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    • 4. 发明授权
    • Method and apparatus for ensuring cache coherency for spawned dependent transactions in a multi-system environment with shared data storage devices
    • 用于确保在具有共享数据存储设备的多系统环境中的产生的依赖事务的高速缓存一致性的方法和装置
    • US06557082B1
    • 2003-04-29
    • US09539664
    • 2000-03-30
    • Jeffrey William JostenJames Zu-Chia Teng
    • Jeffrey William JostenJames Zu-Chia Teng
    • G06F1300
    • G06F12/0815G06F12/0866Y10S707/99952
    • A method, apparatus and article of manufacture for ensuring cache coherency in a database containing a data store on a central data storage device connected to a plurality of computers. When an immediate write option is set, the data in a local buffer pool changed by a first transaction on a first computer is immediately written to a group buffer pool at the central data storage device, prior to initiating a second transaction upon a second computer that relies upon the modified data. Local buffer pools are then invalidated thereby facilitating local buffer pool updates from the group buffer pool. The immediate write (IW) option may be a subsystem parameter set at a system level or a bind option set at a plan level. The immediate write option may be set so that data is written to the group buffer pool at or before a phase one commit.
    • 一种用于确保数据库中的高速缓存一致性的方法,装置和制品,所述数据库包含连接到多个计算机的中央数据存储设备上的数据存储。 当设置立即写入选项时,在第一计算机上由第一事务改变的本地缓冲池中的数据被立即写入中央数据存储设备的组缓冲池,然后在第二计算机上发起第二事务之前, 依赖于修改后的数据。 然后本地缓冲池无效,从而有助于从组缓冲池更新本地缓冲池。 即时写入(IW)选项可以是在系统级别设置的子系统参数或在计划级别设置的绑定选项。 可以设置即时写入选项,以便在第一阶段提交之前或之前将数据写入组缓冲池。
    • 7. 发明授权
    • High performance support for XA protocols in a clustered shared database
    • 在群集共享数据库中对XA协议的高性能支持
    • US07743036B2
    • 2010-06-22
    • US11764962
    • 2007-06-19
    • Curt Lee CotnerBrian K. HowellJeffrey William JostenJames Willis Pickel
    • Curt Lee CotnerBrian K. HowellJeffrey William JostenJames Willis Pickel
    • G06F17/30
    • G06F17/30371Y10S707/99953
    • A shared memory device called the Coupling Facility (CF) is used to record the indoubt transaction entries for each member of the database cluster, avoiding the CPU cost and elapsed time impact of persisting this information to disk (either via a log write or a relational table I/O). The CF provides full read/write access and data coherency for concurrent access by all the members in the database cluster. At any given point in time, the CF will contain the full list of indoubt transactions for the entire database cluster. CF duplexing is used to guarantee the integrity of the CF structure used for the indoubt list. In the event of complete loss of both CF structures (which will not happen except in major disaster situations), data sharing group restart processing can reconstruct the CF structures from the individual member logs.
    • 称为耦合设施(CF)的共享内存设备用于记录数据库集群中每个成员的不确定事务条目,从而避免将此信息持续存储在磁盘上的CPU成本和耗时时间(通过日志写入或关系 表I / O)。 CF为数据库集群中的所有成员提供完全读/写访问和数据一致性并发访问。 在任何给定的时间点,CF将包含整个数据库集群的不确定事务的完整列表。 CF双工用于确保用于不确定列表的CF结构的完整性。 在CF结构完全丢失的情况下(除主要灾害情况外不会发生),数据共享组重新启动处理可以从各个成员日志中重构CF结构。
    • 8. 发明授权
    • System and method for increasing availability of an index
    • 提高索引可用性的系统和方法
    • US07650352B2
    • 2010-01-19
    • US11277355
    • 2006-03-23
    • You-Chin FuhSauraj GoswamiJeffrey William JostenJames Zu-Chia Teng
    • You-Chin FuhSauraj GoswamiJeffrey William JostenJames Zu-Chia Teng
    • G06F7/00G06F17/30
    • G06F17/30371G06F17/30336G06F17/30368
    • A partial index availability system places, in a restricted state, all pages in the index associated with a structure modification, when an error occurs in processing a log of the said structure modification. This maintains traversability of the rest of the index that is not in restricted state. The system locates and marks a left sentinel and a right sentinel associated with a non-leaf page that is in a restricted state preventing an undo of a transaction. The sentinels prevent a transaction from accessing an uncommitted change associated with the non-leaf page. After a recovery procedure is run the entire index is made available. During the period between the placement of the index pages in LPL or rebuild pending to the time of final removal of these pages from their restrictive states as a result of a recovery procedure being run, the users are given access to the non-restricted portion of the index.
    • 当处理所述结构修改的日志时,部分索引可用性系统将处于受限状态的所有索引中的与结构修改相关联的所有页面放置。 这样可以保持索引的其余部分的遍历不受限制。 系统定位并标记与处于限制状态的非叶页面相关联的左前哨和右哨兵,以防止撤消交易。 哨兵防止事务访问与非叶页面相关联的未提交的更改。 运行恢复过程后,整个索引可用。 在LPL中的索引页面的放置期间或由于正在运行恢复过程而将这些页面从其限制性状态最终移除到最终删除的时间期间,用户被访问到非限制部分 指数。
    • 9. 发明授权
    • High performance support for XA protocols in a clustered shared database
    • 在群集共享数据库中对XA协议的高性能支持
    • US07260589B2
    • 2007-08-21
    • US10726700
    • 2003-12-04
    • Curt Lee CotnerBrian K. HowellJeffrey William JostenJames Willis Pickel
    • Curt Lee CotnerBrian K. HowellJeffrey William JostenJames Willis Pickel
    • G06F17/30
    • G06F17/30371Y10S707/99953
    • A shared memory device called the Coupling Facility (CF) is used to record the indoubt transaction entries for each member of the database cluster, avoiding the CPU cost and elapsed time impact of persisting this information to disk (either via a log write or a relational table I/O). The CF provides full read/write access and data coherency for concurrent access by all the members in the database cluster. At any given point in time, the CF will contain the full list of indoubt transactions for the entire database cluster. CF duplexing is used to guarantee the integrity of the CF structure used for the indoubt list. In the event of complete loss of both CF structures (which will not happen except in major disaster situations), data sharing group restart processing can reconstruct the CF structures from the individual member logs.
    • 称为耦合设施(CF)的共享内存设备用于记录数据库集群中每个成员的不确定事务条目,从而避免将此信息持续存储在磁盘上的CPU成本和耗时时间(通过日志写入或关系 表I / O)。 CF为数据库集群中的所有成员提供完全读/写访问和数据一致性并发访问。 在任何给定的时间点,CF将包含整个数据库集群的不确定事务的完整列表。 CF双工用于确保用于不确定列表的CF结构的完整性。 在CF结构完全丢失的情况下(除主要灾害情况外不会发生),数据共享组重新启动处理可以从各个成员日志中重构CF结构。