Method, system, and program for asynchronous copy
    2.
    发明申请
    Method, system, and program for asynchronous copy 有权
    用于异步复制的方法,系统和程序

    公开(公告)号:US20050071586A1

    公开(公告)日:2005-03-31

    申请号:US10675317

    申请日:2003-09-29

    IPC分类号: G06F12/00 G06F12/08

    CPC分类号: G06F12/0835 G06F12/0826

    摘要: Disclosed is a technique for maintaining consistency of data. One or more blocks of data identified by a first structure are copied to form a consistent set of data. While not acknowledging completion of write requests to any blocks of data, a second structure is created, wherein the second structure indicates which blocks of data are modified while the consistent set of data is being formed. Also disclosed is a technique for asynchronous copy. Indicators are updated in a first structure for one or more blocks of data, wherein each indicator in the first structure indicates whether a corresponding block of data was modified since the block of data was last sent to remote storage. While copying the blocks of data identified by the indicators in the first structure as having been modified since the blocks of data were last sent to remote storage, indicators in a second structure are updated for the one or more blocks of data, wherein each indicator in the second structure indicates whether a corresponding block of data was modified while a consistent set of data is being formed.

    摘要翻译: 公开了一种保持数据一致性的技术。 由第一结构标识的一个或多个数据块被复制以形成一致的数据集。 在不向任何数据块确认写请求的完成的情况下,创建第二结构,其中第二结构指示在形成一致的数据集时修改数据块。 还公开了用于异步复制的技术。 指示符以用于一个或多个数据块的第一结构进行更新,其中第一结构中的每个指示符指示是否修改了相应的数据块,因为数据块最后发送到远程存储。 由于数据块最后发送到远程存储,将第一结构中由指示符标识的数据块复制为已被修改,因此对于一个或多个数据块更新了第二结构中的指示符,其中每个指示符 第二结构指示在形成一致的一组数据时是否修改相应的数据块。

    METHOD, SYSTEM AND PROGRAM FOR FORMING A CONSISTENCY GROUP
    3.
    发明申请
    METHOD, SYSTEM AND PROGRAM FOR FORMING A CONSISTENCY GROUP 失效
    用于形成一致性组的方法,系统和程序

    公开(公告)号:US20070028065A1

    公开(公告)日:2007-02-01

    申请号:US11470612

    申请日:2006-09-06

    IPC分类号: G06F12/16

    摘要: Provided are a method, system, and program for forming a consistency group of data. Information is provided on a consistency group relationship indicating a plurality of slave controllers and, for each indicated slave controller, a slave storage unit managed by the slave controller. A command is transmitted to each slave controller in the consistency group relationship to cause each slave controller to transmit data in the slave storage unit to a remote storage in a manner that forms the consistency group. A determination is made as to whether all the slave controllers successfully transmitted the data in the slave storage units that is part of the consistency group to the remote storage.

    摘要翻译: 提供了用于形成一致性数据组的方法,系统和程序。 根据指示多个从控制器的一致性组关系提供信息,并且对于每个指示的从控制器,由从控制器管理的从存储单元提供信息。 以一致性组关系将命令发送到每个从控制器,以使每个从控制器以形成一致性组的方式将从属存储单元中的数据传输到远程存储器。 确定所有从属控制器是否成功地将作为一致性组的一部分的从属存储单元中的数据发送到远程存储器。

    Point in time copy between data storage systems
    8.
    发明申请
    Point in time copy between data storage systems 失效
    在数据存储系统之间的时间点复制

    公开(公告)号:US20050251634A1

    公开(公告)日:2005-11-10

    申请号:US10839034

    申请日:2004-05-05

    摘要: A target data storage system comprises a peer-to-peer communication link interface for linking the target to a source data storage system, and data storage for storing point in time copy data received from the source via the peer-to-peer communication link interface. Information is established at the target relating logical identification of the point in time copy data to point in time copy data stored at the target and to point in time copy data stored at the source, such that the information references the data storage system having requested point in time copy data. A controller of the target accesses requested point in time copy data at the target if the table indicates that the requested point in time copy data is available at the target; else obtains the requested point in time copy data from the source via the peer-to-peer communication link interface.

    摘要翻译: 目标数据存储系统包括用于将目标链接到源数据存储系统的点对点通信链路接口以及用于通过对等通信链路接口从源接收的时间点复制数据的数据存储器 。 在目标处建立信息,将时间点的复制数据的时间点的逻辑识别与存储在目标上的时间复制数据相关联,并将时间点复制存储在源中的数据,使得信息引用具有请求点的数据存储系统 及时复制数据。 如果该表指示所请求的时间点复制数据在目标上可用,则请求时间点的目标访问控制器复制数据在目标上; 否则通过对等通信链路接口从源中获得请求的时间点复制数据。

    SYSTEM, METHOD AND COMPUTER PROGRAM PRODUCT FOR GENERATING A CONSISTENT POINT IN TIME COPY OF DATA
    10.
    发明申请
    SYSTEM, METHOD AND COMPUTER PROGRAM PRODUCT FOR GENERATING A CONSISTENT POINT IN TIME COPY OF DATA 有权
    用于在时间复制数据中产生一致点的系统,方法和计算机程序产品

    公开(公告)号:US20080098187A1

    公开(公告)日:2008-04-24

    申请号:US11550621

    申请日:2006-10-18

    IPC分类号: G06F12/00

    摘要: A method for generating a consistent point in time copy of data, the method includes: selecting at least one selected data block to be copied from a source volume to a target volume in response to a request to generate a consistent point in time copy of multiple data blocks; waiting until the source volume is ready to send the at least one selected data block to a remote volume while queuing at least one data block modify request; de-queuing the at least one queued modify requests while copying the at least one selected data block from the source volume to the target volume; wherein the copying includes utilizing a first copying mechanism to copy a first selected data block if a request to modify the first selected block is de-queued before the first selected data block is copied to the target volume; else, the copying includes using a second copying mechanism that is slower than the first copying mechanism.

    摘要翻译: 一种用于产生数据的一致的时间点副本的方法,所述方法包括:响应于产生多个一致的时间点副本的请求,选择要从源卷复制到目标卷的至少一个所选择的数据块 数据块 等待直到源卷准备好在排队至少一个数据块修改请求时将所述至少一个所选择的数据块发送到远程卷; 在将所述至少一个所选择的数据块从所述源卷复制到所述目标卷时,将所述至少一个排队的修改请求排队; 其中所述复制包括利用第一复制机构来复制第一所选择的数据块,如果在所述第一所选数据块被复制到所述目标卷之前,如果修改所述第一所选块的请求被排队,则复制所述第一复制机制; 否则,复印包括使用比第一复印机构慢的第二复印机构。