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11. 发明授权

US5603026A Application-specific conflict resolution for weakly consistent replicated databases 失效
标题翻译：对于弱一致的复制数据库，应用程序特定的冲突解决方案
公开(公告)号：US5603026A
公开(公告)日：1997-02-11
申请号：US352014
申请日：1994-12-07
申请人： Alan J. Demers , Karin Petersen , Michael J. Spreitzer , Douglas B. Terry , Marvin M. Theimer , Brent B. Welch
发明人： Alan J. Demers , Karin Petersen , Michael J. Spreitzer , Douglas B. Terry , Marvin M. Theimer , Brent B. Welch
IPC分类号： G06F12/00 , G06F17/30 , G06F7/20
CPC分类号： G06F17/30356 , G06F17/30377 , Y10S707/99938
摘要： Write operations for weakly consistent replicated database systems have embedded application-specific merge procedures that are invoked for resolving conflicts whenever it is found that the related write operation conflicts with the current state of a given instance of such a database. The effect of executing such a merge procedure is deterministic for any state of the given instance of the database happens to be in when the merge procedure is executed.
摘要翻译：针对弱一致的复制数据库系统的写入操作具有嵌入的特定于应用程序的合并过程，用于在发现相关写操作与此类数据库的给定实例的当前状态冲突时调用以解决冲突。执行这样的合并过程的效果是确定性的，当执行合并过程时，数据库的给定实例的任何状态恰好处于。

12. 发明授权

US5671407A Application-specific conflict detection for weakly consistent replicated databases 失效
标题翻译：针对弱一致的复制数据库的特定于应用程序的冲突检测
公开(公告)号：US5671407A
公开(公告)日：1997-09-23
申请号：US351841
申请日：1994-12-07
申请人： Alan J. Demers , Karin Petersen , Michael J. Spreitzer , Douglas B. Terry , Marvin M. Theimer , Brent B. Welch
发明人： Alan J. Demers , Karin Petersen , Michael J. Spreitzer , Douglas B. Terry , Marvin M. Theimer , Brent B. Welch
IPC分类号： G06F12/00 , G06F9/46 , G06F15/16 , G06F17/30 , G06F7/20
CPC分类号： G06F17/30356 , G06F17/30377 , Y10S707/99938 , Y10S707/99952 , Y10S707/99953
摘要： Write operations for weakly consistent replicated database systems have application-specific embedded dependency queries and related descriptions of the results that are expected to be returned when the respective dependency queries are run against the database. The dependency queries are arbitrary queries that are provided by the application to satisfy the requirements of the application. Write operations that conflict with the current state of any given instance of such a database are detected by comparing (a) the results that are returned when the dependency queries for those writes are run against the given instance of the database with (b) the results that are expected to be returned.
摘要翻译：针对弱一致的复制数据库系统的写入操作具有应用程序特定的嵌入式依赖性查询和对相应的依赖性查询针对数据库运行时预期返回的结果的相关描述。依赖关系查询是由应用程序提供以满足应用程序需求的任意查询。通过比较（a）当针对这些写入的依赖性查询针对数据库的给定实例运行时返回的结果（b）结果，检测到与这种数据库的任何给定实例的当前状态冲突的写入操作预计将退回。

13. 发明授权

US5581754A Methodology for managing weakly consistent replicated databases 失效
标题翻译：用于管理弱一致的复制数据库的方法
公开(公告)号：US5581754A
公开(公告)日：1996-12-03
申请号：US352012
申请日：1994-12-07
申请人： Douglas B. Terry , Marvin M. Theimer , Alan J. Demers , Karin Petersen , Michael J. Spreitzer , Brent B. Welch
发明人： Douglas B. Terry , Marvin M. Theimer , Alan J. Demers , Karin Petersen , Michael J. Spreitzer , Brent B. Welch
IPC分类号： G06F12/00 , G06F17/30 , G06F7/20
CPC分类号： G06F17/30356 , G06F17/30377 , Y10S707/99938 , Y10S707/99939
摘要： Write operations for weakly consistent replicated database systems have embedded conflict detection and conflict resolution procedures for identifying and resolving, respectively conflicts between such write operations and the current state of any given instance of such a database. These write operations are committed to a firm execution order by the host for one instance of such a database, and this execution order propagates to the other instances of the database. Accordingly, a write log distinguishes between the writes that are known to be committed to a firm execution order (the "tentative writes") is maintained for each instance of the database, thereby enabling the user to explicitly identifying the stable data and the potentially unstable data in any given instance of the database. Furthermore, provision is made for enabling users to select from a set of predefined consistency guarantees across all instances of such a database for any given session.
摘要翻译：用于弱一致复制数据库系统的写入操作具有嵌入式冲突检测和冲突解决程序，用于识别和解决这种写入操作与此类数据库的任何给定实例的当前状态之间的冲突。这些写入操作由主机对这种数据库的一个实例进行强制执行，并且该执行顺序传播到数据库的其他实例。因此，写入日志区分已知被提交到坚定的执行顺序的写入（“暂时写入”）被维护用于数据库的每个实例，从而使得用户可以明确地识别稳定数据和潜在的不稳定任何给定的数据库实例中的数据。此外，还提供了允许用户从任何给定会话的这种数据库的所有实例的一组预定义的一致性保证中进行选择。

14. 发明授权

US5581753A Method for providing session consistency guarantees 失效
标题翻译：提供会话一致性保证的方法
公开(公告)号：US5581753A
公开(公告)日：1996-12-03
申请号：US314971
申请日：1994-09-28
申请人： Douglas B. Terry , Alan J. Demers , Karin Petersen , Michael J. Spreitzer , Marvin M. Theimer , Brent B. Welch
发明人： Douglas B. Terry , Alan J. Demers , Karin Petersen , Michael J. Spreitzer , Marvin M. Theimer , Brent B. Welch
IPC分类号： G06F12/00 , G06F11/14 , G06F13/00 , G06F17/30
CPC分类号： G06F17/30371 , G06F11/1402 , Y10S707/99952
摘要： The present invention provides client-selected consistency guarantees to clients of a weakly consistent replicated database on a per "session" basis. The clients have access to utilities which allow the clients to, individually or collectively, define a "session" over which the selected guarantees are enforced. A "session" is broadly defined as a sequence of logically related Reads and Writes to the database. Sessions are initiated and terminated substantially independently of other sessions which may exist concurrently. Clients are allowed, however, to clone sessions and/or merge sessions with other clients. Clients select a minimum relevant subset of guarantees from among a set of pre-defined consistency guarantees, where "relevancy" is a client determined factor. At any given time, the system may be enforcing a number of different combinations of consistency guarantees. The guarantees ensure that all clients participating in a particular session view the database as having certain conditions of data consistency--the consistency of which is only provided with respect to the participants' Read and Write requests. Clients are allowed to downgrade their selected guarantees during the course of their sessions. One implementation of the present invention permits the selection of any one of four consistency guarantees.
摘要翻译：本发明在每个“会话”的基础上向弱一致的复制数据库的客户端提供客户选择的一致性保证。客户可以访问实用程序，这些实用程序允许客户单独或集体定义执行所选保证的“会话”。 “会话”被广泛地定义为数据库的逻辑相关的读取和写入序列。会话的启动和终止基本上独立于可能同时存在的其他会话。但是，允许客户端克隆会话和/或与其他客户端合并会话。客户从一组预定义的一致性保证中选择最小相关的担保子集，其中“相关性”是客户确定的因素。在任何给定的时间，系统可能会执行许多不一致性保证的组合。保证确保参与特定会话的所有客户都将数据库视为具有某些数据一致性的条件 - 其一致性仅针对参与者的读取和写入请求提供。允许客户在会议过程中降级其选定的担保。本发明的一个实现允许选择四个一致性保证中的任何一个。

15. 发明申请

US20090240719A1 ACCUMULATING STAR KNOWLEDGE IN REPLICATED DATA PROTOCOL 有权
标题翻译：统计数据协议中的星号知识
公开(公告)号：US20090240719A1
公开(公告)日：2009-09-24
申请号：US12053632
申请日：2008-03-24
申请人： Venugopalan Ramasubramanian , Thomas L. Rodeheffer , Douglas B. Terry , Meg Walraed-Sullivan , Edward P. Wobber
发明人： Venugopalan Ramasubramanian , Thomas L. Rodeheffer , Douglas B. Terry , Meg Walraed-Sullivan , Edward P. Wobber
IPC分类号： G06F17/30
CPC分类号： G06F17/30575
摘要： A distributed system includes full and partial replicas of a set of data items that may be inserted, modified, or deleted by any replica. Replicas may occasionally synchronize with other arbitrarily chosen replicas to learn about updates. A replica's knowledge includes of one or more knowledge fragments, where each fragment indicates a set of items. A type of knowledge fragment, called a star knowledge fragment, contains versions associated with all items in the system. Star knowledge fragments are compact because the set of items stored at a replica need not be explicitly listed. Once all replicas know of all updates in the system, partial and full replicas will have the same compact star knowledge fragment.
摘要翻译：分布式系统包括可以由任何副本插入，修改或删除的一组数据项的完整和部分副本。副本可能偶尔与其他任意选择的副本进行同步，以了解更新。副本的知识包括一个或多个知识片段，其中每个片段指示一组项目。称为星型知识片段的知识片段类型包含与系统中所有项目相关联的版本。明星知识片段是紧凑的，因为存储在副本中的项目集不需要被明确列出。一旦所有副本都知道系统中的所有更新，部分和完全副本将具有相同的紧凑型星级知识片段。

16. 发明申请

US20110016100A1 MULTIPLE FIDELITY LEVEL ITEM REPLICATION AND INTEGRATION 审中-公开
标题翻译：多重FIDELITY水平项目的复制和整合
公开(公告)号：US20110016100A1
公开(公告)日：2011-01-20
申请号：US12503871
申请日：2009-07-16
申请人： Venugopalan Ramasubramanian , Thomas L. Rodeheffer , Douglas B. Terry , Kaushik Veeraraghavan , Edward P. Wobber
发明人： Venugopalan Ramasubramanian , Thomas L. Rodeheffer , Douglas B. Terry , Kaushik Veeraraghavan , Edward P. Wobber
IPC分类号： G06F17/30
CPC分类号： G06F16/1787 , G06F16/184
摘要： A distributed system synchronizes replica devices with respect to items that may be inserted, modified, or deleted by any of the replica devices. Replicas may synchronize with other replicas to learn about updates to items. Each replica device may include a high-fidelity replication platform and/or a low-fidelity replication platform. The low-fidelity replication platforms may synchronize low-fidelity versions of items among the replica devices, and the high-fidelity replication platforms may synchronize high-fidelity versions of items among the replica devices. Each replica device may include a fidelity manager that copies high-fidelity versions of items from the high-fidelity replication platform, generates low-fidelity versions of the items from the high-fidelity versions of the items, and adds the low-fidelity versions of the items to the low-fidelity replication platforms. The fidelity managers may further integrate changes made to low-fidelity versions of items into the corresponding high-fidelity versions of the items.
摘要翻译：分布式系统相对于可由任何复制设备插入，修改或删除的项目来同步复制设备。副本可能与其他副本同步，以了解项目的更新。每个复制设备可以包括高保真复制平台和/或低保真复制平台。低保真复制平台可以在副本设备之间同步低保真版本的项目，并且高保真复制平台可以在副本设备之间同步高保真版本的项目。每个复制设备可以包括保真管理器，其从高保真复制平台复制高保真版本的项目，从项目的高保真版本生成项目的低保真版本，并且添加低保真版本的将项目提供给低保真复制平台。保真经理可以进一步将对低保真版本的项目的更改集成到相应的高保真版本的项目中。

17. 发明授权

US07401103B2 Replication protocol for data stores 有权
标题翻译：数据存储的复制协议
公开(公告)号：US07401103B2
公开(公告)日：2008-07-15
申请号：US10631212
申请日：2003-07-31
申请人： Lev Novik , Irena Hudis , Douglas B. Terry , Vivek J. Jhaveri , Sanjay Anand , Ashish B. Shah , Okechukwu Echeruo
发明人： Lev Novik , Irena Hudis , Douglas B. Terry , Vivek J. Jhaveri , Sanjay Anand , Ashish B. Shah , Okechukwu Echeruo
IPC分类号： G06F17/30
CPC分类号： G06F17/30581 , Y10S707/918 , Y10S707/99945 , Y10S707/99952 , Y10S707/99954
摘要： A protocol for replicating replicas in a sync community. Each replica maintains a knowledge that represents changes that the replica is aware of. Each replica does not typically maintain knowledge about other replicas. The protocol includes messages that include knowledge about changes on the various replicas. Using the knowledge, the replicas can enumerate changes and send the changes using asynchronous messages that do not need to be received in any particular order. The protocol enables filters to ensure that a valid replication is possible using a minimum knowledge argument. The protocol also enables replicas to partially replicate using filtered knowledge.
摘要翻译：用于在同步社区中复制副本的协议。每个副本都维护一个代表该副本所知的变化的知识。每个副本通常不会保留关于其他副本的知识。该协议包括包含有关各种副本上的更改的知识的消息。使用知识，副本可以枚举更改，并使用不需要以任何特定顺序接收的异步消息发送更改。该协议允许过滤器确保使用最小知识参数可以进行有效的复制。该协议还使复制品能够使用过滤的知识进行部分复制。

18. 发明授权

US4914586A Garbage collector for hypermedia systems 失效
标题翻译：超媒体系统的垃圾收集器
公开(公告)号：US4914586A
公开(公告)日：1990-04-03
申请号：US118493
申请日：1987-11-06
申请人： Daniel C. Swinehart , Douglas B. Terry
发明人： Daniel C. Swinehart , Douglas B. Terry
IPC分类号： G06F12/00 , G06F12/02 , G06F17/30
CPC分类号： G06F17/30117 , G06F17/30017 , Y10S379/902 , Y10S379/908 , Y10S707/99942 , Y10S707/99945 , Y10S707/99953
摘要： A database of interests is maintained in a distributed computing system to register the individual interests of users in centrally stored non-textual media files, such as digital voice, music, scanned-in image, and video files. Uniquely named piece table style persistent data structures are employed to give users controlled access to the underlying non-textual media files by embedded name reference to such piece tables in ordinary messages or text files, so a database of piece tables is also maintained. A garbage collector periodically enumerates the interest database to delete interest entries which have been invalidated. Aged piece tables are deleted from the reference database when there no longer are any recorded interests referring to them, and non-textual media files are deleted to reclaim the storage space allocated to them when there no longer are any piece tables referring to them.

19. 发明授权

US07685185B2 Move-in/move-out notification for partial replica synchronization 有权
标题翻译：部分复制同步的移入/移出通知
公开(公告)号：US07685185B2
公开(公告)日：2010-03-23
申请号：US11771153
申请日：2007-06-29
申请人： Venugopalan Saraswati Ramasubramanian , Thomas L. Rodeheffer , Douglas B. Terry , Edward P. Wobber
发明人： Venugopalan Saraswati Ramasubramanian , Thomas L. Rodeheffer , Douglas B. Terry , Edward P. Wobber
IPC分类号： G06F17/00
CPC分类号： G06F17/30575 , G06F17/30176
摘要： A system is disclosed for synchronizing partially-replicated collections using the concept of item-set knowledge and move-out notifications. Move-out notifications are provided to allow removal of changed items from replicas when the change in the item takes that item outside of the interest set of the replicas.
摘要翻译：公开了一种用于使用项目集知识和移出通知的概念同步部分复制集合的系统。提供移出通知，以便当项目的更改将该项目置于副本的兴趣集之外时，从副本中删除已更改的项目。

20. 发明申请

US20090006495A1 MOVE-IN/MOVE-OUT NOTIFICATION FOR PARTIAL REPLICA SYNCHRONIZATION 有权
标题翻译：部分替代同步的移入/移出通知
公开(公告)号：US20090006495A1
公开(公告)日：2009-01-01
申请号：US11771153
申请日：2007-06-29
申请人： Venugopalan Saraswati Ramasubramanian , Thomas L. Rodeheffer , Douglas B. Terry , Edward P. Wobber
发明人： Venugopalan Saraswati Ramasubramanian , Thomas L. Rodeheffer , Douglas B. Terry , Edward P. Wobber
IPC分类号： G06F17/30
CPC分类号： G06F17/30575 , G06F17/30176
摘要： A system is disclosed for synchronizing partially-replicated collections using the concept of item-set knowledge and move-out notifications. Move-out notifications are provided to allow removal of changed items from replicas when the change in the item takes that item outside of the interest set of the replicas.
摘要翻译：公开了一种用于使用项目集知识和移出通知的概念同步部分复制集合的系统。提供移出通知，以便当项目的更改将该项目置于副本的兴趣集之外时，从副本中删除已更改的项目。

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