Data integrity verification mechanism
    22.
    发明授权
    Data integrity verification mechanism 有权
    数据完整性验证机制

    公开(公告)号:US06928607B2

    公开(公告)日:2005-08-09

    申请号:US09765680

    申请日:2001-01-18

    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。

    Method and apparatus for authenticating a client to a server in computer
systems which support different security mechanisms
    23.
    发明授权
    Method and apparatus for authenticating a client to a server in computer systems which support different security mechanisms 失效
    用于向支持不同安全机制的计算机系统中的服务器认证客户端的方法和装置

    公开(公告)号:US5586260A

    公开(公告)日:1996-12-17

    申请号:US17231

    申请日:1993-02-12

    申请人: Wei-Ming Hu

    发明人: Wei-Ming Hu

    摘要: A method and corresponding apparatus for authenticating a client for a server when the client and server have different security mechanisms. An intermediary system known as an authentication gateway provides for authentication of the client using the client security mechanism, and impersonation of the client in a call to a server that the client wishes to access. The client logs in to the authentication gateway and provides a user name and password. Then the authentication gateway obtains and saves security credentials for the client, returning an access key to the client. When the client wishes to call the server, the client calls the authentication gateway acting as a proxy server, and passes the access key, which is then used to retrieve the security credentials and to impersonate the client in a call to the server. Any output arguments resulting from the call to the server are returned to the client through the authentication gateway.

    摘要翻译: 当客户机和服务器具有不同的安全机制时,用于认证服务器的客户机的方法和相应的装置。 被称为认证网关的中间系统使用客户端安全机制来提供对客户端的认证,以及客户端对客户端希望访问的服务器的呼叫的模拟。 客户端登录认证网关并提供用户名和密码。 然后认证网关获取并保存客户端的安全凭证,将访问密钥返回给客户端。 当客户端希望呼叫服务器时,客户端将呼叫认证网关作为代理服务器,并传递访问密钥,然后访问密钥用于检索安全凭证,并在呼叫服务器时模拟客户端。 从服务器调用产生的任何输出参数都将通过验证网关返回给客户端。

    Techniques for reducing down time in updating applications with metadata
    25.
    发明授权
    Techniques for reducing down time in updating applications with metadata 有权
    减少使用元数据更新应用程序时间的技术

    公开(公告)号:US08589909B2

    公开(公告)日:2013-11-19

    申请号:US11972123

    申请日:2008-01-10

    IPC分类号: G06F9/44

    CPC分类号: G06F8/656

    摘要: A method and apparatus for reducing down time in updating applications with metadata is provided. The application contains both code and metadata. A copy of the application is made. A software update is installed on the copy of the application. During installation, the original application continues to run and service users, who may modify the metadata of the original application. Periodically, the metadata of the copy of the application is updated to incorporate changes to the metadata of the original application. When the software update is completed, users are prevented from further modifying the metadata of the original application. The metadata of the copy of the application is updated to incorporate the final changes to the metadata of the original application. Users are redirected from the original application to the copy of the application.

    摘要翻译: 提供了一种用于减少用元数据更新应用程序的时间的方法和装置。 该应用程序包含代码和元数据。 作出申请的副本。 软件更新安装在应用程序的副本上。 在安装过程中,原始应用程序继续运行并为用户提供服务,用户可以修改原始应用程序的元数据。 定期地,应用程序的副本的元数据被更新以包含对原始应用的元数据的改变。 软件更新完成后,用户无法进一步修改原始应用程序的元数据。 更新应用程序副本的元数据,以便对原始应用程序的元数据进行最终更改。 用户将从原始应用程序重定向到应用程序的副本。

    Flashback database
    26.
    发明授权
    Flashback database 有权
    闪回数据库

    公开(公告)号:US07631018B2

    公开(公告)日:2009-12-08

    申请号:US11652782

    申请日:2007-01-11

    IPC分类号: G06F17/30 G06F15/16

    摘要: Techniques are described herein for returning a repository to a prior state. The repository may be, for example a database, and the prior state may be, for example the consistent state that the database had at a particular point in time in the past. When a operator-caused error has been introduced to the database by changes made by an already-committed transaction, the techniques described herein may be used to recover from the error by returning the database to a point in time prior to the commit time of the transaction that introduced the error. The techniques involve the generation of “physical undo” information, and the use of the physical undo information in conjunction with physiological undo and physiological redo to efficiently return a repository to the prior state.

    摘要翻译: 这里描述了将存储库返回到先前状态的技术。 存储库可以是例如数据库,并且先前状态可以是例如数据库在过去的特定时间点具有的一致状态。 当通过已经提交的事务所做的改变将由操作者导致的错误引入到数据库时,本文描述的技术可以用于通过将数据库返回到在提交时间之前的时间点从错误中恢复 事务引入了错误。 这些技术包括生成“物理撤销”信息,以及使用物理撤消信息结合生理撤消和生理重做,以有效地将存储库返回到先前状态。

    Enhancements to data integrity verification mechanism
    27.
    发明授权
    Enhancements to data integrity verification mechanism 有权
    增强数据完整性验证机制

    公开(公告)号:US07246281B2

    公开(公告)日:2007-07-17

    申请号:US11386495

    申请日:2006-03-21

    IPC分类号: G11C29/00 G06F12/00 G06F9/26

    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。