Bandwidth utilization in a PPRC system
    1.
    发明授权
    Bandwidth utilization in a PPRC system 失效
    PPRC系统中的带宽利用率

    公开(公告)号:US07065623B2

    公开(公告)日:2006-06-20

    申请号:US10719536

    申请日:2003-11-20

    IPC分类号: G06F12/00

    摘要: Methods, system and computer program product are provided to improve the efficiency of data transfers in a PPRC environment. A block of data to be transferred is divided into tracks. Each track is allocated to a data mover task control block (TCB) with a master TCB being assigned to supervise the data mover TCBs. The tracks are then transferred from the primary storage controller to the secondary controller in a piped fashion over a link coupling the primary and secondary storage controllers. However, the usage of resources is monitored by a resource management algorithm and, if too many TCBs are being used for a transfer or if the supply of data mover TCBs is exhausted, the transfer is automatically switched to a serial, non-piped transfer with the master TCB serving as the data mover TCB for the remaining tracks. In addition, the various links coupling the primary and secondary storage controllers is monitored to determine which link will provide the fastest transfer. If, during a transfer of tracks over one link, a faster link is identified, the transfer may be switched to the second, faster link.

    摘要翻译: 提供了方法,系统和计算机程序产品,以提高PPRC环境中数据传输的效率。 要传输的数据块被划分为轨道。 每个轨道被分配给数据移动器任务控制块(TCB),其中主TCB被分配以监视数据移动器TCB。 然后,通过连接主存储控制器和辅助存储控制器的链路,将轨道以管道方式从主存储控制器传送到次级控制器。 然而,资源的使用通过资源管理算法进行监控,如果太多的TCB被用于传输,或者如果数据移动器TCB的供应耗尽,则传输将自动切换到串行,非管道传输, 主TCB用作剩余磁道的数据移动器TCB。 此外,监视耦合主存储控制器和辅助存储控制器的各种链路,以确定哪个链路将提供最快的传输。 如果在通过一个链路传送轨道的过程中识别出更快的链路,则可以将传输切换到第二个更快的链路。

    Method to write data to an information storage and retrieval system
    6.
    发明授权
    Method to write data to an information storage and retrieval system 失效
    将数据写入信息存储和检索系统的方法

    公开(公告)号:US07546434B2

    公开(公告)日:2009-06-09

    申请号:US11158614

    申请日:2005-06-22

    IPC分类号: G06F12/00 G06F13/00 G06F13/28

    摘要: A method is disclosed to write data to an information storage and retrieval system comprising (n) volumes and a data cache, where that information storage and retrieval system is capable of communicating with one or more host computers. The method receives from a host computer an update for the (i)th volume, and determines the (i)th delay, where that (i)th delay is associated with the (i)th volume. The method then writes the update to said data cache interposing the (i)th delay without indicating to said host computer that the information storage and retrieval system is unavailable.

    摘要翻译: 公开了一种将数据写入包括(n)卷和数据高速缓存的信息存储和检索系统的方法,其中该信息存储和检索系统能够与一个或多个主计算机通信。 该方法从主计算机接收第(i)个卷的更新,并且确定第(i)个延迟,其中第(i)个延迟与第(i)个卷相关联。 该方法然后将更新写入所述数据高速缓冲存储器(第i个)延迟,而不向所述主计算机指示信息存储和检索系统不可用。