ,  G06F17/30215

摘要： A system and method for expediting the replication of at least one specified object to a replica in a distributed computer system. A source object of a source replica determines that it has an urgent change to propagate through the distributed system, and informs a replication facility at the source replica of the urgent change. The facility extracts, or is provided with, the change information from that object, and the source replica communicates information representative of the change to a destination replica. A replication facility at the destination replica provides the change information to a destination replica object, which uses the information to make itself consistent with the source replica object.

摘要翻译： 一种用于在分布式计算机系统中加速复制至少一个指定对象到副本的系统和方法。 源副本的源对象确定它具有通过分布式系统传播的紧急更改，并在紧急更改的源副本上通知复制设备。 该设施从该对象提取或提供变更信息，并且源副本将表示该更改的信息传达到目的地副本。 目标副本上的复制工具将更改信息提供给目标副本对象，该对象使用该信息使其自身与源副本对象一致。

公开(公告)号：US06412017B1

公开(公告)日：2002-06-25

申请号：US08673929

申请日：1996-07-01

申请人： Dave D. Straube ,  Aaron M. Contorer ,  Arnold S. Miller ,  Balan S. Raman ,  Pradyumna K. Misra ,  Michael R. C. Seaman

发明人： Dave D. Straube ,  Aaron M. Contorer ,  Arnold S. Miller ,  Balan S. Raman ,  Pradyumna K. Misra ,  Michael R. C. Seaman

IPC分类号： G06F946

CPC分类号： G06F9/54 ,  G06F17/30215

摘要： A system and method for expediting the replication of at least one specified object to a replica in a distributed computer system. A source object of a source replica determines that it has an urgent change to propagate through the distributed system, and informs a replication facility at the source replica of the urgent change. The facility extracts, or is provided with, the change information from that object, and the source replica communicates information representative of the change to a destination replica. A replication facility at the destination replica provides the change information to a destination replica object, which uses the information to make itself consistent with the source replica object.

公开(公告)号：US5968121A

公开(公告)日：1999-10-19

申请号：US910412

申请日：1997-08-13

申请人： Keith W. Logan ,  Pradyumna K. Misra ,  Paul J. Leach ,  Clifford P. Van Dyke ,  Dave D. Straube ,  Arnold S. Miller

发明人： Keith W. Logan ,  Pradyumna K. Misra ,  Paul J. Leach ,  Clifford P. Van Dyke ,  Dave D. Straube ,  Arnold S. Miller

IPC分类号： G06F12/00 ,  G06F15/00 ,  G06F17/30 ,  H04L29/06 ,  H04L29/08 ,  H04L29/12

CPC分类号： H04L29/12047 ,  H04L29/12009 ,  H04L41/0893 ,  H04L41/12 ,  H04L61/15 ,  H04L67/1002 ,  H04L67/1008 ,  H04L67/101 ,  H04L67/1021 ,  H04L67/16 ,  H04L67/18 ,  H04L41/0233 ,  H04L67/1095 ,  H04L69/329

摘要： A network directory and naming service include fields for identifying instances of network resources and other objects by both logical and topological grouping. This combination of information facilitates automated efficient decision making with regard to replication of resources and updating the replicas in response to changes. The combination of logical and topological identification for resources also facilitates selection of a close replica in instances where a client requests access to a resource, such as a server, for which communicatively local and remote instances exist.

摘要翻译： 网络目录和命名服务包括用于通过逻辑和拓扑分组来标识网络资源和其他对象的实例的字段。 信息的这种组合促进了关于资源的复制和响应于变化来更新副本的自动化的有效决策。 资源的逻辑和拓扑识别的组合还有助于在客户端请求访问诸如服务器的资源的实例中选择紧密副本，对于通信本地和远程实例存在的资源。

公开(公告)号：US5519855A

公开(公告)日：1996-05-21

申请号：US181899

申请日：1994-01-14

申请人： Yuval Neeman ,  Peter J. Cook ,  Arnold S. Miller ,  Noa Zalic ,  Balan S. Raman ,  David S. Montague ,  Dave Straube

发明人： Yuval Neeman ,  Peter J. Cook ,  Arnold S. Miller ,  Noa Zalic ,  Balan S. Raman ,  David S. Montague ,  Dave Straube

IPC分类号： G06F12/00 ,  G06F17/30 ,  G06F17/00

CPC分类号： G06F17/30067 ,  Y10S707/99933 ,  Y10S707/99939

摘要： A system provides support for the use of summary catalog data structures. In particular, the system defines such summary catalogs as data structures and provides standardized methods for operating on the data structures. The summary catalogs provide a convenient and highly available mechanism for obtaining information regarding files in the system. The summary catalogs are closely tied to queries in that the summary catalogs store query results. The summary catalogs may be encapsulated into objects that hold selected properties that are derived from other objects in a query or may be formed by other mechanisms. Copies of a summary catalog may be kept consistent using replication that propagates changes. In addition, consistency of summary catalogs with the source objects from which they originated may be maintained.

摘要翻译： 系统提供对使用汇总目录数据结构的支持。 特别地，系统将这样的摘要目录定义为数据结构，并提供用于对数据结构进行操作的标准化方法。 摘要目录提供了一种方便且高度可用的获取系统文件信息的机制。 摘要目录与查询密切相关，因为摘要目录存储查询结果。 摘要目录可以被封装到保存从查询中的其他对象导出的所选属性的对象中，或者可以由其他机制形成。 可以使用传播更改的复制来保持一致的摘要目录的副本。 此外，可以维护汇总目录与源文件来源的一致性。

公开(公告)号：US07653700B1

公开(公告)日：2010-01-26

申请号：US09714406

申请日：2000-11-16

申请人： Pradeep Bahl ,  Feng Sun ,  Bernard D. Aboda ,  Arnold S. Miller

发明人： Pradeep Bahl ,  Feng Sun ,  Bernard D. Aboda ,  Arnold S. Miller

IPC分类号： G06F15/16

CPC分类号： H04L67/1008 ,  H04L29/12009 ,  H04L29/12047 ,  H04L43/00 ,  H04L43/0852 ,  H04L43/0882 ,  H04L61/15 ,  H04L67/101 ,  H04L67/1038

摘要： Presented is a system and a method for load balancing multiple globally-dispersed servers based on client-centric performance criteria. The infrastructure of the system includes load balancing domain name servers (DNS-LBs) deployed in close physical proximity to the Internet service providers' points of presence. The DNS-LBs are then able to monitor the performance of the servers from a location close to the clients, which allows the DNS-LBs to select a server that will yield the best performance from that location for the client. A second level of the infrastructure utilizes domain name servers (DNS-Bs) that are deployed on the Internet backbones and regional provides. The authoritative domain name servers (DNS-As) for the servers to be load balanced refer all name queries to these DNS-Bs. The DNS-Bs then refer the queries to one of the DNS-LBs based on a mapping of the DNS-ISP address to its physically proximate DNS-LB. The DNS-LB then returns the IP address of the server that will provide the best performance from that location.

摘要翻译： 提出了一种基于以客户为中心的性能标准来负载平衡多个全局分散服务器的系统和方法。 系统的基础设施包括负载平衡域名服务器（DNS-LB），部署在与Internet服务提供商的存在点紧密的物理接近处。 然后，DNS-LB能够从靠近客户端的位置监控服务器的性能，从而允许DNS-LB选择将为客户端从该位置获得最佳性能的服务器。 基础架构的第二级使用部署在互联网主干和区域提供的域名服务器（DNS-B）。 要负载平衡的服务器的权威域名服务器（DNS-As）将所有名称查询引用到这些DNS-B。 然后，DNS-B根据DNS-ISP地址与其物理上接近的DNS-LB的映射关系，将查询引用到DNS-LB之一。 然后，DNS-LB返回将从该位置提供最佳性能的服务器的IP地址。

公开(公告)号：US5999711A

公开(公告)日：1999-12-07

申请号：US277144

申请日：1994-07-18

申请人： Pradyumna K. Misra ,  Arnold S. Miller ,  Richard B. Ward

发明人： Pradyumna K. Misra ,  Arnold S. Miller ,  Richard B. Ward

IPC分类号： G06F21/20 ,  G06F13/00 ,  G06F21/00 ,  G09C1/00 ,  H04L9/32 ,  H04L29/06 ,  G06F11/00 ,  G06F13/14

CPC分类号： H04L63/0823 ,  G06F21/33 ,  G06F21/6236 ,  G06Q20/3821 ,  H04L63/12 ,  H04L63/0428

摘要： Logon certificates are provided to support disconnected operation within the distributed system. Each logon certificate is a secure package holding credentials information sufficient to establish the identity and rights and privileges for a user/machine in a domain that is not their home domain. When a user/machine attempts to connect to the system at a domain other than the home domain of the user/machine, the user/machine presents a logon certificate that evidences his credentials. The domain where the user/machine attempts to connect to the system, decrypts and unseals the secure package as required to obtain the credentials information contained therein. If the user/machine has sufficient credentials, the user/machine is permitted to connect to the system. If the user/machine lacks sufficient credentials, the user/machine is not permitted to connect to the system.

摘要翻译： 提供登录证书以支持分布式系统中的断开连接操作。 每个登录证书都是一个安全的软件包，其中包含足够的证书信息，可以为不是其归属域的域中的用户/计算机建立身份和权限和权限。 当用户/机器尝试在除用户/机器的归属域之外的域连接到系统时，用户/机器呈现证明其凭证的登录证书。 用户/机器尝试连接到系统的域，根据需要解密和解密安全包，以获取其中包含的凭据信息。 如果用户/机器具有足够的凭证，则允许用户/机器连接到系统。 如果用户/机器缺少足够的凭证，则不允许用户/机器连接到系统。