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    Asynchronous mirror consistency audit
    1.
    发明授权
    Asynchronous mirror consistency audit 有权

    公开(公告)号：US10169134B2

    公开(公告)日：2019-01-01

    申请号：US15411982

    申请日：2017-01-21

    Applicant: International Business Machines Corporation

    Inventor： Gregory E. McBride ,  David C. Reed ,  Warren K. Stanley

    IPC: G06F11/00 ,  G06F11/07 ,  G06F3/06 ,  G06F11/20

    Abstract: A method for auditing data consistency in an asynchronous data replication environment is disclosed. In one embodiment, such a method includes copying, at a primary storage system, a primary data track and recording a time that the primary data track was copied. The method replicates the primary data track and associated time from the primary storage system to a secondary storage system. The method applies, to a corresponding secondary data track at the secondary storage system, all updates received for the secondary data track that have a timestamp prior to the time. The method then reads the secondary data track at the secondary storage system after the updates have been applied, and compares the secondary data track to the primary data track. If the secondary data track does not match the primary data track, the method records an error. A corresponding system and computer program product are also disclosed.

    Data recovery in multi-target data storage networks
    3.
    发明授权
    Data recovery in multi-target data storage networks 有权

    公开(公告)号：US10042727B2

    公开(公告)日：2018-08-07

    申请号：US15842765

    申请日：2017-12-14

    Applicant: International Business Machines Corporation

    Inventor： David R. Blea ,  Theresa M. Brown ,  Gregory E. McBride ,  Carol S. Mellgren ,  Warren K. Stanley ,  Matthew J. Ward

    IPC: G06F11/20

    Abstract: A computer-implemented method according to one embodiment includes receiving indication of a failure event at a primary location having a primary data storage volume. In response to receiving the indication of the failure event, data is restored in a secondary data storage volume located at a secondary location remote from the primary location. The restored data is copied to a supplemental data storage volume. A first set of data updates intended for the primary data storage volume are tracked using the supplemental data storage volume. A second set of data updates performed at the secondary data storage volume are tracked. The second set of tracked data updates is merged with the first set of tracked data updates and transitioned to the primary data storage volume in response to the primary data storage volume becoming available. An instruction is sent to resume data updates at the primary data storage volume.

    Local locking in a bi-directional synchronous mirroring environment
    6.
    发明授权
    Local locking in a bi-directional synchronous mirroring environment 有权
    本地锁定在双向同步镜像环境中

    公开(公告)号：US09262344B2

    公开(公告)日：2016-02-16

    申请号：US14109645

    申请日：2013-12-17

    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION

    Inventor： Theresa M. Brown ,  Nicolas M. Clayton ,  Theodore T. Harris, Jr. ,  Gregory E. McBride ,  Carol S. Mellgren ,  Warren K. Stanley

    IPC: G06F12/00 ,  G06F12/14

    CPC classification number: G06F12/1466 ,  G06F12/0866 ,  G06F2212/222

    Abstract: Provided are techniques for local locking in a bi-directional synchronous mirroring environment. In response to receiving a write operation for a block of data on a first volume, a lock is obtained on a corresponding block of data on a second volume to obtain exclusive access to that block of data on the second volume. in response to determining that an active write indicator is set to indicate that there is not an active write on the second volume, updated data for the corresponding block of data is written to cache for the second volume, the lock is released to remove exclusive access to the corresponding block of data on the second volume, and a transfer complete message is sent to the first volume.

    Abstract translation: 提供了用于双向同步镜像环境中的本地锁定的技术。 响应于接收对第一卷上的数据块的写入操作，在第二卷上的相应数据块上获得锁以获得对该第二卷上的该数据块的独占访问。 响应于确定活动写指示符被设置为指示在第二卷上没有活动写入，用于相应数据块的更新数据被写入用于第二卷的高速缓存，则释放锁以去除专用访问 到第二卷上的对应的数据块，并且传送完成消息被发送到第一卷。

    POLICY-BASED MANAGEMENT OF STORAGE FUNCTIONS IN DATA REPLICATION ENVIRONMENTS
    7.
    发明申请
    POLICY-BASED MANAGEMENT OF STORAGE FUNCTIONS IN DATA REPLICATION ENVIRONMENTS 有权
    数据复制环境中存储功能的政策管理

    公开(公告)号：US20150156263A1

    公开(公告)日：2015-06-04

    申请号：US14616669

    申请日：2015-02-07

    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION

    Inventor： Nicolas M. Clayton ,  Lisa J. Gundy ,  John R. Paveza ,  Beth A. Peterson ,  Alfred E. Sanchez ,  David M. Shackelford ,  Warren K. Stanley ,  John G. Thompson

    IPC: H04L29/08 ,  H04L12/26

    CPC classification number: H04L67/1095 ,  G06F11/1456 ,  G06F11/2071 ,  G06F11/3034 ,  G06F11/3051 ,  G06F17/30873 ,  G06F2201/82 ,  H04L43/08 ,  H04L67/1097

    Abstract: A method for managing storage functions in a data replication environment is disclosed. In one embodiment, such a method includes continually monitoring for changes to a storage configuration at a secondary site. Upon detecting changes to the storage configuration at the secondary site, the method transmits remote metadata describing the changes to the primary site and stores the remote metadata at the primary site. The method then initiates a storage management function at the primary site which is mirrored to the secondary site. In order to perform the storage management function, the method reads the remote metadata at the primary site to determine the storage configuration at the secondary site. The method then performs the storage management function at the primary site in a way that takes into account the storage configuration at the secondary site. A corresponding apparatus, system, and computer-readable medium are also disclosed and claimed herein.

    Abstract translation: 公开了一种在数据复制环境中管理存储功能的方法。 在一个实施例中，这种方法包括连续监视辅助站点处的存储配置的变化。 在检测到次要站点上的存储配置的更改后，该方法将描述更改的远程元数据传送到主站点，并将远程元数据存储在主站点。 然后该方法在主站点启动镜像到辅助站点的存储管理功能。 为了执行存储管理功能，该方法读取主站点的远程元数据，以确定辅助站点的存储配置。 该方法然后以考虑到辅助站点上的存储配置的方式在主站点执行存储管理功能。 本文还公开并要求对应的装置，系统和计算机可读介质。

    DYNAMICALLY ADJUSTING WRITE PACING
    8.
    发明申请
    DYNAMICALLY ADJUSTING WRITE PACING 有权
    动态调整写入

    公开(公告)号：US20150074363A1

    公开(公告)日：2015-03-12

    申请号：US14024240

    申请日：2013-09-11

    Applicant: International Business Machines Corporation

    Inventor： Eduard A. Diel ,  Matthew J. Kalos ,  Alan G. McClure ,  Carol S. Mellgren ,  Alfred E. Sanchez ,  David M. Shackelford ,  Warren K. Stanley

    IPC: G06F3/06 ,  G06F12/08

    CPC classification number: G06F3/065 ,  G06F3/0604 ,  G06F3/061 ,  G06F3/0634 ,  G06F3/0659 ,  G06F3/067 ,  G06F3/0683 ,  G06F3/0689 ,  G06F12/0802

    Abstract: For dynamically adjusting write pacing, a calculation module calculates an interval as a maximum threshold for a primary volume divided by a first maximum pacing level for a first importance level. The calculation module further calculates a first pacing level as a number of record sets that have not been mirrored to a secondary volume divided by the interval. The first pacing level is set to the first maximum pacing level if the first pacing level is greater than the first maximum pacing level. The calculation module also selects a first pacing delay associated with the first pacing level from a delay table. A pacing module delays writes for a first channel command word writing to the primary volume by the first pacing delay.

    Abstract translation: 为了动态调整写入起搏，计算模块将间隔计算为主卷的最大阈值除以第一重要度级别的第一最大起搏等级。 计算模块还将第一起搏电平计算为未被镜像到辅助卷的记录集的数量除以间隔。 如果第一个起搏电平大于第一个最大起搏电平，则第一个起搏电平设置为第一个最大起搏电平。 计算模块还从延迟表中选择与第一起搏电平相关联的第一起搏延迟。 起搏模块延迟写入第一个通道命令字通过第一个起搏延迟写入主卷。

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