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    Apparatus and method for accessing data in a data processing system including an automated storage library
    1.
    发明公开
    Apparatus and method for accessing data in a data processing system including an automated storage library 失效
    装置和方法用于在数据处理系统中的数据访问具有自动数据存储库。

    公开(公告)号：EP0458555A2

    公开(公告)日：1991-11-27

    申请号：EP91304505.0

    申请日：1991-05-20

    申请人： INTERNATIONAL BUSINESS MACHINES CORPORATION

    发明人： Monahan, Christopher John ,  Monahan, Mary Linda ,  Willson, Dennis Lee ,  Willson, Lee Douglas

    IPC分类号： G06F3/06

    CPC分类号： G06F3/0601 ,  G06F2003/0697 ,  G11B17/228 ,  G11B27/002 ,  G11B27/34 ,  G11B27/36 ,  G11B2220/20 ,  G11B2220/41

    摘要： A data processing system including an automated storage library (1) for which the management thereof is transparent to a requester is disclosed. A system controller in the library provides the internal management of the library. To access a file in the library, a requester need only specify to the system controller the volume on which the file is located, permitting the use of a standard file access method for a single peripheral storage device. A path format which is the same as that used for a single, peripheral storage device, except that the peripheral storage device designator is replaced with a designator (35) for the automated storage library (1) and a volume label (36) is inserted as a subdirectory path element. The system controller determines, independently of the data processing system, which peripheral storage device a data storage medium is to be mounted in.

    摘要翻译： 包括自动存储库的数据处理系统（1）的量，它们的管理是透明的请求者是游离缺失盘。 在图书馆系统控制器提供了图书馆的内部管理。 访问一个文件在库中，请求仅需要指定给系统控制器上的文件所在的体积，从而允许单个外围存储设备中使用的标准文件存取方法的。 路径格式的所有这是因为没有用于单个，外围存储装置中的相同，不同之处做了外围存储设备标志被替换为自动存储库（1）和卷标一个标志（35）（36）被插入 作为子目录路径元件。 系统控制器确定的地雷，unabhängig的数据处理系统，它的外围存储设备中的数据存储介质被安装在

    Maximising hit ratio in a data storage hierarchy
    3.
    发明公开
    Maximising hit ratio in a data storage hierarchy 失效
    在einer Datenspeicherhierarchie中的Maximierung der Trefferrate。

    公开(公告)号：EP0532335A1

    公开(公告)日：1993-03-17

    申请号：EP92308267.1

    申请日：1992-09-10

    申请人： INTERNATIONAL BUSINESS MACHINES CORPORATION

    发明人： Willson, Lee Douglas ,  Winarski, Daniel James

    IPC分类号： G06F12/12

    CPC分类号： G11B17/225 ,  G06F3/0601 ,  G06F12/122 ,  G06F2003/0697 ,  G11B17/228 ,  G11B27/002 ,  G11B27/36 ,  G11B2220/20 ,  G11B2220/41

    摘要： The hit ratio in an automated storage library 1 is maximised by tracking the frequency of usage of each file and rewriteable storage medium 3 therein. For each file therein, the library 1 counts the number of times such files are accessed. For each storage medium 3 therein, the library 1 counts the number of mounts thereof. Periodically, the usage statistics are reviewed to determine the most frequently used files and storage media 3 in the library 1. The most frequently used files are then transferred to the most frequently used storage media, which then become still more frequently used. The less frequently used files are transferred to the less frequently used storage media, which become still less frequently used. By definition, the most frequently used storage media are the most likely to be mounted, thereby increasing the hit ratio.

    摘要翻译： 通过跟踪每个文件和可重写存储介质3的使用频率，使自动存储库1中的命中率最大化。 对于其中的每个文件，库1对这些文件进行访问的次数进行计数。 对于其中的每个存储介质3，库1对其的安装数进行计数。 定期查看使用统计信息以确定库1中最常用的文件和存储介质3.最常用的文件然后被传送到最常用的存储介质，然后它们变得更频繁地被使用。 较不频繁使用的文件被传送到较不频繁使用的存储介质，这些存储介质的使用频率越来越低。 根据定义，最常用的存储介质是最有可能安装的，从而提高命中率。