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公开(公告)号：US07231564B2
公开(公告)日：2007-06-12
申请号：US10824842
申请日：2004-04-14
CPC分类号： G06F11/1004 , G06F11/1008 , G06F11/1076 , G11B20/18
摘要： An approach for performing data block location verification includes inserting an address value into a data block that identifies a desired location in nonvolatile memory for storing the data block. Prior to performing an operation that stores the data block to the nonvolatile memory, a determination is made whether the address value in the data block correctly identifies the location in nonvolatile memory into which the operation will store the data block. The operation is performed only if the address value in the data block correctly identifies the location in nonvolatile memory into which the operation will store the data block. After the data block is read from the nonvolatile memory, an additional determination may be made to determine whether the data block was read from the desired location in the nonvolatile memory.
摘要翻译： 用于执行数据块位置验证的方法包括将地址值插入到标识用于存储数据块的非易失性存储器中的期望位置的数据块中。 在执行将数据块存储到非易失性存储器的操作之前，确定数据块中的地址值是否正确地识别非易失性存储器中的操作将存储数据块的位置。 仅当数据块中的地址值正确识别非易失性存储器中的操作将存储数据块的位置时才执行该操作。 在从非易失性存储器读取数据块之后，可以进一步确定是否从非易失性存储器中的期望位置读取数据块。
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公开(公告)号：US06928607B2
公开(公告)日：2005-08-09
申请号：US09765680
申请日：2001-01-18
CPC分类号： G06F11/1004 , G06F11/1008 , G06F11/1076 , G11B20/18
摘要： A method and apparatus is provided for maintaining data integrity. According to the method, a physical checksum calculation is performed on a block of data. After performing the physical checksum calculation, a logical check is performed on the data contained with the block of data. If the block of data passes the logical check, then the block of data may be written to nonvolatile memory. Thereafter, when the block of data is read from nonvolatile memory a physical checksum verification procedure is performed on the block of data to determine whether the block of data was corrupted after performing the logical check on the data contained with the block of data.
摘要翻译： 提供了一种用于维护数据完整性的方法和装置。 根据该方法，对数据块执行物理校验和计算。 在执行物理校验和计算之后，对包含在数据块中的数据执行逻辑检查。 如果数据块通过逻辑检查，则可将数据块写入非易失性存储器。 此后，当从非易失性存储器读取数据块时，对数据块执行物理校验和验证过程，以便在对包含在数据块中的数据进行逻辑检查之后确定数据块是否已被破坏。
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公开(公告)号：US07246281B2
公开(公告)日：2007-07-17
申请号：US11386495
申请日：2006-03-21
CPC分类号： G06F11/1004 , G06F11/0727 , G06F11/0751 , G06F11/1076 , G06F2211/1007 , G11B20/18
摘要： A method and apparatus is provided for maintaining data integrity. According to the method, a physical checksum calculation is performed on a block of data. After performing the physical checksum calculation, a logical check is performed on the data contained with the block of data. If the block of data passes the logical check, then the block of data may be written to nonvolatile memory. Thereafter, when the block of data is read from nonvolatile memory a physical checksum verification procedure is performed on the block of data to determine whether the block of data was corrupted after performing the logical check on the data contained with the block of data.
摘要翻译： 提供了一种用于维护数据完整性的方法和装置。 根据该方法，对数据块执行物理校验和计算。 在执行物理校验和计算之后，对包含在数据块中的数据执行逻辑检查。 如果数据块通过逻辑检查，则可将数据块写入非易失性存储器。 此后，当从非易失性存储器读取数据块时，对数据块执行物理校验和验证过程，以便在对包含在数据块中的数据执行逻辑检查之后，确定数据块是否已损坏。
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公开(公告)号：US07020835B2
公开(公告)日：2006-03-28
申请号：US10133002
申请日：2002-04-25
CPC分类号： G06F11/1004 , G06F11/0727 , G06F11/0751 , G06F11/1076 , G06F2211/1007 , G11B20/18
摘要： A method and apparatus is provided for maintaining data integrity. According to the method, a physical checksum calculation is performed on a block of data. After performing the physical checksum calculation, a logical check is performed on the data contained with the block of data. If the block of data passes the logical check, then the block of data may be written to nonvolatile memory. Thereafter, when the block of data is read from nonvolatile memory a physical checksum verification procedure is performed on the block of data to determine whether the block of data was corrupted after performing the logical check on the data contained with the block of data.
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公开(公告)号：US10592416B2
公开(公告)日：2020-03-17
申请号：US13288785
申请日：2011-11-03
申请人： Bharat Chandra Baddepudi , Juan R. Loaiza , Wei-Ming Hu , Kothanda Umamageswaran , Alex Tsukerman , Boris Erlikhman , J. William Lee , Jia Shi , Kiran B. Goyal , Selcuk Aya
发明人： Bharat Chandra Baddepudi , Juan R. Loaiza , Wei-Ming Hu , Kothanda Umamageswaran , Alex Tsukerman , Boris Erlikhman , J. William Lee , Jia Shi , Kiran B. Goyal , Selcuk Aya
IPC分类号： G06F12/08 , G06F12/0868
摘要： A storage device uses non-volatile memory devices for caching. The storage device operates in a mode referred to herein as write-back mode. In write-back mode, a storage device responds to a request to write data by persistently writing the data to a cache in a non-volatile memory device and acknowledges to the requestor that the data is written persistently in the storage device. The acknowledgement is sent without necessarily having written the data that was requested to be written to primary storage. Instead, the data is written to primary storage later.
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公开(公告)号：US20120054158A1
公开(公告)日：2012-03-01
申请号：US12871795
申请日：2010-08-30
申请人： Wei Ming Hu , Juan R. Loaiza , Yunrui Li , Vinay H. Srihari
发明人： Wei Ming Hu , Juan R. Loaiza , Yunrui Li , Vinay H. Srihari
CPC分类号： G06F17/30156 , G06F12/0866 , G06F17/30159 , G06F17/30592 , G06F2212/465
摘要： A method and system for replicating database data is provided. One or more standby database replicas can be used for servicing read-only queries, and the amount of storage required is scalable in the size of the primary database storage. One technique is described for combining physical database replication to multiple physical databases residing within a common storage system that performs de-duplication. Having multiple physical databases allows for many read-only queries to be processed, and the de-duplicating storage system provides scalability in the size of the primary database storage. Another technique uses one or more diskless standby database systems that share a read-only copy of physical standby database files. Notification messages provide consistency between each diskless system's in-memory cache and the state of the shared database files. Use of a transaction sequence number ensures that each database system only accesses versions of data blocks that are consistent with a transaction checkpoint.
摘要翻译： 提供了一种用于复制数据库数据的方法和系统。 一个或多个备用数据库副本可用于维护只读查询，并且所需的存储量可在主数据库存储的大小上扩展。 描述了一种将物理数据库复制与驻留在执行重复数据删除的公共存储系统中的多个物理数据库进行组合的技术。 拥有多个物理数据库可以处理许多只读查询，并且重复存储系统提供主数据库存储大小的可扩展性。 另一种技术使用一个或多个共享物理备用数据库文件的只读副本的无盘备用数据库系统。 通知消息提供每个无盘系统的内存缓存与共享数据库文件的状态之间的一致性。 使用事务序列号确保每个数据库系统只能访问与事务检查点一致的数据块版本。
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公开(公告)号：US20110066791A1
公开(公告)日：2011-03-17
申请号：US12631985
申请日：2009-12-07
申请人： Kiran Badrinarain Goyal , Neil J.S. Macnaughton , Eugene Ho , Adam Y. Lee , Vipin Gokhale , Wei-Ming Hu , Juan R. Loaiza , Kothanda Umamageswaran , Bharat C.V. Baddepudi , Boris Erlikhman , Alexander Tsukerman , Selcuk Aya , Roger Hansen , Adrian Ng
发明人： Kiran Badrinarain Goyal , Neil J.S. Macnaughton , Eugene Ho , Adam Y. Lee , Vipin Gokhale , Wei-Ming Hu , Juan R. Loaiza , Kothanda Umamageswaran , Bharat C.V. Baddepudi , Boris Erlikhman , Alexander Tsukerman , Selcuk Aya , Roger Hansen , Adrian Ng
IPC分类号： G06F12/00
CPC分类号： G06F12/0866 , G06F12/084 , G06F12/0888 , G06F12/0897 , G06F17/30312 , G06F17/3048 , G06F2212/283 , G06F2212/311 , G06F2212/312 , G06F2212/465
摘要： Techniques are provided for using an intermediate cache between the shared cache of a database server and the non-volatile storage of a storage system. The intermediate cache may be local to the machine upon which the database server is executing, or may be implemented within the storage system. In one embodiment, the database system includes both a DB server-side intermediate cache, and a storage-side intermediate cache. The caching policies used to populate the intermediate cache are intelligent, taking into account factors that may include which database object an item belongs to, the item type of the item, a characteristic of the item; or the database operation in which the item is involved.
摘要翻译： 提供了在数据库服务器的共享缓存和存储系统的非易失性存储之间使用中间缓存的技术。 中间缓存可以是数据库服务器在其上执行的机器的本地，或者可以在存储系统内实现。 在一个实施例中，数据库系统包括DB服务器侧中间缓存和存储侧中间缓存。 用于填充中间缓存的缓存策略是智能的，考虑到可能包括项目属于哪个数据库对象的因素，项目的项目类型，项目的特征; 或涉及项目的数据库操作。
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公开(公告)号：US08589361B2
公开(公告)日：2013-11-19
申请号：US12871795
申请日：2010-08-30
申请人： Wei Ming Hu , Juan R. Loaiza , Yunrui Li , Vinay H. Srihari
发明人： Wei Ming Hu , Juan R. Loaiza , Yunrui Li , Vinay H. Srihari
IPC分类号： G06F17/00
CPC分类号： G06F17/30156 , G06F12/0866 , G06F17/30159 , G06F17/30592 , G06F2212/465
摘要： A method and system for replicating database data is provided. One or more standby database replicas can be used for servicing read-only queries, and the amount of storage required is scalable in the size of the primary database storage. One technique is described for combining physical database replication to multiple physical databases residing within a common storage system that performs de-duplication. Having multiple physical databases allows for many read-only queries to be processed, and the de-duplicating storage system provides scalability in the size of the primary database storage. Another technique uses one or more diskless standby database systems that share a read-only copy of physical standby database files. Notification messages provide consistency between each diskless system's in-memory cache and the state of the shared database files. Use of a transaction sequence number ensures that each database system only accesses versions of data blocks that are consistent with a transaction checkpoint.
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9.发明授权Method and system for diagnostic preservation of the state of a computer system 有权用于诊断计算机系统状态的方法和系统公开(公告)号：US07376864B1
公开(公告)日：2008-05-20
申请号：US09223660
申请日：1998-12-30
申请人： Wei Ming Hu , Juan R. Loaiza
发明人： Wei Ming Hu , Juan R. Loaiza
IPC分类号： G06F11/00
CPC分类号： G06F11/366 , G06F11/2028 , G06F11/2033
摘要： A method and system for diagnostic preservation of the state of resources in a computer system after a failure is disclosed. An aspect of the invention is directed to the real-time diagnostic analysis of a computer system after a failure, in which the state of resources needed for the diagnostic analysis are preserved from the time of the failure. The computer system is then accessed by using other resources on the computer system, and the preserved resources are analyzed to debug the failure.
摘要翻译： 公开了一种用于在故障后计算机系统中的资源状态的诊断保存的方法和系统。 本发明的一个方面涉及在故障之后的计算机系统的实时诊断分析，其中从故障发生时保留诊断分析所需的资源的状态。 然后通过使用计算机系统上的其他资源来访问计算机系统，并分析保留的资源来调试故障。
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公开(公告)号：US07039773B2
公开(公告)日：2006-05-02
申请号：US10426471
申请日：2003-04-29
申请人： Wei Ming Hu , Juan R. Loaiza , Roger J. Bamford , Vikram Joshi , Arvind Nithrakashyap , Tudor Bosman , Vinay Srihari , Alok Pareek
发明人： Wei Ming Hu , Juan R. Loaiza , Roger J. Bamford , Vikram Joshi , Arvind Nithrakashyap , Tudor Bosman , Vinay Srihari , Alok Pareek
IPC分类号： G06F12/00
CPC分类号： G06F17/30595 , Y10S707/99953
摘要： An improved method, mechanism, and system for implementing, generating, and maintaining records, such as redo records and redo logs in a database system, are disclosed. Multiple sets of records may be created and combined into a partially ordered (or non-ordered) group of records, which are later collectively ordered or sorted as needed to create an fully ordered set of records. With respect to a database system, redo generation bottleneck is minimized by providing multiple in-memory redo buffers that are available to hold redo records generated by multiple threads of execution. When the in-memory redo buffers are written to a persistent storage medium, no specific ordering needs to be specified with respect to the redo records from the different in-memory redo buffers. While the collective group of records may not be ordered, the written-out redo records may be partially ordered based upon the ordered redo records from within individual in-memory redo buffers. At recovery, ordering and/or merging of redo records may occur to satisfy database consistency requirements.
摘要翻译： 公开了一种用于在数据库系统中实现，生成和维护记录（如重做记录和重做日志）的改进方法，机制和系统。 可以创建多组记录，并将其组合成部分有序（或非有序）的记录组，这些记录集合随后根据需要进行统一排序或排序以创建完全有序的记录集。 对于数据库系统，通过提供多个可用于保存由多个执行线程生成的重做记录的内存中重做缓冲区，可以使重做生成瓶颈最小化。 当内存中重做缓冲区被写入持久存储介质时，不需要针对来自不同内存中重做缓冲区的重做记录指定特定顺序。 虽然可能不会对集体记录进行排序，但是写出的重做记录可能会根据内部存储器重做缓冲区内的重做记录进行部分排序。 在恢复时，可能会发生重做记录的排序和/或合并，以满足数据库一致性要求。
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