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1. 发明授权

US09990392B2 Distributed transaction processing in MPP databases 有权
公开(公告)号：US09990392B2
公开(公告)日：2018-06-05
申请号：US14680675
申请日：2015-04-07
申请人： Jeffrey Pound , Nathan Auch , Peter Bumbulis , Anil Goel
发明人： Jeffrey Pound , Nathan Auch , Peter Bumbulis , Anil Goel
IPC分类号： G06F17/30
CPC分类号： G06F17/30377
摘要： Disclosed herein are system, method, and computer program product embodiments for distributed transaction processing in massively parallel processing (MPP) databases. An embodiment operates by receiving a transaction including a read timestamp corresponding to a version of data of a database associated with the query. It is determined whether a locally stored portion of the data of the database has a local timestamp that is equivalent to or after the read timestamp. A lock may be requested, and if received, the data is updated.

2. 发明授权

US09807168B2 Distributed shared log for modern storage servers 有权
公开(公告)号：US09807168B2
公开(公告)日：2017-10-31
申请号：US14684132
申请日：2015-04-10
申请人： Nathan Auch , Peter Bumbulis , Anil Goel , Jeffrey Pound
发明人： Nathan Auch , Peter Bumbulis , Anil Goel , Jeffrey Pound
IPC分类号： G06F15/16 , H04L29/08 , G06F15/167
CPC分类号： H04L67/1097 , G06F15/167
摘要： Disclosed herein are system, method, and computer program product embodiments for accessing a distributed shared log that supports a total order over log writes and multiple logical log streams. An embodiment operates by selecting a range of log entries for a logical log stream from the distributed shared log and mapping the selected range of log entries to associated storage units in a plurality of storage units. The selected range of log entries are stored at the associated storage units according to metadata that indexes the selected range of log entries by logical log stream. The selected range of log entries are then requested from the associated storage units based on the mapping. The selected range of log entries for the logical log stream are then returned from the associated storage units based on a scan of the metadata. The received log entries are then reassembled.

3. 发明申请

US20160301753A1 Distributed Shared Log For Modern Storage Servers 有权
标题翻译：现代存储服务器的分布式共享日志
公开(公告)号：US20160301753A1
公开(公告)日：2016-10-13
申请号：US14684132
申请日：2015-04-10
申请人： Nathan Auch , Peter Bumbulis , Anil Goel , Jeffrey Pound
发明人： Nathan Auch , Peter Bumbulis , Anil Goel , Jeffrey Pound
IPC分类号： H04L29/08 , G06F15/167
CPC分类号： H04L67/1097 , G06F15/167
摘要： Disclosed herein are system, method, and computer program product embodiments for accessing a distributed shared log that supports a total order over log writes and multiple logical log streams. An embodiment operates by selecting a range of log entries for a logical log stream from the distributed shared log and mapping the selected range of log entries to associated storage units in a plurality of storage units. The selected range of log entries are stored at the associated storage units according to metadata that indexes the selected range of log entries by logical log stream. The selected range of log entries are then requested from the associated storage units based on the mapping. The selected range of log entries for the logical log stream are then returned from the associated storage units based on a scan of the metadata. The received log entries are then reassembled.
摘要翻译：这里公开了用于访问分布式共享日志的系统，方法和计算机程序产品实施例，其支持在日志写入和多个逻辑日志流上的总顺序。实施例通过从分布式共享日志中选择用于逻辑日志流的日志条目的范围来操作，并将所选择的日志条目范围映射到多个存储单元中的相关联的存储单元。所选择的日志条目的范围根据通过逻辑日志流对所选择的日志条目范围进行索引的元数据存储在相关联的存储单元处。然后基于映射从相关联的存储单元请求所选择的日志条目的范围。然后，基于元数据的扫描，从相关联的存储单元返回逻辑日志流的所选择的日志条目范围。接收的日志条目然后重新组合。

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