公开(公告)号：US5734818A

公开(公告)日：1998-03-31

申请号：US644921

申请日：1996-05-10

申请人： Robert Frederic Kern ,  Ronald Maynard Kern ,  Gregory Edward McBride ,  William Frank Micka ,  Claus William Mikkelsen ,  David Michael Shackelford ,  Robert Wesley Shomler

发明人： Robert Frederic Kern ,  Ronald Maynard Kern ,  Gregory Edward McBride ,  William Frank Micka ,  Claus William Mikkelsen ,  David Michael Shackelford ,  Robert Wesley Shomler

IPC分类号： G06F3/06 ,  G06F11/14 ,  G06F11/20 ,  G06F12/00 ,  G06F12/16 ,  G06F13/00 ,  G11C29/00

CPC分类号： G06F11/2071 ,  G06F11/2064 ,  G11C29/74 ,  G06F11/1443 ,  G06F11/2074 ,  G06F2201/82

摘要： A remote data shadowing system provides storage based, real time disaster recovery capability. Record updates at a primary site cause write I/O operations in a storage subsystem therein. The write I/O operations are time stamped and the time, sequence, and physical locations of the record updates are collected in a primary data mover. The primary data mover groups sets of the record updates and associated control information based upon a predetermined time interval, the primary data mover appending a prefix header to the record(updates thereby forming self describing record sets. The self describing record sets are transmitted to a remote secondary site wherein consistency groups are formed such that the record updates are ordered so that the record updates can be shadowed in an order consistent with the order the record updates cause write I/O operations at the primary site.

摘要翻译： 远程数据阴影系统提供基于存储的实时灾难恢复功能。 在主站点记录更新会导致其中的存储子系统中的写入I / O操作。 写I / O操作是时间戳的，并且记录更新的时间，顺序和物理位置被收集在主数据移动器中。 主数据移动器基于预定时间间隔对记录更新和相关联的控制信息进行分组，主数据移动器向记录附加前缀标题（由此更新，从而形成自描述记录集，自描述记录集被发送到 远程辅助站点，其中形成一致性组，使得记录更新被排序，使得记录更新可以以与记录更新在主站点上写入I / O操作的顺序一致的顺序被遮蔽。

公开(公告)号：US5720029A

公开(公告)日：1998-02-17

申请号：US506490

申请日：1995-07-25

申请人： Robert Frederic Kern ,  William Frank Micka ,  Claus William Mikkelsen ,  Robert Wesley Shomler ,  Warren Keith Stanley ,  Richard Kent Treiber

发明人： Robert Frederic Kern ,  William Frank Micka ,  Claus William Mikkelsen ,  Robert Wesley Shomler ,  Warren Keith Stanley ,  Richard Kent Treiber

IPC分类号： G06F11/20 ,  G06F11/00

CPC分类号： G06F11/2074 ,  G06F11/2064

摘要： A disaster recovery system providing asynchronous remote data shadowing between a primary and a secondary site uses a pair of track arrays for each primary data storage device of a remote copy pair to monitor which record updates are in transit between the primary site and the secondary site. A host processor at the primary site of the disaster recovery system transfers a sequentially consistent order of copies of record updates to the secondary site for back-up purposes. The copied record updates are stored on the secondary data storage devices which form remote copy pairs with the primary data storage devices at the primary site. One track array, the active track array, is used to set elements according to which tracks on the primary data storage device receive record updates from the host processor at the primary site. The other track array, the recovery track array, designates which record updates comprise the copied record updates currently transferred from the primary site to the secondary site for data shadowing and is used for recovery should an error interrupt the transfer. The track arrays are toggled once the consistency group transfer completes, the recovery track array becoming the active track array and the active track array becoming the recovery track array.

摘要翻译： 在主站点和辅助站点之间提供异步远程数据镜像的灾难恢复系统使用远程副本对的每个主数据存储设备的一对轨道阵列来监视主站点和辅助站点之间传输的记录更新。 在灾难恢复系统的主站点处的主机处理器将记录更新的副本顺序传送到辅助站点以进行备份。 复制的记录更新存储在辅助数据存储设备上，其与主站点上的主数据存储设备形成远程副本对。 一个磁道阵列，主动磁道阵列，用于根据主数据存储设备的哪些磁道在主站点处从主机处理器接收记录更新来设置元素。 另一个轨道阵列（恢复轨道阵列）指定哪个记录更新包括当前从主站点传送到次站点的复制记录更新以用于数据阴影，并且如果错误中断传输，则用于恢复。 一旦一致性组传输完成，轨道阵列就会切换，恢复轨道阵列成为主动轨道阵列，而主动轨道阵列成为恢复轨道阵列。

公开(公告)号：USRE37038E1

公开(公告)日：2001-01-30

申请号：US08521600

申请日：1995-08-31

申请人： Lawrence E. Eastridge ,  Robert Frederic Kern ,  William Frank Micka ,  Claus William Mikkelsen ,  James Mitchell Ratliff

发明人： Lawrence E. Eastridge ,  Robert Frederic Kern ,  William Frank Micka ,  Claus William Mikkelsen ,  James Mitchell Ratliff

IPC分类号： H03K19003

CPC分类号： G06F11/1461 ,  Y10S707/99953

摘要： A method in a data processing system for automatically terminating or resuming backup copy sessions after an abnormal interrupt or reset notification occurrence during a backup copy process. A status indication is entered into activity tables associated with a plurality of storage subsystems and devices within a data processing system in response to initiation of a backup copy session. Status indications are then entered upon successful completion of a backup copy session within the data processing system. The indications within the activity tables are reviewed to determine the status of a backup copy session upon restarting a resource manager, abnormal termination of a backup copy program, or an operating system initial program load. If a backup copy session has been initiated but not completed, the backup copy session is then terminated. The indications within the activity tables are also reviewed to determine the status of a backup copy session if a reset notification is raised by a storage subsystem. The tracks extents which are active for a volume associated with a particular session identification are determined. A comparison is then made between the tracks extents which are active and the volume and extent information associated with a physical session identification. If a match exists between the tracks extents which are active and the volume and extent information associated with a physical session identification, the backup copy session resumes. If a match does not exist, the backup copy session is terminated.

摘要翻译： 数据处理系统中的方法，用于在备份复制过程中发生异常中断或复位通知后自动终止或恢复备份复制会话。 响应于启动备份复制会话，将状态指示输入到与数据处理系统内的多个存储子系统和设备相关联的活动表中。 然后在数据处理系统中成功完成备份复制会话后输入状态指示。 审查活动表中的指示以确定在重新启动资源管理器时备份副本会话的状态，备份副本程序的异常终止或操作系统初始程序加载。 如果备份副本会话已启动但尚未完成，则备份副本会话将被终止。 如果存储子系统引起重置通知，还会检查活动表中的指示，以确定备份副本会话的状态。 确定与特定会话标识相关联的卷活动的磁道扩展区。 然后进行有效的轨迹区域和与物理会话标识相关联的音量和范围信息之间的比较。 如果在活动的磁盘盘区和与物理会话标识相关的卷和扩展信息之间存在匹配，则恢复备份拷贝会话。 如果匹配不存在，则备份副本会话终止。

公开(公告)号：USRE37364E1

公开(公告)日：2001-09-11

申请号：US08521712

申请日：1995-08-31

申请人： Oded Cohn ,  Michael Howard Hartung ,  William Frank Micka ,  John Norbert McCauley, Jr. ,  Claus William Mikkelsen ,  Kenneth Michael Nagin ,  Yoram Novick ,  Alexander Winokur

发明人： Oded Cohn ,  Michael Howard Hartung ,  William Frank Micka ,  John Norbert McCauley, Jr. ,  Claus William Mikkelsen ,  Kenneth Michael Nagin ,  Yoram Novick ,  Alexander Winokur

IPC分类号： G06F1100

CPC分类号： G06F11/1466 ,  G06F11/1458 ,  G06F11/1461 ,  G06F11/1469

摘要： A method and system are disclosed for enhanced efficiency of backup copying of designated datasets stored within a plurality of storage devices coupled to the data processing system via a storage subsystem control unit having subsystem memory therein. Application execution within the data processing system is temporarily suspended long enough to form a dataset logical-to-physical system address concordance to be utilized to administer copying of the designated dataset. Thereafter, application initiated updates to uncopied portions of the designated datasets are temporarily deferred until sidefiles of the affected portions of the designated datasets are written to subsystem memory. The updates are then written to the storage subsystem. Portions of the designated datasets are then accessed and copied from the storage subsystem on a scheduled or opportunistic basis utilizing selected data retrieval command sequences. A sidefile status query is appended to selected data retrieval command sequences and the presence of data within the subsystem memory is determined without the necessity of additional communications between the data processing system and the storage subsystem. The sidefiles are then accessed and copied. Copied portions of the designated datasets and sidefiles are then copied to alternate storage locations in a backup copy order defined by the address concordance.

摘要翻译： 公开了一种方法和系统，用于通过其中具有子系统存储器的存储子系统控制单元提高存储在与数据处理系统耦合的多个存储设备中的指定数据集的备份复制效率。 数据处理系统内的应用程序执行暂时被暂停，以形成用于管理指定数据集复制的数据集逻辑到物理系统地址一致性。 此后，临时延迟对指定数据集的未封闭部分的应用发起的更新，直到指定数据集的受影响部分的副文件被写入子系统存储器。 然后将更新写入存储子系统。 然后使用所选择的数据检索命令序列，以预定的或机会的方式从存储子系统访问和复制指定数据集的一部分。 辅助文件状态查询被附加到所选择的数据检索命令序列，并确定子系统存储器内的数据的存在，而不需要数据处理系统和存储子系统之间的附加通信。 然后访问和复制文件。 指定数据集和副文件的复制部分然后以地址一致性定义的备份复制顺序复制到备用存储位置。

公开(公告)号：US06789178B2

公开(公告)日：2004-09-07

申请号：US10396971

申请日：2003-03-24

申请人： Claus William Mikkelsen ,  William David Davenport ,  Michael John Dutch ,  Cynthia Anne Martinage ,  Richard Allan Ruehle

发明人： Claus William Mikkelsen ,  William David Davenport ,  Michael John Dutch ,  Cynthia Anne Martinage ,  Richard Allan Ruehle

IPC分类号： G06F1200

CPC分类号： G06F11/2074 ,  G06F11/2064 ,  G06F11/2082 ,  Y10S707/99953 ,  Y10S707/99955

摘要： In a computer system, the controller of one or more primary data recording devices sends update information to the controller of one or more secondary data recording devices to maintain a remote copy of data stored on the primary data recording devices. The primary controller receives a command from a computer that specifies a prospective suspend time after which remote copy operation is to be suspended. After the suspend time passes, the primary controller stops sending the update information to the secondary controller and begins storing indicators of the updated information in cache memory. The primary controller may resume remote copy operation in response to a command received from the computer by first entering into a pending mode of operation in which cached indicators are used to identify update information that must be sent to the secondary controller to resynchronize the remote copy. When the information for all cached indicators has been sent, normal remote copy operation may be resumed.

摘要翻译： 在计算机系统中，一个或多个主要数据记录装置的控制器将更新信息发送到一个或多个次要数据记录装置的控制器，以维持存储在主数据记录装置上的数据的远程副本。 主控制器接收来自计算机的命令，该命令指定将暂停远程复制操作的预期挂起时间。 暂停时间过后，主控制器停止向二级控制器发送更新信息，并开始将更新信息的指示符存储在高速缓冲存储器中。 主控制器可以响应于从计算机接收到的命令来恢复远程复制操作，首先进入待处理的操作模式，其中使用缓存的指示符来标识必须发送到辅助控制器的更新信息以重新同步远程复制。 当所有缓存指示符的信息已发送时，可以恢复正常的远程复制操作。

公开(公告)号：US06539462B1

公开(公告)日：2003-03-25

申请号：US09352549

申请日：1999-07-12

申请人： Claus William Mikkelsen ,  William David Davenport ,  Michael John Dutch ,  Cynthia Anne Martinage ,  Richard Allan Ruehle

发明人： Claus William Mikkelsen ,  William David Davenport ,  Michael John Dutch ,  Cynthia Anne Martinage ,  Richard Allan Ruehle

IPC分类号： G06F1200

CPC分类号： G06F11/2074 ,  G06F11/2064 ,  G06F11/2082 ,  Y10S707/99953 ,  Y10S707/99955

摘要： In a computer system, the controller of one or more primary data recording devices sends update information to the controller of one or more secondary data recording devices to maintain a remote copy of data stored on the primary data recording devices. The primary controller receives a command from a computer that specifies a prospective suspend time after which remote copy operation is to be suspended. After the suspend time passes, the primary controller stops sending the update information to the secondary controller and begins storing indicators of the updated information in cache memory. The primary controller may resume remote copy operation in response to a command received from the computer by first entering into a pending mode of operation in which cached indicators are used to identify update information that must be sent to the secondary controller to resynchronize the remote copy. When the information for all cached indicators has been sent, normal remote copy operation may be resumed.