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1. 发明申请

US20140149353A1 Version Garbage Collection Using Snapshot Lists 有权
标题翻译：版本垃圾收集使用快照列表
公开(公告)号：US20140149353A1
公开(公告)日：2014-05-29
申请号：US13750204
申请日：2013-01-25
申请人： Juchang Lee , Chang Gyoo Park , Yongjae Chuh , Jaeyun Noh , Michael Muehle
发明人： Juchang Lee , Chang Gyoo Park , Yongjae Chuh , Jaeyun Noh , Michael Muehle
IPC分类号： G06F17/30
CPC分类号： G06F17/3015 , G06F17/3023 , G06F17/30353 , G06F17/30356
摘要： Systems, methods and computer program product embodiments for providing version garbage collection using snapshot lists are disclosed herein. Version garbage collection using snapshot lists includes storing, by at least one processor, versions of a record in a database table, the record comprising a record value and a version timestamp, storing, by the at least one processor, active snapshots in two levels of active snapshot lists, an active snapshot comprising a transaction identifier and a snapshot timestamp, determining, by the at least one processor, a minimum active snapshot from the active snapshots in the two levels of active snapshot lists and deleting, by the at least one processor, versions of the record having a version timestamp earlier than a snapshot timestamp of the minimum active snapshot.
摘要翻译：本文公开了使用快照列表提供版本垃圾收集的系统，方法和计算机程序产品实施例。使用快照列表的版本垃圾收集包括通过至少一个处理器存储数据库表中的记录的版本，所述记录包括记录值和版本时间戳，由所述至少一个处理器存储两个级别的活动快照活动快照列表，包括事务标识符和快照时间戳的活动快照，由所述至少一个处理器确定所述两个活动快照列表中的活动快照中的最小主动快照，并且由所述至少一个处理器，该记录的版本的版本时间戳早于最小主动快照的快照时间戳。

2. 发明授权

US09098522B2 Version garbage collection using snapshot lists 有权
标题翻译：使用快照列表的版本垃圾回收
公开(公告)号：US09098522B2
公开(公告)日：2015-08-04
申请号：US13750204
申请日：2013-01-25
申请人： Juchang Lee , Chang Gyoo Park , Yongjae Chuh , Jaeyun Noh , Michael Muehle
发明人： Juchang Lee , Chang Gyoo Park , Yongjae Chuh , Jaeyun Noh , Michael Muehle
IPC分类号： G06F17/30
CPC分类号： G06F17/3015 , G06F17/3023 , G06F17/30353 , G06F17/30356
摘要： Systems, methods and computer program product embodiments for providing version garbage collection using snapshot lists are disclosed herein. Version garbage collection using snapshot lists includes storing, by at least one processor, versions of a record in a database table, the record comprising a record value and a version timestamp, storing, by the at least one processor, active snapshots in two levels of active snapshot lists, an active snapshot comprising a transaction identifier and a snapshot timestamp, determining, by the at least one processor, a minimum active snapshot from the active snapshots in the two levels of active snapshot lists and deleting, by the at least one processor, versions of the record having a version timestamp earlier than a snapshot timestamp of the minimum active snapshot.
摘要翻译：本文公开了使用快照列表提供版本垃圾收集的系统，方法和计算机程序产品实施例。使用快照列表的版本垃圾收集包括通过至少一个处理器存储数据库表中的记录的版本，所述记录包括记录值和版本时间戳，由所述至少一个处理器存储两个级别的活动快照活动快照列表，包括事务标识符和快照时间戳的活动快照，由所述至少一个处理器确定所述两个活动快照列表中的活动快照中的最小主动快照，并且由所述至少一个处理器，该记录的版本的版本时间戳早于最小主动快照的快照时间戳。

3. 发明申请

US20140156619A1 Locking Protocol for Partitioned and Distributed Tables 有权
标题翻译：分区和分布式表的锁定协议
公开(公告)号：US20140156619A1
公开(公告)日：2014-06-05
申请号：US13750194
申请日：2013-01-25
申请人： Juchang LEE , Jin Yeon Lee , Yongjae Chuh , Jaeyun Noh
发明人： Juchang LEE , Jin Yeon Lee , Yongjae Chuh , Jaeyun Noh
IPC分类号： G06F17/30
CPC分类号： G06F17/30289 , G06F17/30008 , G06F17/30362
摘要： Systems, methods and computer program product embodiments for providing a locking protocol for partitioned and distributed database tables are disclosed herein. A locking method includes executing, by at least one processor, a first database transaction on a second node, attempting to acquire and acquiring a lock on the second node in intentional exclusive mode, executing, by the at least one processor, a second database transaction on a first node, acquiring a lock on the first node in exclusive mode and waiting to acquire a lock on the second node in exclusive mode, routing, by the at least one processor, the first database transaction to the first node and unsuccessfully trying to acquire a lock on the first node and committing, by the at least one processor, the first database transaction.
摘要翻译：本文公开了用于为分区和分布式数据库表提供锁定协议的系统，方法和计算机程序产品实施例。锁定方法包括由至少一个处理器执行第二节点上的第一数据库事务，尝试以有意的排他模式获取和获取第二节点上的锁定，由至少一个处理器执行第二数据库事务在第一节点上，以独占模式获取第一节点上的锁定，并且以排他模式等待获取第二节点上的锁定，由至少一个处理器将第一数据库事务路由到第一节点，并且不成功地尝试获得第一节点上的锁并由至少一个处理器提交第一数据库事务。

4. 发明授权

US09501502B2 Locking protocol for partitioned and distributed tables 有权
标题翻译：分区表和分布式表的锁定协议
公开(公告)号：US09501502B2
公开(公告)日：2016-11-22
申请号：US13750194
申请日：2013-01-25
申请人： Juchang Lee , Jin Yeon Lee , Yongjae Chuh , Jaeyun Noh
发明人： Juchang Lee , Jin Yeon Lee , Yongjae Chuh , Jaeyun Noh
IPC分类号： G06F17/30
CPC分类号： G06F17/30289 , G06F17/30008 , G06F17/30362
摘要： Systems, methods and computer program product embodiments for providing a locking protocol for partitioned and distributed database tables are disclosed herein. A locking method includes executing, by at least one processor, a first database transaction on a second node, attempting to acquire and acquiring a lock on the second node in intentional exclusive mode, executing, by the at least one processor, a second database transaction on a first node, acquiring a lock on the first node in exclusive mode and waiting to acquire a lock on the second node in exclusive mode, routing, by the at least one processor, the first database transaction to the first node and unsuccessfully trying to acquire a lock on the first node and committing, by the at least one processor, the first database transaction.
摘要翻译：本文公开了用于为分区和分布式数据库表提供锁定协议的系统，方法和计算机程序产品实施例。锁定方法包括由至少一个处理器执行第二节点上的第一数据库事务，尝试以有意的排他模式获取和获取第二节点上的锁定，由至少一个处理器执行第二数据库事务在第一节点上，以独占模式获取第一节点上的锁定，并且以排他模式等待获取第二节点上的锁定，由至少一个处理器将第一数据库事务路由到第一节点，并且不成功地尝试获得第一节点上的锁并由至少一个处理器提交第一数据库事务。

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