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1. 发明授权

US10579610B2 Replicated database startup for common database storage 有权
公开(公告)号：US10579610B2
公开(公告)日：2020-03-03
申请号：US15478162
申请日：2017-04-03
申请人： Amazon Technologies, Inc.
发明人： Tengiz Kharatishvili , Hyungsoo Jung , Andrew Scott Richardson , Alexandre Olegovich Verbitski
IPC分类号： G06F17/30 , G06F16/23 , G06F16/27
摘要： Read-only nodes of a distributed database system may perform replicated database startup for common database storage. A read-only node may request a view of a database from a master node to initialize the read-only node for servicing queries. An indication of the view may be received and portions of data maintained for the distributed database may be read from a common data store maintaining the data for the database according to the indicated view of the database. In-memory data structures at the read-only node for servicing queries may be initialized based on the portions of data read from the common data store. The read-only node may then be made available for servicing queries.

2. 发明授权

US11061903B1 Methods and systems for an improved database 有权
公开(公告)号：US11061903B1
公开(公告)日：2021-07-13
申请号：US15280613
申请日：2016-09-29
申请人： Amazon Technologies, Inc.
发明人： Niket Goel , Tengiz Kharatishvili , Alexandre Olegovich Verbitski , Stefano Stefani , Alok Nikhil , Saileshwar Krishnamurthy , Kamal Kant Gupta
IPC分类号： G06F16/2455 , G06F3/06 , G06F16/22
摘要： Systems, methods, and computer-readable media are disclosed for an improved database. The systems, methods, and computer-readable media described herein may enhance the response time of databases and improve user experiences. In an example method described herein, a database may receive a search request for data stored in the database. The database may be stored in association with a b-tree to facilitate searching and retrieving data from the database. The method may include allocating a portion of a first memory for read ahead operations and performing the read ahead operations, wherein the read ahead operations comprise loading, into the portion of the first memory, data associated with one or more siblings of a current node, wherein the one or more siblings of the current node are one or more nodes that have a same number of parent nodes as the current node.

3. 发明授权

US10909091B1 On-demand data schema modifications 有权
公开(公告)号：US10909091B1
公开(公告)日：2021-02-02
申请号：US15360787
申请日：2016-11-23
申请人： Amazon Technologies, Inc.
发明人： Aakash Shah , Kamal Kant Gupta , Alexandre Olegovich Verbitski , Sailesh Krishnamurthy , Hyungsoo Jung , Anurag Windlass Gupta , Zhaohui Zhang , Tengiz Kharatishvili , Stefano Stefani
IPC分类号： G06F16/21 , G06F16/23 , G06F16/22
摘要： A data store may implement on-demand data schema modifications. Request to change a schema for a data set in a data store may be received and a description of the change recorded as part of a schema history for the data set. The request to change the schema may then be acknowledged. When access requests directed to the data set are received at the data store, the schema history for the data set may be evaluated. If the schema history indicates that data that is to be accessed in order to service the data store needs to include one or more changes in the schema history, then a version of the schema that includes the one or more changes may be applied to the data.

4. 发明授权

US09842031B1 Incremental updates to user transaction state at read-only nodes of a distributed database 有权
公开(公告)号：US09842031B1
公开(公告)日：2017-12-12
申请号：US14563756
申请日：2014-12-08
申请人： Amazon Technologies, Inc.
发明人： Tengiz Kharatishvili
IPC分类号： G06F17/30 , G06F11/14
CPC分类号： G06F11/1474 , G06F17/30575
摘要： A distributed database system may implement incremental updates to user transaction state at read-only nodes of the distributed database. A read-write node of the distributed database may determine a change to transaction state for a user transaction initiated at the read-write node. The read-write node may send a notification of the change to the transaction state for the user transaction to a read-only node in order to incrementally update the transaction state for the user transaction at the read-only node. The read-only node may receive the notification of the change to the transaction state and update in-memory system metadata to apply the change to the transaction state for the user transaction. A view of the distributed database may be made available at the read-only node for read requests according to the updated transaction state for the user transaction.

5. 发明授权

US11080262B1 Optimistic atomic multi-page write operations in decoupled multi-writer databases 有权
公开(公告)号：US11080262B1
公开(公告)日：2021-08-03
申请号：US16586497
申请日：2019-09-27
申请人： Amazon Technologies, Inc.
发明人： Justin Levandoski , Niket Goel , Tengiz Kharatishvili , Alexandre Olegovich Verbitski , Kamal Kant Gupta , Xiaofeng Bao
IPC分类号： G06F16/23 , G06F16/22 , G06F16/2455
摘要： Systems and methods are disclosed to implement, in a database system, database engine nodes that implement multi-page writes as an atomic operation. In embodiments, the database system may include multiple database engine nodes that optimistically perform page writes locally without checking for potential conflicts at a shared storage system. The storage system will detect and report conflicting writes on a single page. To ensure that a group of writes to multiple pages occur atomically, the database engine node maintains a transaction context for the group, so that if a page conflict is later detected for any write in the group, the entire group will be rolled back at the database engine node and the storage system. In embodiments, the transaction context will track subsequent writes generated by the node to any page written by the group, so that these subsequent writes are also rolled back with the group.

6. 发明授权

US09946735B2 Index structure navigation using page versions for read-only nodes 有权
公开(公告)号：US09946735B2
公开(公告)日：2018-04-17
申请号：US15376386
申请日：2016-12-12
申请人： Amazon Technologies, Inc.
发明人： Tengiz Kharatishvili , Pradeep Jnana Madhavarapu , Anurag Windlass Gupta
IPC分类号： G06F17/30
CPC分类号： G06F17/30283 , G06F17/30312 , G06F17/30321 , G06F17/30356 , G06F17/30368 , G06F17/30575 , G06F17/30578 , G06F17/30619 , G06F17/30631
摘要： Read-only nodes of a distributed database system may implement index structure navigation using page versions. A read request may be received at a read only node of a distributed database for select data. Data pages linked together to form an index structure for data stored for the distributed database may be navigated according to versions maintained for the data pages in order to identify one or more locations to access for the select data. One or more prior versions of data pages may be selected as part navigating the index structure according to a consistent view of the distributed database associated with the read request. Change notifications may also be received at the read-only node modifying the data pages of the index structure. The index structure modifications may be applied without blocking the index structure navigation for servicing the read request.

7. 发明授权

US09613120B1 Replicated database startup for common database storage 有权
公开(公告)号：US09613120B1
公开(公告)日：2017-04-04
申请号：US14538752
申请日：2014-11-11
申请人： Amazon Technologies, Inc.
发明人： Tengiz Kharatishvili , Hyungsoo Jung , Andrew Scott Richardson , Alexandre Olegovich Verbitski
IPC分类号： G06F17/30
CPC分类号： G06F17/30368 , G06F17/30283 , G06F17/30345 , G06F17/30575
摘要： Read-only nodes of a distributed database system may perform replicated database startup for common database storage. A read-only node may request a view of a database from a master node to initialize the read-only node for servicing queries. An indication of the view may be received and portions of data maintained for the distributed database may be read from a common data store maintaining the data for the database according to the indicated view of the database. In-memory data structures at the read-only node for servicing queries may be initialized based on the portions of data read from the common data store. The read-only node may then be made available for servicing queries.

8. 发明申请

US20170091226A1 INDEX STRUCTURE NAVIGATION USING PAGE VERSIONS FOR READ-ONLY NODES 审中-公开
公开(公告)号：US20170091226A1
公开(公告)日：2017-03-30
申请号：US15376386
申请日：2016-12-12
申请人： Amazon Technologies, Inc.
发明人： Tengiz Kharatishvili , Pradeep Jnana Madhavarapu , Anurag Windlass Gupta
IPC分类号： G06F17/30
CPC分类号： G06F17/30283 , G06F17/30312 , G06F17/30321 , G06F17/30356 , G06F17/30368 , G06F17/30575 , G06F17/30578 , G06F17/30619 , G06F17/30631
摘要： Read-only nodes of a distributed database system may implement index structure navigation using page versions. A read request may be received at a read only node of a distributed database for select data. Data pages linked together to form an index structure for data stored for the distributed database may be navigated according to versions maintained for the data pages in order to identify one or more locations to access for the select data. One or more prior versions of data pages may be selected as part navigating the index structure according to a consistent view of the distributed database associated with the read request. Change notifications may also be received at the read-only node modifying the data pages of the index structure. The index structure modifications may be applied without blocking the index structure navigation for servicing the read request.

9. 发明授权

US09280591B1 Efficient replication of system transactions for read-only nodes of a distributed database 有权
标题翻译：对分布式数据库的只读节点进行系统事务的高效复制
公开(公告)号：US09280591B1
公开(公告)日：2016-03-08
申请号：US14033343
申请日：2013-09-20
申请人： Amazon Technologies, Inc.
发明人： Tengiz Kharatishvili , Pradeep Jnana Madhavarapu , Anurag Windlass Gupta
IPC分类号： G06F7/00 , G06F17/00 , G06F17/30
CPC分类号： G06F17/30575
摘要： A distributed database system may efficiently replicate system transactions one or more read-only nodes. An update to a distributed database may be received. One or more system transactions may be performed to apply the update. For each system transaction, one or more change notifications may be generated which indicate changes to be applied in order to perform the system transaction. A particular one of the change notifications may be identified as the last change to be applied in order to complete the system transaction. The change notifications may be sent to one or more read-only nodes. The read-only nodes may process read requests for the distributed database system. The identified change notification may indicate to the read-only nodes the last change to be applied prior to presenting a state of the database that includes the system transaction when servicing read requests.
摘要翻译：分布式数据库系统可以有效地复制系统事务一个或多个只读节点。可以接收对分布式数据库的更新。可以执行一个或多个系统事务来应用该更新。对于每个系统事务，可以生成一个或多个改变通知，其指示为了执行系统事务而应用的更改。可以将特定的一个改变通知识别为要用于完成系统事务的最后一次更改。更改通知可以被发送到一个或多个只读节点。只读节点可以处理分布式数据库系统的读取请求。所识别的改变通知可以在对只读节点指示在服务读请求时呈现包括系统事务的数据库的状态之前要应用的最后变化。

10. 发明申请

US20220358106A1 PROXY-BASED DATABASE SCALING 有权
公开(公告)号：US20220358106A1
公开(公告)日：2022-11-10
申请号：US17814463
申请日：2022-07-22
申请人： Amazon Technologies, Inc.
发明人： Saileshwar Krishnamurthy , Alexey Kuznetsov , Mushahid Alam , Anurag Windlass Gupta , Kamal Kant Gupta , Tengiz Kharatishvili , Bohan Liu , Sandor Loren Maurice , Alok Nandan Nikhil , Nicholas Piers O'Shea , Debanjan Saha , Yoni Shalom , Jagdeep Singh Sidhu , Hongbo Song , Alexandre Olegovich Verbitski , Lawrence Douglas Webley , Siyuan Xing , Yuhui Yuan , Yibo Zhu
IPC分类号： G06F16/21 , G06F16/27 , H04L67/56
摘要： Proxy-based scaling may be performed for databases. A proxy may be implemented for a database that can establish a connection between the proxy and a database engine to perform a database queries received from a client at the proxy. A scaling event may be detected for the database responsive to which the proxy may establish a connection with a new database engine which may, in some embodiments, have different capabilities or resources that address the features or criteria that triggered the scaling event. Session state may be copied from the database engine to the new database engine so that the new database engine may be able to provide access to the database on behalf of requests received from the client through the proxy.

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