公开(公告)号：US5379398A

公开(公告)日：1995-01-03

申请号：US871247

申请日：1992-04-20

申请人： Oded Cohn ,  Michael H. Hartung ,  John N. McCauley, Jr. ,  William F. Micka ,  Claus W. Mikkelsen ,  Kenneth M. Nagin ,  Yoram Novick ,  Alexander Winokur

发明人： Oded Cohn ,  Michael H. Hartung ,  John N. McCauley, Jr. ,  William F. Micka ,  Claus W. Mikkelsen ,  Kenneth M. Nagin ,  Yoram Novick ,  Alexander Winokur

IPC分类号： G06F12/00 ,  G06F11/14 ,  G06F12/02 ,  G06F12/16

CPC分类号： G06F11/1466

摘要： A method and system are disclosed for permitting high concurrency of access during backup copying of designated data stored within a storage subsystem which includes multiple storage devices coupled to the data processing system via a storage subsystem control unit having subsystem memory therein. Data within each storage device is accessed utilizing a Unique Control Block (UCB), which identifies a selected storage device, and an associated data retrieval command sequence which identifies the data to be accessed. Portions of the data copied to subsystem memory within the subsystem storage control unit as sidefiles from a first storage device may be accessed utilizing a Unique Control Block (UCB) associated with an alternate storage device by associating a selected data retrieval command sequence therewith which identifies the data as stored within the subsystem memory. In this manner, data from a first storage device may be accessed utilizing an alternate Unique Control Block (UCB), permitting concurrent access of data utilizing the Unique Control Block (UCB) associated with the first storage device.

摘要翻译： 公开了一种方法和系统，用于在备份复制存储在存储子系统内的指定数据的同时进行访问的高并发性，该存储子系统包括经由其中具有子系统存储器的存储子系统控制单元耦合到数据处理系统的多个存储设备。 使用识别所选存储设备的唯一控制块（UCB）和识别要访问的数据的相关联的数据检索命令序列来访问每个存储设备内的数据。 可以利用与替代存储设备相关联的唯一控制块（UCB）来访问从子系统存储控制单元中复制到子系统存储控制单元中的子系统存储器的部分作为来自第一存储设备的副文件，通过将所选择的数据检索命令序列与其相关联来识别标识 存储在子系统存储器中的数据。 以这种方式，可以使用替代的唯一控制块（UCB）来访问来自第一存储设备的数据，允许使用与第一存储设备相关联的唯一控制块（UCB）并行访问数据。

公开(公告)号：US5241669A

公开(公告)日：1993-08-31

申请号：US871786

申请日：1992-04-20

申请人： Oded Cohn ,  Michael H. Hartung ,  William F. Micka ,  John N. McCauley, Jr. ,  Claus W. Mikkelsen ,  Kenneth M. Nagin

发明人： Oded Cohn ,  Michael H. Hartung ,  William F. Micka ,  John N. McCauley, Jr. ,  Claus W. Mikkelsen ,  Kenneth M. Nagin

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

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.

公开(公告)号：US5615329A

公开(公告)日：1997-03-25

申请号：US199448

申请日：1994-02-22

申请人： Robert F. Kern ,  William F. Micka ,  Claus W. Mikkelsen ,  Michael A. Paulsen ,  Robert W. Shomler

发明人： Robert F. Kern ,  William F. Micka ,  Claus W. Mikkelsen ,  Michael A. Paulsen ,  Robert W. Shomler

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

CPC分类号： G06F11/2082 ,  G06F11/2064 ,  G11C29/74

摘要： A remote data shadowing system provides synchronous, storage based, real time disaster recovery wherein a secondary site is located remote from the primary site. An error recovery program at the primary site quiesces applications running thereat for performing error recovery procedures and signalling both primary and secondary locations that failed duplex has occurred. The error recovery program determines the cause of failed duplex, and if error recovery is successful, duplex mode is resumed. If the error recovery program is unable to perform error recovery successfully, then further write updates at the primary site are prohibited and an error message is communicated to operators at both the primary and secondary sites.

摘要翻译： 远程数据阴影系统提供同步，基于存储的实时灾难恢复，其中辅助站点位于远离主站点的位置。 主站点的错误恢复程序会停止运行该应用程序的应用程序，以执行错误恢复过程，并发信号通知发生双工故障的主站点和辅助位置。 错误恢复程序确定双工故障的原因，如果错误恢复成功，则恢复双工模式。 如果错误恢复程序无法成功执行错误恢复，则禁止在主站点进一步写入更新，并向主站点和辅助站点上的运营商发送错误消息。

公开(公告)号：US5577222A

公开(公告)日：1996-11-19

申请号：US992219

申请日：1992-12-17

申请人： William F. Micka ,  Claus W. Mikkelsen ,  Robert W. Shomler

发明人： William F. Micka ,  Claus W. Mikkelsen ,  Robert W. Shomler

IPC分类号： G06F12/16 ,  G06F11/20 ,  G06F13/00

CPC分类号： G06F11/2074 ,  G06F11/2064 ,  Y10S707/99931

摘要： A system for asynchronously duplexing direct access storage device (DASD) data in a plurality of DASD subsystems has the advantage of decoupling the data duplexing operation from the DASD write I/O operation. This ensures the write does not incur unnecessary wait states in the subsystem. By establishing a sequence checkpoint at which time a set of information packets are grouped together and processed as a single sequence unit, this decoupling and independent operation takes place. Through this independence, data copying to a secondary location can take place without affecting the performance of the subsystems and also not affecting the corresponding integrity of the data that is being updated.

摘要翻译： 用于在多个DASD子系统中异步双工直接访问存储设备（DASD）数据的系统具有将数据双工操作与DASD写入I / O操作分离的优点。 这确保写入不会在子系统中引起不必要的等待状态。 通过建立一个序列检查点，此时一组信息包被分组在一起并作为单个序列单元处理，这种解耦和独立操作发生。 通过这种独立性，数据复制可以发生到次要位置，而不影响子系统的性能，也不影响正在更新的数据的相应完整性。

公开(公告)号：US5592618A

公开(公告)日：1997-01-07

申请号：US317632

申请日：1994-10-03

申请人： William F. Micka ,  Claus W. Mikkelsen ,  Robert W. Shomler ,  May N. Wone

发明人： William F. Micka ,  Claus W. Mikkelsen ,  Robert W. Shomler ,  May N. Wone

IPC分类号： G06F11/16 ,  G06F11/20 ,  G11C29/00 ,  G06F11/00

CPC分类号： G06F11/2074 ,  G11C29/74 ,  G06F11/1612

摘要： A data copy validation technique compares primary data to a copy of that data by generating check codes of the data to be validated at both primary and secondary sites in a continuously running remote data shadowing system. The validation session runs concurrently with the data shadowing so as not to disrupt the data shadowing. Each data validation session is assigned a copy start time, for example, a time preceding a time of a consistency group, for defining when the check code for data at the primary should be compared to a check code of the data at the secondary. The check code of the data at the secondary site is taken at a time that is the equivalent logical point-in-time of that data at the primary site even though the respective data contents may be different in real time.

摘要翻译： 数据复制验证技术通过在连续运行的远程数据阴影系统中生成在主站点和次站点上要验证的数据的检查代码来将主数据与该数据的副本进行比较。 验证会话与数据阴影同时运行，以免中断数据阴影。 为每个数据验证会话分配一个复制开始时间，例如，一致性组时间之前的时间，用于定义何时应将主数据的校验码与次要数据的校验码进行比较。 在辅助站点处的数据的检查码是在主站点处的该数据的等效逻辑时间点的时间，即使相应的数据内容可能实时地不同。

公开(公告)号：US5241668A

公开(公告)日：1993-08-31

申请号：US871363

申请日：1992-04-20

申请人： Lawrence E. Eastridge ,  Robert F. Kern ,  William F. Micka ,  Claus W. Mikkelsen ,  James M. Ratliff

发明人： Lawrence E. Eastridge ,  Robert F. Kern ,  William F. Micka ,  Claus W. Mikkelsen ,  James M. Ratliff

IPC分类号： G06F12/00 ,  G06F11/14

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：US5241670A

公开(公告)日：1993-08-31

申请号：US871787

申请日：1992-04-20

申请人： Lawrence E. Eastridge ,  Robert F. Kern ,  Ronald M. Kern ,  Claus W. Mikkelsen ,  James M. Ratliff

发明人： Lawrence E. Eastridge ,  Robert F. Kern ,  Ronald M. Kern ,  Claus W. Mikkelsen ,  James M. Ratliff

IPC分类号： G06F3/06 ,  G06F11/14

CPC分类号： G06F11/1466 ,  G06F3/0601 ,  G06F2003/0697

摘要： A method in a data processing system for generating a backup copy of designated datasets during concurrent execution of an application. Upon receiving a request for a backup copy, execution of an application is suspended. A dataset logical-to-physical storage system address concordance for the designated datasets is formed, and execution of the application is resumed thereafter. A resource manager is established to manage all input and output functions between storage subsystems, storage subsystem memory associated with each of the storage subsystems, and a temporary host memory during formation of the backup copy. Formation of the backup copy is accomplished on a scheduled or opportunistic basis by copying the designated datasets from the storage subsystems and then updating the address concordance in response to the copying. Application updates are processed during formation of the backup copy by buffering the updates, copying the affected uncopied designated datasets to a storage subsystem memory, updating the address concordance in response to the copying, and processing the updates. Designated datasets can also be copied to the temporary host memory in the event the number of designated datasets in the storage subsystem memory exceeds a threshold number. Finally, the designated datasets are copied to an alternate storage memory from the storage subsystem, storage subsystem memory and temporary host memory utilizing the resource manager and the altered address concordance to create a specified order backup copy of the designated datasets from said copied portions of the designated datasets without user intervention.

摘要翻译： 数据处理系统中的方法，用于在并发执行应用程序期间生成指定数据集的备份副本。 在接收到备份副本的请求时，应用程序的执行被暂停。 形成数据集逻辑到物理存储系统地址指定数据集的一致性，此后应用程序的执行恢复。 建立资源管理器来管理存储子系统之间的所有输入和输出功能，与每个存储子系统相关联的存储子系统存储器以及在形成备份副本期间的临时主机存储器。 通过从存储子系统复制指定的数据集，然后根据复制更新地址一致性，以预定的或机会的方式来形成备份副本。 通过缓存更新，将受影响的未被覆盖的指定数据集复制到存储子系统存储器，响应于复制更新地址一致性以及处理更新来处理在形成备份副本期间的应用程序更新。 如果存储子系统内存中的指定数据集的数量超过阈值数，则指定的数据集也可以复制到临时主机内存。 最后，使用资源管理器和改变的地址一致性将指定的数据集从存储子系统，存储子系统存储器和临时主机存储器复制到备用存储存储器，以从所述复制的部分中创建指定数据集的指定订单备份副本 指定的数据集，无需用户干预。