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1. 发明申请

US20070083641A1 Using a standby data storage system to detect the health of a cluster of data storage servers 有权
标题翻译：使用备用数据存储系统来检测数据存储服务器集群的运行状况
公开(公告)号：US20070083641A1
公开(公告)日：2007-04-12
申请号：US11245868
申请日：2005-10-07
申请人： Wei Hu , Yunrui Li , Juan Loaiza
发明人： Wei Hu , Yunrui Li , Juan Loaiza
IPC分类号： G06F15/173
CPC分类号： H04L67/1097 , H04L41/0681 , H04L41/0893 , H04L43/00 , H04L43/0817
摘要： Detecting an operating condition in a multi-server data storage system. One or more of the data storage servers are designated with a status within the cluster. The designating may be performed by at least one of the data storage servers. The status is encoded into log data having records that report changes to the primary data storage performed by the cluster of data storage servers. The log data is transmitted from the primary data storage to the standby data storage system. The standby data storage system determines an operating condition of the cluster of data storage servers based, at least in part, on the status.
摘要翻译：检测多服务器数据存储系统中的运行状况。一个或多个数据存储服务器被指定为集群内的状态。指定可以由数据存储服务器中的至少一个来执行。该状态被编码成具有报告对由数据存储服务器集群执行的主数据存储的更改的记录的日志数据。日志数据从主数据存储器传送到备用数据存储系统。备用数据存储系统至少部分地基于状态来确定数据存储服务器的集群的操作条件。

2. 发明申请

US20060101033A1 High-performance log-based processing 有权
公开(公告)号：US20060101033A1
公开(公告)日：2006-05-11
申请号：US10982135
申请日：2004-11-05
申请人： Wei Hu , Yunrui Li , Vinay Srihari , Ramana Yerneni
发明人： Wei Hu , Yunrui Li , Vinay Srihari , Ramana Yerneni
IPC分类号： G06F7/00
CPC分类号： G06F9/46 , G06F11/1464 , G06F11/1471 , G06F11/2035 , G06F11/2046 , G06F11/2097 , G06F2201/80
摘要： Each of a plurality of Worker processes are allowed to perform any and all of the following tasks involving logged work items: (1) reading a subset of the work items from a log; (2) sequentially ordering work items for corresponding data objects; (3) applying a sequentially ordered set of work items to a corresponding data object; and (4) transmitting a subset of work items to a Worker process running on another database server in a cluster, if necessary. These tasks can be performed concurrently, at will, and as available, by the Worker processes. An improved checkpointing technique eliminates the need for the Worker processes to get to a synchronization point and stop. Instead, a Coordinator process examines the current state of progress of the Worker processes and computes a past point in the sequence of work items at which all work items before that point have been completely processed, and records this point as the checkpoint.

3. 发明授权

US07337234B2 Retry technique for multi-tier network communication systems 有权
标题翻译：多层网络通信系统的重试技术
公开(公告)号：US07337234B2
公开(公告)日：2008-02-26
申请号：US10118203
申请日：2002-04-05
申请人： Wei Hu , Juan Loaiza
发明人： Wei Hu , Juan Loaiza
IPC分类号： G06F15/173 , G06F15/16 , G08C25/02 , H04L12/28
CPC分类号： H04L67/1002 , H04L69/40
摘要： A system is provided to manage retry communications between a client and a data source. The system includes a plurality of logical components that sequentially combine to form a communication path for a client communication. At least one of the components in the communication path is designated as a retry component. The retry component retries failed client communications for all of the components in the communication path.
摘要翻译：提供了一种系统来管理客户端和数据源之间的重试通信。系统包括多个逻辑组件，其顺序地组合以形成用于客户端通信的通信路径。通信路径中的至少一个组件被指定为重试组件。重试组件重试针对通信路径中所有组件的客户端通信失败。

4. 发明申请

US20060200497A1 Lost write detection and repair 有权
公开(公告)号：US20060200497A1
公开(公告)日：2006-09-07
申请号：US11072111
申请日：2005-03-03
申请人： Wei Hu , Mark Dilman , J. Lee , Juan Loaiza , Vinay Srihari
发明人： Wei Hu , Mark Dilman , J. Lee , Juan Loaiza , Vinay Srihari
IPC分类号： G06F17/30
CPC分类号： G06F11/1471 , G06F11/2094 , G06F2201/80 , G06F2211/1007 , Y10S707/99954
摘要： Techniques are provided for detecting lost writes so that data corruption can be avoided. According to one technique, lost writes are detected by comparing version numbers that are indicated in redo log entries with version numbers that are indicated in corresponding blocks in a standby database. According to one technique, which may be used in conjunction with the above technique, lost writes are detected by logging read operations that occur relative to a primary database, and comparing version numbers that are indicated in read log entries with version numbers that are indicated in corresponding blocks in a standby database. According to one technique, lost writes are detected by comparing, in response to read operations, (a) version numbers that are stored in a persistent in-memory cache with (b) version numbers that are indicated in corresponding blocks that are read from a primary database.

5. 发明申请

US20050256908A1 Transportable database 有权
标题翻译：可运输数据库
公开(公告)号：US20050256908A1
公开(公告)日：2005-11-17
申请号：US10966961
申请日：2004-10-15
申请人： Wanli Yang , Bipul Sinha , Amit Ganesh , Wei Hu , Alok Pareek , Alexander Hwang , Steven Wertheimer , Francisco Sanchez , Dmitry Potapov , Shen-Ban Meng , Juan Loaiza , William Bridge , J. Lee
发明人： Wanli Yang , Bipul Sinha , Amit Ganesh , Wei Hu , Alok Pareek , Alexander Hwang , Steven Wertheimer , Francisco Sanchez , Dmitry Potapov , Shen-Ban Meng , Juan Loaiza , William Bridge , J. Lee
IPC分类号： G06F7/00 , G06F17/30
CPC分类号： G06F17/30569 , Y10S707/99942
摘要： A method and apparatus for creating a target database on a target platform based on a source database on a source platform is provided. A target database is created on the target platform based on data, metadata (for example, data in the system tablespace and control files), and external objects (for example, password files and externally stored tables) comprised within the source database. Data and metadata stored in tablespaces of the source database are converted to the format compatible with the target platform. The conversion of the data and metadata may be performed either at the source database or the target database. Redo information and undo information of the source database are not copied from the source database to the target database. Certain files, e.g., a password files, and links to externally stored object may be recreated on the target database.
摘要翻译：提供了一种用于在源平台上基于源数据库在目标平台上创建目标数据库的方法和装置。基于源数据库中包含的数据，元数据（例如，系统表空间和控制文件中的数据）以及外部对象（例如，密码文件和外部存储的表），在目标平台上创建目标数据库。存储在源数据库的表空间中的数据和元数据将转换为与目标平台兼容的格式。可以在源数据库或目标数据库执行数据和元数据的转换。源数据库的重做信息和撤消信息不会从源数据库复制到目标数据库。可以在目标数据库上重新创建某些文件，例如密码文件和到外部存储对象的链接。

6. 发明授权

US07631091B2 Method and mechanism of improving system utilization and throughput 有权
标题翻译：提高系统利用率和吞吐量的方法和机制
公开(公告)号：US07631091B2
公开(公告)日：2009-12-08
申请号：US11060897
申请日：2005-02-18
申请人： Wei Hu , Juan Loaiza , Ramana Yerneni
发明人： Wei Hu , Juan Loaiza , Ramana Yerneni
IPC分类号： G06F15/16 , G06F12/00
CPC分类号： G06F17/30463 , G06F17/301
摘要： Disclosed are methods, systems, and mediums for improving system utilization and throughput. In some embodiments, application requests received at a primary site are routed to a secondary site for processing when the requests are found to be suitable for processing at the secondary site.
摘要翻译：公开了用于提高系统利用率和吞吐量的方法，系统和介质。在一些实施例中，当发现请求适合于辅助站点处理时，在主站点处接收到的应用请求被路由到辅站点以进行处理。

7. 发明申请

US20060190761A1 Method and mechanism of improving system utilization and throughput 有权
公开(公告)号：US20060190761A1
公开(公告)日：2006-08-24
申请号：US11060897
申请日：2005-02-18
申请人： Wei Hu , Juan Loaiza , Ramana Yerneni
发明人： Wei Hu , Juan Loaiza , Ramana Yerneni
IPC分类号： G06F11/00
CPC分类号： G06F17/30463 , G06F17/301
摘要： Disclosed are methods, systems, and mediums for improving system utilization and throughput. In some embodiments, application requests received at a primary site are routed to a secondary site for processing when the requests are found to be suitable for processing at the secondary site.

8. 发明授权

US08615578B2 Using a standby data storage system to detect the health of a cluster of data storage servers 有权
标题翻译：使用备用数据存储系统来检测数据存储服务器集群的运行状况
公开(公告)号：US08615578B2
公开(公告)日：2013-12-24
申请号：US11245868
申请日：2005-10-07
申请人： Wei Hu , Yunrui Li , Juan R. Loaiza
发明人： Wei Hu , Yunrui Li , Juan R. Loaiza
IPC分类号： G06F15/173 , G06F11/00
CPC分类号： H04L67/1097 , H04L41/0681 , H04L41/0893 , H04L43/00 , H04L43/0817
摘要： Detecting an operating condition in a multi-server data storage system. One or more of the data storage servers are designated with a status within the cluster. The designating may be performed by at least one of the data storage servers. The status is encoded into log data having records that report changes to the primary data storage performed by the cluster of data storage servers. The log data is transmitted from the primary data storage to the standby data storage system. The standby data storage system determines an operating condition of the cluster of data storage servers based, at least in part, on the status.
摘要翻译：检测多服务器数据存储系统中的运行状况。一个或多个数据存储服务器被指定为集群内的状态。指定可以由数据存储服务器中的至少一个来执行。该状态被编码成具有报告对由数据存储服务器集群执行的主数据存储的更改的记录的日志数据。日志数据从主数据存储器传送到备用数据存储系统。备用数据存储系统至少部分地基于状态来确定数据存储服务器的集群的操作条件。

9. 发明授权

US08438169B2 High-performance log-based processing 有权
公开(公告)号：US08438169B2
公开(公告)日：2013-05-07
申请号：US10982135
申请日：2004-11-05
申请人： Wei Hu , Yunrui Li , Vinay Srihari , Ramana Yemeni
发明人： Wei Hu , Yunrui Li , Vinay Srihari , Ramana Yemeni
IPC分类号： G06F17/30
摘要： Each of a plurality of Worker processes are allowed to perform any and all of the following tasks involving logged work items: (1) reading a subset of the work items from a log; (2) sequentially ordering work items for corresponding data objects; (3) applying a sequentially ordered set of work items to a corresponding data object; and (4) transmitting a subset of work items to a Worker process running on another database server in a cluster, if necessary. These tasks can be performed concurrently, at will, and as available, by the Worker processes. An improved checkpointing technique eliminates the need for the Worker processes to get to a synchronization point and stop. Instead, a Coordinator process examines the current state of progress of the Worker processes and computes a past point in the sequence of work items at which all work items before that point have been completely processed, and records this point as the checkpoint.

10. 发明授权

US08566326B2 High-performance log-based processing 有权
标题翻译：高性能的基于日志的处理
公开(公告)号：US08566326B2
公开(公告)日：2013-10-22
申请号：US10982135
申请日：2004-11-05
申请人： Wei Hu , Yunrui Li , Vinay Srihari , Ramana Yemeni
发明人： Wei Hu , Yunrui Li , Vinay Srihari , Ramana Yemeni
IPC分类号： G06F17/30
CPC分类号： G06F9/46 , G06F11/1464 , G06F11/1471 , G06F11/2035 , G06F11/2046 , G06F11/2097 , G06F2201/80
摘要： Each of a plurality of Worker processes are allowed to perform any and all of the following tasks involving logged work items: (1) reading a subset of the work items from a log; (2) sequentially ordering work items for corresponding data objects; (3) applying a sequentially ordered set of work items to a corresponding data object; and (4) transmitting a subset of work items to a Worker process running on another database server in a cluster, if necessary. These tasks can be performed concurrently, at will, and as available, by the Worker processes. An improved checkpointing technique eliminates the need for the Worker processes to get to a synchronization point and stop. Instead, a Coordinator process examines the current state of progress of the Worker processes and computes a past point in the sequence of work items at which all work items before that point have been completely processed, and records this point as the checkpoint.
摘要翻译：允许多个Worker进程中的每一个执行涉及记录的工作项的任何和所有以下任务：（1）从日志读取工作项的子集; （2）顺序排列相应数据对象的工作项; （3）将顺序排列的工作项集合应用于对应的数据对象; （4）如果需要，将工作项的子集发送到在群集中的另一数据库服务器上运行的工作进程。这些任务可以在工作进程的同时，随意和可用的情况下执行。改进的检查点技术消除了Worker进程到达同步点并停止的需要。相反，协调器进程将检查工作进程的当前状态，并计算工作项序列中的过去点，在此之前，该点之前的所有工作项都已完全处理，并将此点记录为检查点。

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