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1. 发明授权

US06609136B2 Recovering data from a failed cache using a surviving cache 有权
标题翻译：使用幸存缓存从故障缓存中恢复数据
公开(公告)号：US06609136B2
公开(公告)日：2003-08-19
申请号：US09894757
申请日：2001-06-27
申请人： Roger J. Bamford , Boris Klots
发明人： Roger J. Bamford , Boris Klots
IPC分类号： G06F1730
CPC分类号： G06F11/1471 , G06F2201/80 , Y10S707/915 , Y10S707/99938 , Y10S707/99952 , Y10S707/99953 , Y10S707/99954
摘要： A method and apparatus are provided for transferring a resource from the cache of one database server to the cache of another database server without first writing the resource to disk. When a database server (Requestor) desires to modify a resource, the Requestor asks for the current version of the resource. The database server that has the current version (Holder) directly ships the current version to the Requestor. Upon shipping the version, the Holder loses permission to modify the resource, but continues to retain the resource in memory. When the retained version of the resource, or a later version thereof, is written to disk, the Holder can discard the retained version of the resource. Otherwise, the Holder does not discard the retained version. Using this technique, single-server failures are recovered without having to merge the recovery logs of the various database servers that had access to the resource.
摘要翻译：提供了一种方法和装置，用于将资源从一个数据库服务器的高速缓存传送到另一个数据库服务器的高速缓存，而无需首先将资源写入磁盘。当数据库服务器（请求者）希望修改资源时，请求者要求资源的当前版本。具有当前版本（Holder）的数据库服务器将当前版本直接发送到请求者。运送版本后，持有人将失去修改资源的权限，但继续将资源保留在内存中。当资源的保留版本或其更新版本写入磁盘时，持有者可以丢弃资源的保留版本。否则，持有人不会丢弃保留的版本。使用此技术，恢复单服务器故障，而无需合并可访问资源的各种数据库服务器的恢复日志。

2. 发明授权

US5963960A Method and apparatus for queuing updates in a computer system 失效
标题翻译：在计算机系统中排队更新的方法和装置
公开(公告)号：US5963960A
公开(公告)日：1999-10-05
申请号：US739353
申请日：1996-10-29
申请人： Garret F. Swart , Roger J. Bamford , Boris Klots
发明人： Garret F. Swart , Roger J. Bamford , Boris Klots
IPC分类号： G06F17/30 , G11C7/22 , G11C11/4076 , G06F15/40
CPC分类号： G06F17/30949 , G11C11/4076 , G11C7/22 , Y10S707/99953
摘要： A method for updating and reading data stored in a static memory in a computer system is disclosed. An update queue stores one or more update records in dynamic memory that specify changes made by a transaction to data stored in the static memory. If a transaction requests data for which the transaction has previously generated an update record updated data is generated in dynamic memory, where the updated data reflecting the changes specified by the update records. The updated data is then supplied to the transaction.
摘要翻译：公开了一种用于更新和读取存储在计算机系统中的静态存储器中的数据的方法。更新队列将一个或多个更新记录存储在动态存储器中，该更新记录指定事务对存储在静态存储器中的数据所做的更改。如果事务请求事务先前已生成更新记录的数据，则在动态内存中生成更新数据，其中更新的数据反映更新记录指定的更改。然后将更新的数据提供给事务。

3. 发明授权

US5832521A Method and apparatus for performing consistent reads in multiple-server environments 失效
标题翻译：在多服务器环境中执行一致读取的方法和装置
公开(公告)号：US5832521A
公开(公告)日：1998-11-03
申请号：US808622
申请日：1997-02-28
申请人： Boris Klots , Roger J. Bamford
发明人： Boris Klots , Roger J. Bamford
IPC分类号： G06F17/30
CPC分类号： G06F17/30575 , Y10S707/99934 , Y10S707/99953 , Y10S707/99954
摘要： A method and apparatus for supplying a particular version of a data item to a transaction executing in a first database server is provided. The data item is in a database accessible by the first database server and one or more other database servers. The method involves determining whether a current version of the data item resides in a cache that is remote relative to the first database server. If the current version of the data item does not reside in a cache that is remote relative to the first database server, then a first derivation mechanism that is local to the first database server to derives the particular version of the data item from the current version of the data item. If the current version of the data item resides in a cache that is remote relative to the first database server, then a second derivation mechanism that is local to the cache derives the particular version of the data item from the current version of the data item. Once built, the particular version of the data item sent to the first database server. Determining whether a current version of the data item resides in a cache that is remote relative to the first database server may be performed by determining whether a process currently holds a write lock on the data item, and if a process currently holds a write lock on the data item, then determining whether the process is remote relative to the first database server.
摘要翻译：提供了一种用于将数据项的特定版本提供给在第一数据库服务器中执行的事务的方法和装置。数据项目位于第一数据库服务器和一个或多个其他数据库服务器可访问的数据库中。该方法涉及确定数据项的当前版本是否驻留在相对于第一数据库服务器是远程的高速缓存中。如果数据项的当前版本不驻留在相对于第一数据库服务器的远程缓存中，则第一个导出机制是第一个数据库服务器的本机，以从当前版本中导出数据项的特定版本的数据项。如果数据项的当前版本驻留在相对于第一数据库服务器的远程缓存中，则缓存本地的第二推导机制从数据项的当前版本导出数据项的特定版本。一旦构建，数据项的特定版本发送到第一个数据库服务器。确定数据项的当前版本是否驻留在相对于第一数据库服务器是远程的高速缓存中可以通过确定进程当前是否对数据项保持写锁定，以及当前进程是否持有写锁定数据项，然后确定进程是否相对于第一数据库服务器是远程的。

4. 发明授权

US06353836B1 Method and apparatus for transferring data from the cache of one node to the cache of another node 有权
标题翻译：用于将数据从一个节点的高速缓存传送到另一个节点的高速缓存的方法和装置
公开(公告)号：US06353836B1
公开(公告)日：2002-03-05
申请号：US09199120
申请日：1998-11-24
申请人： Roger J. Bamford , Boris Klots
发明人： Roger J. Bamford , Boris Klots
IPC分类号： G06F1730
CPC分类号： G06F11/1471 , G06F2201/80 , Y10S707/915 , Y10S707/99938 , Y10S707/99952 , Y10S707/99953 , Y10S707/99954
摘要： A method and apparatus are provided for transferring a resource from the cache of one database server to the cache of another database server without first writing the resource to disk. When a database server (Requestor) desires to modify a resource, the Requestor asks for the current version of the resource. The database server that has the current version (Holder) directly ships the current version to the Requestor. Upon shipping the version, the Holder loses permission to modify the resource, but continues to retain the resource in memory. When the retained version of the resource, or a later version thereof, is written to disk, the Holder can discard the retained version of the resource. Otherwise, the Holder does not discard the retained version. Using this technique, single-server failures are recovered without having to merge the recovery logs of the various database servers that had access to the resource.
摘要翻译：提供了一种方法和装置，用于将资源从一个数据库服务器的高速缓存传送到另一个数据库服务器的高速缓存，而无需首先将资源写入磁盘。当数据库服务器（请求者）希望修改资源时，请求者要求资源的当前版本。具有当前版本（Holder）的数据库服务器将当前版本直接发送到请求者。运送版本后，持有人将失去修改资源的权限，但继续将资源保留在内存中。当将资源的保留版本或其更新版本写入磁盘时，持有者可以丢弃资源的保留版本。否则，持有人不会丢弃保留的版本。使用此技术，恢复单服务器故障，而无需合并可访问资源的各种数据库服务器的恢复日志。

5. 发明授权

US06237001B1 Managing access to data in a distributed database environment 失效
标题翻译：管理分布式数据库环境中的数据访问
公开(公告)号：US06237001B1
公开(公告)日：2001-05-22
申请号：US09095463
申请日：1998-06-10
申请人： Roger J. Bamford , Boris Klots
发明人： Roger J. Bamford , Boris Klots
IPC分类号： G06F1500
CPC分类号： G06F9/466 , G06F17/30356 , G06F17/30575 , Y10S707/99933 , Y10S707/99938 , Y10S707/99953
摘要： A method and an apparatus for managing access to data on a distributed database system is provided. A snapshot list is generated for a transaction executing on the distributed database system. The snapshot list specifies snapshot times for a plurality of locations in the distributed database system. The snapshot times are determined based upon the location of a data item and the location where the transaction is executing. The selection of a version of the data item to be provided to the transaction is made based upon the snapshot time for the location associated with the data.
摘要翻译：提供了一种用于管理分布式数据库系统上的数据访问的方法和装置。为在分布式数据库系统上执行的事务生成快照列表。快照列表指定分布式数据库系统中多个位置的快照时间。快照时间是基于数据项的位置和事务正在执行的位置确定的。基于与数据相关联的位置的快照时间来选择要提供给事务的数据项的版本。

6. 发明授权

US6012060A Sharing, updating data blocks among multiple nodes in a distributed system 失效
标题翻译：在分布式系统中的多个节点之间共享，更新数据块
公开(公告)号：US6012060A
公开(公告)日：2000-01-04
申请号：US865651
申请日：1997-05-30
申请人： Juan R. Loaiza , Neil Macnaughton , Roger J. Bamford , William H. Bridge , Boris Klots
发明人： Juan R. Loaiza , Neil Macnaughton , Roger J. Bamford , William H. Bridge , Boris Klots
IPC分类号： G06F17/30
CPC分类号： G06F9/52 , Y10S707/99938 , Y10S707/99953
摘要： A method for preventing multiple pings. An embodiment of the invention detects requests of data blocks entailing pings likely to cause additional pings. The servicing of requests involving a pings likely to cause additional pings is deferred until a service enabling conditions occurs. Another embodiment of the invention detects situations where by further updating a data block before pinging the data block use of resources on the remote node requesting the data block are reduced. The servicing of the request for the data block is deferred until a service enabling conditions occurs.
摘要翻译：一种防止多次ping的方法。本发明的一个实施例检测到可能导致额外ping的点的数据块的请求。涉及可能引起额外波的呼吸的请求的服务被推迟到发生服务使能条件。本发明的另一实施例检测在ping数据块之前进一步更新数据块的情况，数据块在远程节点上的资源使用被请求数据块减少。对数据块的请求的服务被延迟，直到发生服务使能条件。

7. 发明授权

US06507853B2 Recovering data from a failed cache using recovery logs of caches that updated the data 有权
标题翻译：使用更新数据的缓存的恢复日志从故障缓存中恢复数据
公开(公告)号：US06507853B2
公开(公告)日：2003-01-14
申请号：US09894521
申请日：2001-06-27
申请人： Roger J. Bamford , Boris Klots
发明人： Roger J. Bamford , Boris Klots
IPC分类号： G06F1730
CPC分类号： G06F11/1471 , G06F2201/80 , Y10S707/915 , Y10S707/99938 , Y10S707/99952 , Y10S707/99953 , Y10S707/99954
摘要： A method and apparatus are provided for transferring a resource from the cache of one database server to the cache of another database server without first writing the resource to disk. When a database server (Requestor) desires to modify a resource, the Requestor asks for the current version of the resource. The database server that has the current version (Holder) directly ships the current version to the Requestor. Upon shipping the version, the Holder loses permission to modify the resource, but continues to retain the resource in memory. When the retained version of the resource, or a later version thereof, is written to disk, the Holder can discard the retained version of the resource. Otherwise, the Holder does not discard the retained version. Using this technique, single-server failures are recovered without having to merge the recovery logs of the various database servers that had access to the resource.
摘要翻译：提供了一种方法和装置，用于将资源从一个数据库服务器的高速缓存传送到另一个数据库服务器的高速缓存，而无需首先将资源写入磁盘。当数据库服务器（请求者）希望修改资源时，请求者要求资源的当前版本。具有当前版本（Holder）的数据库服务器将当前版本直接发送到请求者。运送版本后，持有人将失去修改资源的权限，但继续将资源保留在内存中。当将资源的保留版本或其更新版本写入磁盘时，持有者可以丢弃资源的保留版本。否则，持有人不会丢弃保留的版本。使用此技术，恢复单服务器故障，而无需合并可访问资源的各种数据库服务器的恢复日志。

8. 发明授权

US6144983A Method and apparatus for dynamic lock granularity escalation and de-escalation in a computer system 失效
标题翻译：计算机系统中动态锁粒度递增和解除升级的方法和装置
公开(公告)号：US6144983A
公开(公告)日：2000-11-07
申请号：US94214
申请日：1998-06-09
申请人： Boris Klots , Roger J. Bamford
发明人： Boris Klots , Roger J. Bamford
IPC分类号： G06F9/46 , G06F9/00 , G06F15/00
CPC分类号： G06F9/52 , Y10S707/99938
摘要： A method and apparatus for dynamic lock granularity escalation and de-escalation in a computer system is provided. Upon receiving a request for a resource, a scope of a previously granted lock is modified. According to one embodiment, hash lock de-escalation is employed. In hash lock de-escalation, the scope of the previously granted lock held on a set of resources is reduced by de-escalating the previously granted lock from a coarser-grain lock to one or more finer-grain locks on members of the set. According to another embodiment, hash lock escalation is employed. In hash lock escalation, the scope of previously granted locks held on one or more members of the set of resources are released and promoted into a coarser-grain lock that covers the set of resources as well as the requested resource.
摘要翻译：提供了一种用于计算机系统中动态锁粒度升级和降级的方法和装置。在接收到对资源的请求后，修改先前授予的锁的范围。根据一个实施例，使用散列锁解除升级。在哈希锁解除升级中，通过将先前授予的锁从粗粒锁定降级到集合成员上的一个或多个更细粒度的锁，减少了保存在一组资源上的先前授权的锁的范围。根据另一个实施例，采用散列锁升级。在哈希锁升级中，在资源集合的一个或多个成员上保留的先前授予的锁的范围被释放并被提升为覆盖所述一组资源以及所请求的资源的粗粒度锁。

9. 发明授权

US06567827B2 Using a checkpoint to manage data that is shared by a plurality of nodes 有权
标题翻译：使用检查点来管理由多个节点共享的数据
公开(公告)号：US06567827B2
公开(公告)日：2003-05-20
申请号：US09894640
申请日：2001-06-27
申请人： Roger J. Bamford , Boris Klots
发明人： Roger J. Bamford , Boris Klots
IPC分类号： G06F1730
CPC分类号： G06F11/1471 , G06F2201/80 , Y10S707/915 , Y10S707/99938 , Y10S707/99952 , Y10S707/99953 , Y10S707/99954
摘要： A method and apparatus are provided for transferring a resource from the cache of one database server to the cache of another database server without first writing the resource to disk. When a database server (Requestor) desires to modify a resource, the Requestor asks for the current version of the resource. The database server that has the current version (Holder) directly ships the current version to the Requestor. Upon shipping the version, the Holder loses permission to modify the resource, but continues to retain the resource in memory. When the retained version of the resource, or a later version thereof, is written to disk, the Holder can discard the retained version of the resource. Otherwise, the Holder does not discard the retained version. Using this technique, single-server failures are recovered without having to merge the recovery logs of the various database servers that had access to the resource.
摘要翻译：提供了一种方法和装置，用于将资源从一个数据库服务器的高速缓存传送到另一个数据库服务器的高速缓存，而无需首先将资源写入磁盘。当数据库服务器（请求者）希望修改资源时，请求者要求资源的当前版本。具有当前版本（Holder）的数据库服务器将当前版本直接发送到请求者。运送版本后，持有人将失去修改资源的权限，但继续将资源保留在内存中。当将资源的保留版本或其更新版本写入磁盘时，持有者可以丢弃资源的保留版本。否则，持有人不会丢弃保留的版本。使用此技术，恢复单服务器故障，而无需合并可访问资源的各种数据库服务器的恢复日志。

10. 发明授权

US6112281A I/O forwarding in a cache coherent shared disk computer system 失效
标题翻译： I / O转发在缓存一致的共享磁盘计算机系统中
公开(公告)号：US6112281A
公开(公告)日：2000-08-29
申请号：US946084
申请日：1997-10-07
申请人： Roger J. Bamford , Boris Klots
发明人： Roger J. Bamford , Boris Klots
IPC分类号： G06F3/06 , G06F9/46 , G06F12/00 , G06F12/08
CPC分类号： G06F9/52 , G06F12/0813 , G06F12/0815 , G06F12/0866 , G06F2212/311
摘要： A method and apparatus for I/O forwarding in a cache coherent shared disk computer system is provided. According to the method, a requesting node transmits a request for requested data to a managing node. The managing node receives the read request from the requesting node and grants a lock on the requested data. The managing node then forwards data that identifies the requested data to a disk controller. The disk controller receives the data that identifies the requested data from the managing node and reads a data item, based on the data that identifies the requested data, from a shared disk. After reading the data item from the shared disk, the disk controller transmits the data item to the requesting node. In one embodiment, an I/O destination handle is generated that identifies a read request and a buffer cache address to which the data item should be copied. The I/O destination handle is transmitted to the disk controller to facilitate transmission and processing of the data item from the disk controller to the requesting node. As a result of forwarding data that identifies the requested data directly from the managing node to the disk controller ("I/O forwarding"), the duration of a stall is reduced, contention on resources of the system is reduced and a context switch is eliminated.
摘要翻译：提供了一种用于缓存一致共享磁盘计算机系统中的I / O转发的方法和装置。根据该方法，请求节点向管理节点发送请求数据的请求。管理节点从请求节点接收读请求，并对所请求的数据进行锁定。管理节点然后将识别所请求数据的数据转发到磁盘控制器。磁盘控制器从管理节点接收标识所请求数据的数据，并从共享磁盘读取数据项，基于标识所请求数据的数据。从共享磁盘读取数据项后，磁盘控制器将数据项发送到请求节点。在一个实施例中，生成识别读取请求的I / O目的地句柄和应该复制数据项的缓冲器高速缓存地址。将I / O目的地句柄发送到磁盘控制器，以便于将数据项从磁盘控制器发送到处理请求节点。作为将从管理节点直接识别请求的数据的数据转发到磁盘控制器（“I / O转发”）的结果，减少停顿的持续时间，减少对系统的资源的争用，并且上下文切换是消除了

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