公开(公告)号：US20140325116A1

公开(公告)日：2014-10-30

申请号：US13872530

申请日：2013-04-29

Applicant: Amazon Technologies, Inc.

Inventor： SAMUEL JAMES MCKELVIE ,  YAN VALERIE LESHINSKY ,  IAN P. NOWLAND ,  DARIN LEE FRINK ,  ANURAG WINDLASS GUPTA ,  ADAM DOUGLAS MORLEY ,  CHRISTOPHER NATHAN WATSON ,  MICHAEL DAVID MARR

IPC: G06F12/02

CPC classification number: G06F11/1469 ,  G06F3/0619 ,  G06F3/065 ,  G06F3/0688 ,  G06F11/14 ,  G06F11/1402 ,  G06F11/1441 ,  G06F11/1451 ,  G06F12/0246 ,  G06F2201/84

Abstract: Application program data stored in system memory may be selectively persisted. An indication may be provided to an application program that an application data object or a range of application data stored in system memory may be treated as persistent. Data backup may be enabled for the application data object or range of application data in the event of a system failure, copying the application data object or range of application data from system memory to non-volatile data storage. Upon recovery from a system failure, further data backup for the application data object or the range of application data may be disabled. In some embodiments, at least some of the application data object or range of application data may be recovered for the application program to access. Data backup for the application data object or the range of application data may also be re-enabled.

Abstract translation: 可以选择性地保持存储在系统存储器中的应用程序数据。 可以向应用程序提供可以将存储在系统存储器中的应用数据对象或应用数据的范围视为持久性的指示。 在系统故障的情况下，应用程序数据对象或应用程序数据范围可能启用数据备份，将应用程序数据对象或应用程序数据范围从系统内存复制到非易失性数据存储。 从系统故障恢复后，可能会禁用应用程序数据对象的进一步数据备份或应用程序数据范围。 在一些实施例中，可以为应用程序访问应用数据对象或应用数据范围中的至少一些。 还可以重新启用应用程序数据对象的数据备份或应用程序数据的范围。

公开(公告)号：US20140324785A1

公开(公告)日：2014-10-30

申请号：US13873467

申请日：2013-04-30

Applicant: Amazon Technologies, Inc.

Inventor： ANURAG WINDLASS GUPTA ,  PRADEEP JNANA MADHAVARAPU ,  SAMUEL JAMES MCKELVIE ,  YAN VALERIE LESHINSKY

IPC: G06F17/30

Abstract: A database system may receive a write request that specifies a modification to be made to a particular data record stored by the database system. A log record representing the modification to be made to the particular data record may be sent to a storage service of the database system. An indication (e.g., log record or other indication) that indicates a cached version of the particular data record stored in a read replica's cache is stale may be sent to a read replica. For a subsequent read of the particular data record received by the read replica, the read replica may request the particular data record from the storage service.

Abstract translation: 数据库系统可以接收指定对数据库系统存储的特定数据记录进行修改的写入请求。 表示对特定数据记录进行修改的日志记录可以被发送到数据库系统的存储服务。 指示存储在读取副本的高速缓存中的特定数据记录的缓存版本的指示（例如，日志记录或其他指示）可以被发送到读取副本。 为了对由读取的副本接收的特定数据记录的后续读取，读取的副本可以从存储服务请求特定的数据记录。

公开(公告)号：US20140279929A1

公开(公告)日：2014-09-18

申请号：US14201493

申请日：2014-03-07

Applicant: Amazon Technologies, Inc.

Inventor： ANURAG WINDLASS GUPTA ,  NEAL FACHAN ,  SAMUEL JAMES MCKELVIE ,  LAURION DARRELL BURCHALL ,  CHRISTOPHER RICHARD NEWCOMBE ,  PRADEEP JNANA MADHAVARAPU ,  BENJAMIN TOBLER ,  JAMES MCCLELLAN COREY

IPC: G06F11/14

CPC classification number: G06F17/30371 ,  G06F11/1451 ,  G06F11/1471 ,  G06F11/2094 ,  G06F17/30345 ,  G06F2201/80

Abstract: A database system may include a database service and a separate distributed storage service. The database service (or a database engine head node thereof) may be responsible for query parsing, optimization, and execution, transactionality, and consistency, while the storage service may be responsible for generating data pages from redo log records and for durability of those data pages. For example, in response to a write request directed to a particular data page, the database engine head node may generate a redo log record and send it, but not the data page, to a storage service node. The storage service node may store the redo log record and return a write acknowledgement to the database service prior to applying the redo log record. The server node may apply the redo log record and other redo log records to a previously stored version of the data page to create a current version.

Abstract translation: 数据库系统可以包括数据库服务和单独的分布式存储服务。 数据库服务（或其数据库引擎头节点）可以负责查询解析，优化和执行，事务性和一致性，而存储服务可能负责从重做日志记录生成数据页面以及对这些数据的耐久性 页面。 例如，响应于针对特定数据页的写请求，数据库引擎头节点可以生成重做日志记录，并将其发送到存储服务节点，而不是数据页。 存储服务节点可以存储重做日志记录，并在应用重做日志记录之前向数据库服务返回写入确认。 服务器节点可以将重做日志记录和其他重做日志记录应用于先前存储的数据页面版本，以创建当前版本。