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    • 16. 发明申请
    • Version Garbage Collection Using Snapshot Lists
    • 版本垃圾收集使用快照列表
    • US20140149353A1
    • 2014-05-29
    • US13750204
    • 2013-01-25
    • Juchang LeeChang Gyoo ParkYongjae ChuhJaeyun NohMichael Muehle
    • Juchang LeeChang Gyoo ParkYongjae ChuhJaeyun NohMichael Muehle
    • G06F17/30
    • G06F17/3015G06F17/3023G06F17/30353G06F17/30356
    • 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.
    • 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。
    • 17. 发明授权
    • Version garbage collection using snapshot lists
    • 使用快照列表的版本垃圾回收
    • US09098522B2
    • 2015-08-04
    • US13750204
    • 2013-01-25
    • Juchang LeeChang Gyoo ParkYongjae ChuhJaeyun NohMichael Muehle
    • Juchang LeeChang Gyoo ParkYongjae ChuhJaeyun NohMichael Muehle
    • G06F17/30
    • G06F17/3015G06F17/3023G06F17/30353G06F17/30356
    • 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.
    • 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。
    • 18. 发明授权
    • Distributed transaction management using optimization of local transactions
    • 使用优化本地交易的分布式事务管理
    • US09063969B2
    • 2015-06-23
    • US12980208
    • 2010-12-28
    • Juchang LeeMichael MuehleJaeyun Noh
    • Juchang LeeMichael MuehleJaeyun Noh
    • G06F9/46G06F17/00G06F17/30
    • G06F17/30377
    • A computer-implemented method, a computer program product, and a system are provided. A transaction master for each of a plurality of transactions of a database is provided. Each transaction master is configured to communicate with at least one transaction slave to manage execution a transaction in the plurality of transactions. A transaction token that specifies data to be visible for the transaction on the database is generated. The transaction token includes a transaction identifier for identifying whether the transaction is a committed transaction or an uncommitted transaction. The transaction master is configured to update the transaction token after execution of the transaction. A determination whether the transaction can be executed on the at least one transaction slave without accessing data specified by the transaction token is made. The transaction is executed on the at least one transaction slave using a transaction token stored at the at least one transaction slave.
    • 提供了计算机实现的方法,计算机程序产品和系统。 提供了数据库的多个事务中的每一个的事务主体。 每个事务主机被配置为与至少一个事务从属单元通信以管理多个事务中的事务的执行。 生成一个事务令牌,用于指定对数据库上的事务可见的数据。 交易令牌包括用于识别交易是承诺交易还是未提交交易的交易标识符。 事务主机被配置为在执行事务之后更新事务令牌。 确定是否可以在不访问由交易令牌指定的数据的情况下在至少一个事务从属方上执行事务。 使用存储在所述至少一个事务从属单元处的事务令牌在所述至少一个事务从属单元上执行事务。
    • 19. 发明申请
    • Distributed Transaction Management Using Optimization Of Local Transactions
    • 使用优化本地事务的分布式事务管理
    • US20120167098A1
    • 2012-06-28
    • US12980208
    • 2010-12-28
    • Juchang LeeMichael MuehleJaeyun Noh
    • Juchang LeeMichael MuehleJaeyun Noh
    • G06F9/46
    • G06F17/30377
    • A computer-implemented method, a computer program product, and a system are provided. A transaction master for each of a plurality of transactions of a database is provided. Each transaction master is configured to communicate with at least one transaction slave to manage execution a transaction in the plurality of transactions. A transaction token that specifies data to be visible for the transaction on the database is generated. The transaction token includes a transaction identifier for identifying whether the transaction is a committed transaction or an uncommitted transaction. The transaction master is configured to update the transaction token after execution of the transaction. A determination whether the transaction can be executed on the at least one transaction slave without accessing data specified by the transaction token is made. The transaction is executed on the at least one transaction slave using a transaction token stored at the at least one transaction slave.
    • 提供了计算机实现的方法,计算机程序产品和系统。 提供了数据库的多个事务中的每一个的事务主体。 每个事务主机被配置为与至少一个事务从属单元通信以管理多个事务中的事务的执行。 生成一个事务令牌,用于指定对数据库上的事务可见的数据。 交易令牌包括用于识别交易是承诺交易还是未提交交易的交易标识符。 事务主机被配置为在执行事务之后更新事务令牌。 确定是否可以在不访问由交易令牌指定的数据的情况下在至少一个事务从属方上执行事务。 使用存储在所述至少一个事务从属单元处的事务令牌在所述至少一个事务从属单元上执行事务。