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    • 3. 发明公开
    • DATA PROCESSING SYSTEM AND METHOD OF HANDLING REQUESTS
    • DERNVERARBEITUNGSSYSTEM UND VERFAHREN ZUR ABWICKLUNG VON ANFORDERUNGEN
    • EP2082338A1
    • 2009-07-29
    • EP07803467.5
    • 2007-09-13
    • INTERNATIONAL BUSINESS MACHINES CORPORATION
    • TODD, Stephen, James
    • G06F17/30G06F11/20
    • G06F17/30362G06F17/30345
    • Methods, apparatus and computer programs are provided for managing service requests. The invention mitigates problems within a data processing environment that includes a data store running on a highly available data processing system. A plurality of distributed service requestors input service requests, and the service requests are replicated to at least two of a plurality of request processing components that are located within a communication path between the requestors and the data store. The method includes: preventing any request processing component that has not successfully claimed the service request from processing the service request; a first request processing component claiming responsibility for the service request; and the first request processing component processing its replica of the claimed service request, including accessing data within the data store. The method also includes preventing any of the plurality of request processing components from entering a duplicate claim to responsibility for the service request. In one embodiment, the request processing components comprise business logic for processing a received request, to determine what data access operations are required within the data store, and request dispatcher functions for handling asynchronous delivery of a replica of the request from the service requestor to the data store.
    • 提供方法,装置和计算机程序来管理服务请求。 本发明减轻了数据处理环境中的问题,包括在高度可用的数据处理系统上运行的数据存储。 多个分布式服务请求者输入服务请求,并且服务请求被复制到位于请求者和数据存储之间的通信路径内的多个请求处理组件中的至少两个。 该方法包括:防止尚未成功声明服务请求的任何请求处理组件处理服务请求; 第一请求处理组件声称对服务请求负责; 并且第一请求处理组件处理其要求保护的服务请求的副本,包括访问数据存储内的数据。 该方法还包括防止多个请求处理组件中的任何一个请求对服务请求负责。 在一个实施例中,请求处理组件包括用于处理接收到的请求的业务逻辑,以确定在数据存储内需要哪些数据访问操作,以及请求分派器功能,用于处理请求复制品从服务请求者到 数据存储。
    • 6. 发明公开
    • READ DEVICE FOR PROCESSING A READ ERROR, SYSTEM, ITS METHOD, AND PROGRAM
    • LESEEINRICHTUNG ZUM VERARBEITEN EINES LESEFEHLERS,SYSTEM,VERFAHREN UND PROGRAMMDAFÜR
    • EP2000897A2
    • 2008-12-10
    • EP07715163.7
    • 2007-03-02
    • International Business Machines Corporation
    • TOSAKA, EijiYOSHIMURA, KatsumiKATAGIRI, Takashi
    • G06F3/06G11B20/10G11B20/18
    • G11B20/1201G06F3/0617G06F3/0659G06F3/0682G11B20/1883G11B27/3027G11B27/34G11B27/36G11B2220/90
    • [Object]
      To provide a technique for continuing to read data rapidly and appropriately when a read error occurs.
      [Solution]
      A tape reader comprises a reading section for reading data in data units from a tape medium, a reading control section for controlling the data reading section to read data in accordance with a command from a host computer, and on condition that an error occurs in reading the data unit, to skip an error data unit where the error occurs and read the next readable data unit immediately after the error data unit, a computation section for computing the number of records and the number of boundary marks included in the data unit where the error is detected from the information on the records and boundary marks indicating the boundary of record block included in the data unit preceding to the error data unit and the information on the records and boundary marks included in the data unit next to the error data unit, and a communication section for sending the number information on the computed number of records and the computed number of boundary marks to the host computer.
    • 提供一种用于在发生读取错误时快速且适当地继续读取数据的技术。 磁带阅读器包括用于从磁带介质读取以数据为单位的数据的读取部分,读取控制部分,用于根据来自主计算机的命令控制数据读取部分读取数据,并且在错误的情况下 发生在读取数据单元时,跳过发生错误的错误数据单元并且在错误数据单元之后立即读取下一个可读数据单元,计算部分,用于计算记录数和包含在数据中的边界标记数 检测出错误的单元,其中记录的信息和指示包含在错误数据单元之前的数据单元中的记录块的边界的边界标记的信息以及包含在该误差旁边的数据单元中的记录和边界标记的信息 数据单元和通信部分,用于将计算出的记录数和计算出的边界标记数量的号码信息发送到主计算机。