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    • 5. 发明授权
    • Data storage system with outboard physical data transfer operation utilizing data path distinct from host
    • 数据存储系统利用与主机不同的数据路径进行外部物理数据传输操作
    • US06202124B1
    • 2001-03-13
    • US09073375
    • 1998-05-05
    • Robert Frederic KernRonald Maynard KernWilliam Frank MickaMark Anthony Sovik
    • Robert Frederic KernRonald Maynard KernWilliam Frank MickaMark Anthony Sovik
    • G06F1200
    • G06F3/0619G06F3/065G06F3/0689
    • A data storage system includes an outboard data transfer module that directs data transfer operations without requiring substantial host involvement. This subsystem includes a host computer, one or more digital data storage devices, one or more device controllers interposed between the host computer and the storage devices, and a outboard data manager coupled to the host and the device controllers. Data transfer operations are initiated when the outboard data manager receives a data transfer request from the host. The request identifies the type of operation, resulting target format, source data residing on one or more source devices, and one or more target devices. In response to this request, the outboard data manager retrieves a copy of the source data from the source device(s), formats target data according to host instruction, and then transmits the copy to the target device(s) for storage therein. Thus, source data is copied from source to target storage device(s) via the outboard data manager without burdening the host by routing data through it. Some exemplary data transfer operations include copy, migrate, recall, backup, restore, move, defragment, reorganize, and the like.
    • 数据存储系统包括外部数据传输模块,其指导数据传送操作,而不需要大量的主机参与。 该子系统包括主计算机,一个或多个数字数据存储设备,插入在主计算机和存储设备之间的一个或多个设备控制器,以及耦合到主机和设备控制器的外部数据管理器。 当外部数据管理器从主机接收到数据传输请求时,启动数据传输操作。 请求标识操作的类型,结果目标格式,驻留在一个或多个源设备上的源数据以及一个或多个目标设备。 响应于该请求,外部数据管理器从源设备检索源数据的副本,根据主机指令格式化目标数据,然后将该副本发送到目标设备以存储在其中。 因此,源数据通过外部数据管理器从源复制到目标存储设备,而不会通过路由数据来负担主机。 一些示例性数据传输操作包括复制,迁移,调用,备份,恢复,移动,碎片整理,重组等。
    • 6. 发明授权
    • Coordinating remote copy status changes across multiple logical sessions to maintain consistency
    • 协调跨多个逻辑会话的远程复制状态更改以保持一致性
    • US06484187B1
    • 2002-11-19
    • US09560864
    • 2000-04-28
    • Ronald Maynard KernGregory Edward McBrideDavid Michael Shackelford
    • Ronald Maynard KernGregory Edward McBrideDavid Michael Shackelford
    • G06F1730
    • G06F17/30353G06F17/30371Y10S707/99952Y10S707/99955
    • A multi-session data storage facility coordinates similar status changes across all sessions at appropriate times. In each session, a data mover implements data mirroring by copying updates from the primary storage to the secondary storage. A master data set, accessible by all sessions, includes a common area for posting commands and/or errors to all sessions and individual session areas for posting errors occurring in particular sessions. When a data mover receives a host initiated command, this data mover becomes a “master.” Initially, the master data mover lists the command in the master data set's common area. Whenever other, “slave” data movers notice a command in the master data set's common area, they respond by suspending their formation of consistency groups and responding with a “ready” message. The “ready” message comprises the slave data mover's consistency form time (i.e., the earliest of most-recent update time from all controllers in that session). Accordingly, after posting the command, the master data mover reviews the slave data movers' responses. If these responses indicate all sessions can execute the command at a requested consistent time, then the master data mover instructs the slave data movers to execute the command by entering an execute instruction in the master data set's common area. Otherwise, the master data mover enters a cancel operation in the master data set's common area.
    • 多会话数据存储设施在适当的时间协调所有会话的类似状态更改。 在每个会话中,数据移动器通过将更新从主存储复制到辅助存储来实现数据镜像。 所有会话可访问的主数据集包括用于向所有会话和单个会话区域发布命令和/或错误的公共区域,用于发布特定会话中发生的错误。 当数据移动设备接收到主机发起的命令时,该数据移动设备成为“主机”。 最初,主数据移动器列出了主数据集的公共区域中的命令。 每当其他“从属”数据移动器在主数据集的公共区域中注意到一个命令时,它们将通过暂停其一致性组的形成并通过“准备”消息进行响应。 “就绪”消息包括从属数据移动器的一致性形式时间(即,从该会话中的所有控制器的最新更新时间的最早)。 因此,在发布命令之后,主数据移动器审查从属数据移动器的响应。 如果这些响应指示所有会话可以在所请求的一致时间内执行命令,则主数据移动器指示从数据移动器通过在主数据集的公共区域中输入执行指令来执行命令。 否则,主数据移动器在主数据集的公共区域中输入取消操作。
    • 7. 发明授权
    • Method, system and program for maintaining data consistency among updates across groups of storage areas using update times
    • 方法,系统和程序,用于使用更新时间维护存储区域组之间的更新之间的数据一致性
    • US06463501B1
    • 2002-10-08
    • US09422595
    • 1999-10-21
    • Ronald Maynard KernGregory Edward McBrideDavid Michael Shackelford
    • Ronald Maynard KernGregory Edward McBrideDavid Michael Shackelford
    • G06F1216
    • G06F11/2082G06F11/1471G06F11/2058G06F2201/82Y10S707/99952Y10S707/99953
    • A system, method, and program for maintaining data consistency among updates to data storage areas are provided. Each update has an update time the update was made. There are multiple groups of data storage areas. For each group, updates to the data storage area in the group are stored in a journal for storing updates to the group, wherein there are multiple journals. An indication is made in a memory area for each group of a group update time comprising a most recent update time of the updates in the group. The update time for each update in the group is not greater than the group update time. A determination is made of a minimum group update time across all the groups. At least one update is applied to storage if the update time for the update does not exceed the minimum group update time. The data storage areas may be partitioned among a plurality of computer systems, and may be maintained in at least one primary and secondary storage. The data storage areas may also comprise volumes, with each group including at least one volume. The groups of updates may also be maintained in a journal.
    • 提供了一种用于在数据存储区域的更新之间维持数据一致性的系统,方法和程序。 每个更新都有更新的更新时间。 有多组数据存储区域。 对于每个组,组中数据存储区域的更新存储在用于存储组更新的日志中,其中存在多个日志。 在组的更新时间的每个组的存储区域中进行指示,其中包括组中更新的最新更新时间。 组中每个更新的更新时间不大于组更新时间。 确定所有组中的最小组更新时间。 如果更新的更新时间不超过最小组更新时间,则至少将一个更新应用于存储。 数据存储区域可以在多个计算机系统之间分区,并且可以被维护在至少一个主存储器和次存储器中。 数据存储区域还可以包括卷,每个组包括至少一个卷。 这些更新组也可以保存在日志中。
    • 8. 发明授权
    • Management of fixed pages in memory for input/output operations
    • 管理内存中固定页面的输入/输出操作
    • US06260129B1
    • 2001-07-10
    • US09149052
    • 1998-09-08
    • Robert Nelson CrockettRonald Maynard KernGregory Edward McBrideDavid Michael ShackelfordStephen Charles West
    • Robert Nelson CrockettRonald Maynard KernGregory Edward McBrideDavid Michael ShackelfordStephen Charles West
    • G06F1200
    • G06F12/126
    • Disclosed is a system for managing pages in a volatile memory device for data transfer operations between a first storage area and a second storage area. The first storage area is queried to determine a number of data sets to include in a data transfer operation. A number of pages in the volatile memory device needed for the data transfer operation is then determined. A determination is then made as to whether the number of pages needed for the data transfer operation is greater than available fixed pages in a pool of pages. Available fixed pages in the pool are allocated to the data transfer operation after determining that the number of pages needed to process the data transfer operation is less than or equal to the available fixed pages in the pool. Alternatively, after determining that the number of pages needed to process the data transfer operation is greater than the available fixed pages in the pool, all the fixed pages in the pool and additional fixed pages are allocated to the data transfer operation.
    • 公开了一种用于管理易失性存储器装置中的页面的系统,用于在第一存储区域和第二存储区域之间进行数据传送操作。 查询第一个存储区域以确定要包括在数据传输操作中的多个数据集。 然后确定数据传输操作所需的易失性存储器件中的页数。 然后确定数据传输操作所需的页数是否大于页面池中的可用固定页面。 在确定处理数据传输操作所需的页数小于或等于池中可用的固定页面之后,将池中的可用固定页面分配给数据传输操作。 或者,在确定处理数据传输操作所需的页面数量大于池中可用的固定页面之后,池中的所有固定页面和附加固定页面被分配给数据传送操作。
    • 9. 发明授权
    • Adaptive multitasking for dataset storage
    • 用于数据集存储的自适应多任务
    • US5778393A
    • 1998-07-07
    • US650606
    • 1996-05-20
    • Donald Reynold BleaRonald Maynard KernGregory Edward McBrideDavid Michael Shackelford
    • Donald Reynold BleaRonald Maynard KernGregory Edward McBrideDavid Michael Shackelford
    • G06F3/06G06F11/20G06F17/30
    • G06F11/2082G06F3/0614G06F3/0632G06F3/0689G06F11/2064Y10S707/99956
    • Data is stored in one or more data storage devices, the number of active data storage devices being adaptively adjusted to maximize parallelism while minimizing device overhead. Multiple datasets are first received, these being designated for storage in multiple data storage devices. Next, a first one of the received datasets is stored in a first one of the data storage devices. Concurrently with storage of the first dataset, the following steps are performed: (1) selecting a second received dataset from those remaining to be stored, (2) selecting an available data storage device by employing a predetermined criteria, and (3) beginning storage of the second dataset in the selected data storage device. The predetermined criteria for selecting an available data storage device may involve, for example, selecting an available device based on a "first fit" or a "best fit" scheme. Concurrently with storage of the second dataset, storage of a third dataset starts. Likewise, the process of storing each subsequent dataset commences while the previous dataset is being stored. This technique promotes efficiency, since later-received datasets may be stored in previously used storage devices that have already finished storing earlier datasets. Accordingly, less processing overhead is occupied in activating previously dormant data storage devices.
    • 数据存储在一个或多个数据存储设备中,活动数据存储设备的数量被自适应地调整以最大化并行性,同时最小化设备开销。 首先接收多个数据集,这些数据集被指定用于存储在多个数据存储设备中。 接下来,接收的数据集中的第一个被存储在第一个数据存储装置中。 同时存储第一数据集,执行以下步骤:(1)从剩余的数据集中选择第二个接收到的数据集,(2)通过采用预定准则选择可用数据存储设备;(3)开始存储 的所选数据存储设备中的第二数据集。 用于选择可用数据存储设备的预定标准可以涉及例如基于“第一拟合”或“最佳拟合”方案来选择可用设备。 同时存储第二个数据集,第三个数据集的存储开始。 同样,存储每个后续数据集的过程在存储上一个数据集时开始。 这种技术可以提高效率,因为稍后接收的数据集可能存储在已经完成存储早期数据集的先前使用的存储设备中。 因此,在激活先前的休眠数据存储设备中占用较少的处理开销。