公开(公告)号：US20070168707A1

公开(公告)日：2007-07-19

申请号：US11297126

申请日：2005-12-07

申请人： Robert Kern ,  Kenneth Boyd ,  William Micka ,  Gregory McBride ,  John Flynn ,  John Wolfgang ,  Michael Factor ,  Amiram Hayardeny ,  Kenneth Day ,  Aviad Zlotnick

发明人： Robert Kern ,  Kenneth Boyd ,  William Micka ,  Gregory McBride ,  John Flynn ,  John Wolfgang ,  Michael Factor ,  Amiram Hayardeny ,  Kenneth Day ,  Aviad Zlotnick

IPC分类号： G06F11/00

CPC分类号： G06F11/1435 ,  G06F11/1471 ,  G06F2201/84

摘要： Provided are a method, system, and article of manufacture wherein a command is received for writing data to a first storage location. A determination is made that previously written data is stored in the first storage location. The previously written data is copied to a second storage location, in response to determining that the previously written data is stored in the first storage location. The data is written to the first storage location, in response to copying the previously written data to the second storage location.

摘要翻译： 提供了一种方法，系统和制品，其中接收到用于向第一存储位置写入数据的命令。 确定先前写入的数据被存储在第一存储位置。 响应于确定先前写入的数据被存储在第一存储位置，先前写入的数据被复制到第二存储位置。 响应于将先前写入的数据复制到第二存储位置，数据被写入到第一存储位置。

公开(公告)号：US20050010732A1

公开(公告)日：2005-01-13

申请号：US10618242

申请日：2003-07-11

申请人： Kenneth Boyd ,  Kenneth Day ,  Philip Dudas ,  William Micka ,  John Wolfgang

发明人： Kenneth Boyd ,  Kenneth Day ,  Philip Dudas ,  William Micka ,  John Wolfgang

IPC分类号： G06F11/20 ,  G06F12/16 ,  H04L29/08

CPC分类号： G06F11/2064 ,  G06F11/2074 ,  H04L67/1095 ,  Y10S707/99953 ,  Y10S707/99955

摘要： Disclosed are a system, a method, and a computer program product to efficiently create consistent transaction sets to maintain one or more copies of data at different data storage sites. All transactions sent to a primary backup appliance during a consistent transaction set creation interval are formed into a consistent transaction set by efficiently adding new transactions as they are received and removing unnecessary transfers as newer versions arrive. When the creation interval has expired, the complete consistent transaction set is transferred to a secondary backup appliance to be used to update a consistent backup copy of the primary site data. For each consistent transaction set, there will be a tree data structure (a search tree) created that contains the addressing information for all of the blocks of data in the consistent transaction set. The tree data structure used is a modified splay tree, which is a specialization of a binary search tree such that accessed nodes are “percolated” to the top of the tree for faster subsequent access. Secondary data consistency is maintained because the consistent transaction sets are applied whole at the secondary site, and after application, the secondary volumes are exact copies of the primary volumes at the time the consistent transaction set was completed.

摘要翻译： 公开了一种系统，方法和计算机程序产品，用于有效地创建一致的事务集以在不同的数据存储站点维护一个或多个数据副本。 在一致的事务集创建间隔期间发送到主备份设备的所有事务通过在接收到高效添加新事务时被形成为一致的事务集，并在新的版本到达时删除不必要的传输。 创建间隔已过期时，完整的一致事务集将传输到辅助备份设备，以用于更新主站点数据的一致备份副本。 对于每个一致的事务集，将创建一个包含一致事务集中所有数据块的寻址信息的树数据结构（搜索树）。 所使用的树数据结构是一个修改后的播放树，它是一个二叉搜索树的专门化，使得被访问的节点被“穿越”到树的顶部，以便更快的后续访问。 维持辅助数据一致性，因为一致的事务集整体应用于辅助站点，并且在应用程序之后，辅助卷是一致事务集完成时主卷的精确副本。

公开(公告)号：US20050278388A1

公开(公告)日：2005-12-15

申请号：US11093392

申请日：2005-03-30

申请人： Henry Butterworth ,  Kenneth Day ,  Philip Doatmas ,  John Wolfgang ,  Vitaly Zautner ,  Aviad Zlotnick

发明人： Henry Butterworth ,  Kenneth Day ,  Philip Doatmas ,  John Wolfgang ,  Vitaly Zautner ,  Aviad Zlotnick

IPC分类号： G06F7/00

CPC分类号： G06F11/08 ,  Y10S707/99952 ,  Y10S707/99953

摘要： An apparatus, system, and method are disclosed for reliably updating a data group in a data replication environment. The apparatus, system, and method reliably update the data group by receiving an updated data group sent from a first storage medium to a second storage medium, comparing the updated data group with a previous data group previously existing on the second storage medium and writing the updated data group to the second storage medium. The read-before-write and differencing method disclosed maintain reliability by storing multiple copies of changes made to the second storage medium during and after the write process.

摘要翻译： 公开了用于可靠地更新数据复制环境中的数据组的装置，系统和方法。 装置，系统和方法通过接收从第一存储介质发送到第二存储介质的更新数据组来可靠地更新数据组，将更新的数据组与先前存在于第二存储介质上的先前数据组进行比较， 更新数据组到第二存储介质。 所公开的预写入和差分方法通过在写入过程中和之后存储对第二存储介质所做的更改的多个副本来保持可靠性。

公开(公告)号：US20080071999A1

公开(公告)日：2008-03-20

申请号：US11945098

申请日：2007-11-26

申请人： Kenneth Boyd ,  Kenneth Day ,  Charles Lickel ,  John Wolfgang

发明人： Kenneth Boyd ,  Kenneth Day ,  Charles Lickel ,  John Wolfgang

IPC分类号： G06F12/00

CPC分类号： G06F11/2069 ,  G06F11/2076

摘要： Provided are a method, system, and article of manufacture, wherein a controller receives a request from one of a plurality of hosts. The controller determines whether a primary storage control unit coupled to the controller is operational. A response is generated by accessing the primary storage control unit, in response to determining that the primary storage control unit is operational. The response is generated by accessing a secondary storage control unit, in response to determining that the primary storage control unit is not operational, wherein data is replicated synchronously from the primary storage control unit to the secondary storage control unit.

摘要翻译： 提供了一种方法，系统和制品，其中控制器从多个主机之一接收请求。 控制器确定耦合到控制器的主存储控制单元是否可操作。 响应于确定主存储控制单元是可操作的，通过访问主存储控制单元来产生响应。 响应于响应于确定主存储控制单元不可操作而访问辅助存储控制单元而产生响应，其中数据从主存储控制单元同步地复制到辅助存储控制单元。

公开(公告)号：US20050193247A1

公开(公告)日：2005-09-01

申请号：US10788174

申请日：2004-02-25

申请人： Philip Doatmas ,  Kenneth Day ,  Kenneth Boyd ,  John Wolfgang

发明人： Philip Doatmas ,  Kenneth Day ,  Kenneth Boyd ,  John Wolfgang

IPC分类号： G06F11/00

CPC分类号： G06F11/2064 ,  G06F11/1458 ,  G06F11/2071 ,  G06F2201/82 ,  Y10S707/99942 ,  Y10S707/99943 ,  Y10S707/99953 ,  Y10S707/99955

摘要： A system, method and computer program product are provided to improve the efficiency of the transmission of consistency groups across multiple storage components by ensuring that volume transactions are evenly allocated among backup components. Each volume is initially assigned to a specified backup component. Once a color period begins, volume transactions are transmitted to the assigned backup component. Each backup component accumulates data transfer information for its assigned volumes throughout at least a portion of the color period and calculates a new volume assignment for the next color period. Before the start of the next color period, a captain storage controller transmits any new assignments to the backup components. During a next color period, the process is repeated using the new assignments.

摘要翻译： 提供了一种系统，方法和计算机程序产品，通过确保在备份组件之间均匀分配卷事务来提高跨多个存储组件的一致性组传输的效率。 每个卷最初分配给指定的备份组件。 一旦颜色周期开始，卷事务将被传输到分配的备份组件。 每个备份组件在颜色周期的至少一部分中累积其分配的卷的数据传输信息，并计算下一个颜色周期的新的卷分配。 在下一个色彩周期开始之前，船长存储控制器将任何新的作业传送到备份组件。 在下一个颜色期间，使用新的作业重复该过程。

公开(公告)号：US20050228955A1

公开(公告)日：2005-10-13

申请号：US10822410

申请日：2004-04-12

申请人： Kenneth Day ,  John Wolfgang ,  Kenneth Boyd ,  Philip Doatmas

发明人： Kenneth Day ,  John Wolfgang ,  Kenneth Boyd ,  Philip Doatmas

IPC分类号： G06F12/00 ,  G06F12/08

CPC分类号： G06F12/0862 ,  G06F12/0866 ,  G06F2212/6028

摘要： Provided are a method, system and program for prefetching data into cache. A prefetch command is processed that indicates at least one conditional statement and at least one block to prefetch from storage to cache in response to determining that the conditional statement is satisfied.

摘要翻译： 提供了一种用于将数据预取到高速缓存中的方法，系统和程序。 处理预取命令，其响应于确定满足条件语句，指示至少一个条件语句和至少一个块来从存储器预缓存。

公开(公告)号：US20050177692A1

公开(公告)日：2005-08-11

申请号：US10772875

申请日：2004-02-05

申请人： Kenneth Boyd ,  Kenneth Day ,  Philip Doatmas ,  John Wolfgang

发明人： Kenneth Boyd ,  Kenneth Day ,  Philip Doatmas ,  John Wolfgang

IPC分类号： G06F12/16

CPC分类号： G06F11/2064 ,  G06F11/2071 ,  G06F11/2082 ,  G06F2201/855

摘要： A network component useful in tracking write activity by writing logs containing write address information is described. The tracking component may be used in networked systems employing data mirrors to record data block addresses written to a primary storage volume during the time a data mirror is unavailable. The tracking component can be available to any network originating node, and may therefore track write activity on multiple volumes. At the time a data mirror is reconstructed, the log written may be used to construct a list of block addresses pointing to locations on a primary storage volume wherein data differs from a secondary storage volume member of the mirror. The locations maybe copied from the primary to secondary storage volume to reconstruct the data mirror. The performance impact of the tracking component is minimal and a shared network resource is offered that increases fault tolerance in the event of backup device failures.

摘要翻译： 描述了通过写入包含写入地址信息的日志来跟踪写入活动的网络组件。 跟踪组件可以用于使用数据镜来记录数据镜不可用时写入主存储卷的数据块地址的网络系统。 跟踪组件可用于任何网络始发节点，并且因此可以跟踪多个卷上的写入活动。 在重建数据镜像时，所写入的日志可以用于构造指向主存储卷上的位置的块地址的列表，其中数据与镜像的辅助存储卷成员不同。 这些位置可能从主存储卷复制到副存储卷，以重构数据镜像。 跟踪组件的性能影响最小，并提供共享网络资源，从而在备份设备故障的情况下增加容错能力。

公开(公告)号：US20050050197A1

公开(公告)日：2005-03-03

申请号：US10652144

申请日：2003-08-29

申请人： Kenneth Boyd ,  Kenneth Day ,  Philip Doatmas ,  John Wolfgang

发明人： Kenneth Boyd ,  Kenneth Day ,  Philip Doatmas ,  John Wolfgang

IPC分类号： G06F12/00 ,  G06F13/00 ,  G06F15/163 ,  G06F15/173

CPC分类号： G06F11/1456

摘要： A method to select a captain control node from a plurality of interconnected control nodes is disclosed. The method provides by each of the plurality of control nodes a first signal to each of the other control nodes, and then receives by each of the plurality of control nodes, a response signal from each of the other control nodes. The method then calculates by each of the plurality of control nodes individual response times for each of the other control nodes, and determines by each control node its aggregate response time. The method then determines whether to select a captain control node using the aggregate response times. If the captain control node is selected using the aggregate response times, then the method then determines the minimum aggregate response time, and designates the control node having that minimum aggregate response time the captain control node.

摘要翻译： 公开了一种从多个互连的控制节点中选择船长控制节点的方法。 该方法由多个控制节点中的每一个向每个其他控制节点提供第一信号，然后由多个控制节点中的每一个接收来自每个其他控制节点的响应信号。 该方法然后由多个控制节点中的每一个由每个其他控制节点的各个响应时间计算，并由每个控制节点确定其聚合响应时间。 该方法然后确定是否使用聚合响应时间来选择船长控制节点。 如果使用聚合响应时间选择队长控制节点，则该方法然后确定最小聚合响应时间，并且指定具有该队列控制节点具有该最小聚合响应时间的控制节点。

公开(公告)号：US20070220312A1

公开(公告)日：2007-09-20

申请号：US11357375

申请日：2006-02-17

申请人： Kenneth Boyd ,  Kenneth Day ,  Stephen Edel ,  John Wolfgang ,  Harry Yudenfriend

发明人： Kenneth Boyd ,  Kenneth Day ,  Stephen Edel ,  John Wolfgang ,  Harry Yudenfriend

IPC分类号： G06F11/00

CPC分类号： G06F11/2094 ,  G06F11/2097

摘要： An apparatus, system, and method are disclosed for switching a volume address association in a point-in-time copy relationship. A copy module creates a point-in-time copy structure of a source volume at a target volume. A migration module copies data from the source volume to the target volume. A detection module detects data corruption in the source volume. A switch module switches a logical volume address from a source volume address of the source volume to a target volume address of the target volume in response to detecting the data corruption, redirecting data reads and writes to the target volume. In one embodiment, a tracking module tracks a current target volume copy of source volume data and redirects an access for source volume data without the current target volume copy to the source volume.

摘要翻译： 公开了一种用于在时间点复制关系中切换卷地址关联的装置，系统和方法。 复制模块在目标卷创建源卷的时间点复制结构。 迁移模块将数据从源卷复制到目标卷。 检测模块检测源卷中的数据损坏。 响应于检测到数据损坏，将数据读取和写入重定向到目标卷，交换机模块将逻辑卷地址从源卷的源卷地址切换到目标卷的目标卷地址。 在一个实施例中，跟踪模块跟踪源卷数据的当前目标卷副本，并将源卷数据的访问重定向，而不将当前目标卷拷贝重定向到源卷。

公开(公告)号：US20070130222A1

公开(公告)日：2007-06-07

申请号：US11293608

申请日：2005-12-01

申请人： John Wolfgang ,  Kenneth Boyd ,  Kenneth Day

发明人： John Wolfgang ,  Kenneth Boyd ,  Kenneth Day

IPC分类号： G06F17/30

CPC分类号： G06F3/065 ,  G06F3/0617 ,  G06F3/0689 ,  G06F11/2069

摘要： Provided are a method, system, and program for establishing copy relationships to copy source data to target data. A request is received to establish a copy relationship indicating to copy source data to target data. A determination is made as to whether the source data defined in the request comprises target data defined in a preexisting copy relationship. A determination is made as to whether base source data copied to the target data in the preexisting copy relationship also comprises the source data indicated in the request in response to determining that the source data defined in the request comprises target data in the preexisting copy relationship. A new copy relationship is defined to copy the determined base source data to the target data indicated in the request.

摘要翻译： 提供了一种用于建立复制关系以将源数据复制到目标数据的方法，系统和程序。 接收请求以建立指示将源数据复制到目标数据的复制关系。 确定在请求中定义的源数据是否包含以预先存在的复制关系定义的目标数据。 确定复制到预先存在的复制关系中的目标数据的基本源数据是否还包括在请求中指示的源数据，以响应于确定在请求中定义的源数据包括预先存在的复制关系中的目标数据。 定义了新的复制关系，将确定的基本源数据复制到请求中指示的目标数据。