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1. 发明授权

US08401997B1 System and method for replication using consistency interval markers in a distributed storage environment 有权
标题翻译：在分布式存储环境中使用一致性间隔标记进行复制的系统和方法
公开(公告)号：US08401997B1
公开(公告)日：2013-03-19
申请号：US11230976
申请日：2005-09-20
申请人： Deepak Tawri , Ronald S. Karr , John A. Colgrove , Raghu Krishnamurthy , Anand A. Kekre , Robert Baird , Oleg Kiselev
发明人： Deepak Tawri , Ronald S. Karr , John A. Colgrove , Raghu Krishnamurthy , Anand A. Kekre , Robert Baird , Oleg Kiselev
IPC分类号： G06F7/00 , G06F17/00
CPC分类号： G06F11/2064 , G06F11/2071 , G06F2201/84 , G06F2201/855
摘要： Applications executing on various nodes in a distributed storage environment may write data to primary storage and may also replicate the data to secondary storage via a replication target. An interval coordinator may coordinate the periodic saving of checkpoints or snapshots of the replicated data. The interval coordinator may determine the length of consistency intervals between the saving of each of the checkpoints. Writes to the replication target from each of the nodes may be associated with the current consistency interval and, in some embodiments, with a unique per-node sequence number. When transitioning between consistency intervals, each node may be configured to temporarily suspend completion of the writes and to send the replication target a consistency interval marker indicating that the node has completed all writes for the current consistency interval.
摘要翻译：在分布式存储环境中在各种节点上执行的应用程序可以将数据写入主存储器，并且还可以经由复制目标将数据复制到辅助存储器。间隔协调器可以协调定期保存复制数据的检查点或快照。间隔协调器可以确定保存每个检查点之间的一致性间隔的长度。从每个节点写入复制目标可以与当前的一致性间隔相关联，并且在一些实施例中可以与唯一的每节点序列号相关联。当在一致性间隔之间转换时，可以将每个节点配置为临时挂起写入完成，并向复制目标发送指示节点已完成当前一致性间隔的所有写入的一致性间隔标记。

2. 发明授权

US07739464B1 Consistent backups of data using a roll-back log 有权
标题翻译：使用回滚日志对数据进行一致的备份
公开(公告)号：US07739464B1
公开(公告)日：2010-06-15
申请号：US10881723
申请日：2004-06-30
申请人： Timothy R. Coulter , Raghu Krishnamurthy , Par A. Botes
发明人： Timothy R. Coulter , Raghu Krishnamurthy , Par A. Botes
IPC分类号： G06F12/00 , G06F13/00 , G06F13/28
CPC分类号： G06F11/1466
摘要： A system or method for creating a point-in-time (PIT) or backup copy of one or more data volumes using a roll-back log. The backup copy can be created without employing hot backup mode. In one embodiment, the method includes copying data blocks of a volume to a backup memory configured to store a backup copy of the volume, wherein the data blocks are sequentially copied until all of the data blocks of the volume are copied to the backup memory. A first request is generated to overwrite existing data of a first data block of the volume with new data before all of the data blocks of the volume are copied to the backup memory. Before overwriting the existing data and before all of the data blocks of the volume are copied to the backup memory, the existing data is copied to a first memory (e.g., the roll-back log). Before all of the data blocks of the volume are copied to the backup memory, the existing data is overwritten with the new data.
摘要翻译：使用回滚日志创建一个或多个数据卷的时间点（PIT）或备份副本的系统或方法。可以创建备份副本而不使用热备份模式。在一个实施例中，该方法包括将卷的数据块复制到配置为存储卷的备份副本的备份存储器，其中数据块被顺序复制，直到卷的所有数据块被复制到备份存储器。生成第一个请求，以在卷的所有数据块被复制到备份存储器之前用新的数据覆盖卷的第一数据块的现有数据。在覆盖现有数据之前，并且在卷的所有数据块被复制到备份存储器之前，现有数据被复制到第一存储器（例如，回滚日志）。在将卷的所有数据块复制到备份存储器之前，现有数据将被新数据覆盖。

3. 发明授权

US07467265B1 System and method for block conflict resolution within consistency interval marker based replication 有权
标题翻译：基于一致性间隔标记的复制中的块冲突解决的系统和方法
公开(公告)号：US07467265B1
公开(公告)日：2008-12-16
申请号：US11231185
申请日：2005-09-20
申请人： Deepak Tawri , Ronald S. Karr , John A. Colgrove , Raghu Krishnamurthy , Anand A. Kekre , Robert Baird , Oleg Kiselev
发明人： Deepak Tawri , Ronald S. Karr , John A. Colgrove , Raghu Krishnamurthy , Anand A. Kekre , Robert Baird , Oleg Kiselev
IPC分类号： G06F12/00
CPC分类号： G06F12/0815 , G06F12/0813
摘要： One goal of consistency interval replication is to achieve a consistent copy of data generated by independent streams of writes from nodes in a clustered/distributed environment. Two writes to the same block from different nodes may arrive at a replication target in a different order from the order in which they were written to primary storage. A consistency interval coordinator may analyze a list of blocks modified during a consistency interval to determine conflict blocks written to by two different nodes during the same consistency interval. Conflict resolution may involve a node reading data for a conflict block from primary storage and forwarding it to the replication target or a node completing a suspended in-progress write for the conflict block. Once the conflicts have been resolved, the replication target may checkpoint the data modified during the interval and nodes may resume writes to the conflict blocks for the new interval.
摘要翻译：一致性间隔复制的一个目标是实现由集群/分布式环境中的独立的写入流生成的数据的一致副本。从不同节点对同一个块的两次写入可能会以与写入主存储的顺序不同的顺序到达复制目标。一致性间隔协调器可以分析在一致性间隔期间修改的块的列表，以确定在相同的一致性间隔期间由两个不同节点写入的冲突块。冲突解决可能涉及一个节点从主存储器读取冲突块的数据，并将其转发到复制目标或完成冲突块的暂停进行中写入的节点。一旦冲突已经解决，复制目标可以检查在间隔期间修改的数据，并且节点可以恢复对新间隔的冲突块的写入。

4. 发明授权

US07191299B1 Method and system of providing periodic replication 有权
标题翻译：提供周期性复制的方法和系统
公开(公告)号：US07191299B1
公开(公告)日：2007-03-13
申请号：US10436354
申请日：2003-05-12
申请人： Anand K. Kekre , Ronald S. Karr , John A. Colgrove , Kedar M. Karmarkar , Raghu Krishnamurthy , Saurabh R. Godbole , Ming Xu , Vikas K. Gupta , Deepak Tawri
发明人： Anand K. Kekre , Ronald S. Karr , John A. Colgrove , Kedar M. Karmarkar , Raghu Krishnamurthy , Saurabh R. Godbole , Ming Xu , Vikas K. Gupta , Deepak Tawri
IPC分类号： G06F12/00
CPC分类号： G06F11/2074 , G06F2201/84 , Y10S707/99953 , Y10S707/99955
摘要： A method and system of providing periodic replication is disclosed. According to one embodiment, a method is provided which comprises creating a storage object corresponding to a data volume, wherein the storage object comprises a point-in-time copy of the data volume and a data volume map; and replicating the data volume utilizing the storage object.
摘要翻译：公开了提供周期性复制的方法和系统。根据一个实施例，提供了一种方法，其包括创建对应于数据卷的存储对象，其中所述存储对象包括所述数据卷的时间点副本和数据卷映射; 并利用存储对象复制数据量。

5. 发明授权

US08825870B1 Techniques for non-disruptive transitioning of CDP/R services 有权
标题翻译： CDP / R服务的非破坏性转换技术
公开(公告)号：US08825870B1
公开(公告)日：2014-09-02
申请号：US11771608
申请日：2007-06-29
申请人： Deepak Tawri , Abhay Kumar Singh , Raghu Krishnamurthy , Gopal Sharma
发明人： Deepak Tawri , Abhay Kumar Singh , Raghu Krishnamurthy , Gopal Sharma
IPC分类号： G06F15/16 , G06F15/173 , G06F15/177 , G06F15/167 , G06F12/00
CPC分类号： H04L12/56
摘要： Techniques for CDP/R services are disclosed. In one particular exemplary embodiment, the techniques may be realized as a method of transitioning continuous data protection and replication comprising determining whether a first appliance node connected to a switched fabric contains one or more transactions received from a host node, unregistering a world wide port name of a target port of the first appliance node, registering the world wide port name to a target port of a second appliance node connected to the switched fabric, associating one or more logical unit numbers of the second appliance node with the target port of the second appliance node, exporting the one or more logical unit numbers of the second appliance node, logging the target port of the second appliance node into a switched fabric, and logging the target port of the second appliance node into a remote node port of the host node.
摘要翻译：公开了CDP / R服务的技术。在一个特定的示例性实施例中，可以将技术实现为转换连续数据保护和复制的方法，包括确定连接到交换结构的第一设备节点是否包含从主机节点接收的一个或多个事务，注销全球端口名称将所述全球端口名称注册到连接到所述交换结构的第二设备节点的目标端口，将所述第二设备节点的一个或多个逻辑单元号与所述第二设备节点的目标端口相关联导出第二设备节点的一个或多个逻辑单元号，将第二设备节点的目标端口记录到交换结构中，以及将第二设备节点的目标端口记录到主机节点的远程节点端口中。

6. 发明授权

US07925630B1 Method of inserting a validated time-image on the primary CDP subsystem in a continuous data protection and replication (CDP/R) subsystem 有权
标题翻译：在连续数据保护和复制（CDP / R）子系统中的主CDP子系统上插入经过验证的时间映像的方法
公开(公告)号：US07925630B1
公开(公告)日：2011-04-12
申请号：US11731351
申请日：2007-03-30
申请人： Raghu Krishnamurthy , Robert Koeten
发明人： Raghu Krishnamurthy , Robert Koeten
IPC分类号： G06F7/00 , G06F17/00
CPC分类号： G06F17/30088 , G06F11/1469 , G06F11/1471 , G06F11/2023 , G06F11/2097
摘要： A method for inserting a validated time-image on a primary CDP subsystem in a continuous data protection and replication (CDP/R) subsystem. In one embodiment, the method includes processing data of RI1 at a secondary system in accordance with a recovery process, wherein RI1 is a first image of a replication of a data object. First data is generated in response to processing the data of RI1 in accordance with the recovery process, wherein the first data relates to processing the data of RI1 in accordance with the recovery process. Once the first data is generated, a copy of the first data is transmitted to a primary system that stores the data object.
摘要翻译：一种用于在连续数据保护和复制（CDP / R）子系统中的主CDP子系统上插入经过验证的时间映像的方法。在一个实施例中，该方法包括根据恢复过程在次系统处理RI1的数据，其中RI1是数据对象的复制的第一图像。响应于根据恢复处理处理RI1的数据而生成第一数据，其中第一数据涉及根据恢复处理处理RI1的数据。一旦生成了第一个数据，将第一个数据的副本传送到存储数据对象的主系统。

7. 发明授权

US07809691B1 System and method of applying incremental changes prior to initialization of a point-in-time copy 有权
标题翻译：在初始化时间点副本之前应用增量更改的系统和方法
公开(公告)号：US07809691B1
公开(公告)日：2010-10-05
申请号：US11063133
申请日：2005-02-22
申请人： Kedar M. Karmarkar , Deepak Tawri , Raghu Krishnamurthy
发明人： Kedar M. Karmarkar , Deepak Tawri , Raghu Krishnamurthy
IPC分类号： G06F17/30 , G06F12/00
CPC分类号： G06F11/1448 , G06F11/1464 , G06F11/1469 , G06F11/1658 , G06F11/202
摘要： Various systems and methods are disclosed for applying incremental changes prior to initialization of a point-in-time copy. For example, one method involves identifying an incremental change to information stored on a primary device. The incremental change is identified subsequent to a first point in time. The incremental change is applied to a first target device, prior to completing initialization of a second target device. The initialization of the second target device initializes the second target device as a point-in-time copy of the primary device. The point-in-time copy of the primary device is a copy of the primary device at the first point in time.
摘要翻译：公开了用于在初始化时间点副本之前应用增量变化的各种系统和方法。例如，一种方法涉及识别存储在主设备上的信息的增量变化。在第一个时间点之后确定增量更改。在完成第二目标设备的初始化之前，增量变化被应用于第一目标设备。第二目标设备的初始化将第二目标设备初始化为主设备的时间点副本。主设备的时间点副本是第一个时间点的主设备的副本。

8. 发明授权

US07765433B1 Technique for performing disaster rehearsal for a storage area network utilizing a replication appliance 有权
标题翻译：使用复制设备对存储区域网进行灾难排练的技术
公开(公告)号：US07765433B1
公开(公告)日：2010-07-27
申请号：US11686031
申请日：2007-03-14
申请人： Raghu Krishnamurthy
发明人： Raghu Krishnamurthy
IPC分类号： G06F11/00
CPC分类号： G06F11/2082 , G06F11/2074 , G06F11/2221
摘要： A technique for disaster rehearsal testing in storage area network (SAN) utilizing a replication appliance is disclosed. In one particular exemplary embodiment, the technique may be realized as a method for disaster rehearsal testing of a secondary storage area network utilizing a replication appliance comprising the steps of stopping data writes to one or more logical unit numbers associated with the secondary storage area network, accumulating the data writes from a primary storage area network in one or more journals associated with the secondary storage area network, redirecting one or more data input/output requests, wherein data writes generated by testing of the secondary storage area network are redirected to replication appliance associated with the secondary storage area network and read requests for data written by test data writes are redirected to the replication appliance and testing the secondary storage area network.
摘要翻译：公开了一种使用复制设备的存储区域网络（SAN）中的灾难排练测试技术。在一个特定示例性实施例中，该技术可以被实现为利用复制设备的辅助存储区域网络的灾难排练测试的方法，包括以下步骤：停止对与第二存储区域网络相关联的一个或多个逻辑单元号码的数据写入，在与辅助存储区域网络相关联的一个或多个期刊中累积来自主存储区域网络的数据写入，重定向一个或多个数据输入/输出请求，其中通过次级存储区域网络的测试生成的数据写入被重定向到复制设备与辅助存储区域网络相关联，并且通过测试数据写入写入的数据的读取请求被重定向到复制设备并测试辅助存储区域网络。

9. 发明授权

US07620785B1 Using roll-forward and roll-backward logs to restore a data volume 有权
标题翻译：使用前滚和后退日志恢复数据卷
公开(公告)号：US07620785B1
公开(公告)日：2009-11-17
申请号：US10881320
申请日：2004-06-30
申请人： Timothy R. Coulter , Raghu Krishnamurthy , Par A. Botes
发明人： Timothy R. Coulter , Raghu Krishnamurthy , Par A. Botes
IPC分类号： G06F12/00 , G06F13/00 , G06F13/28
CPC分类号： G06F11/1471 , G06F11/1469 , G06F11/1474
摘要： A roll-back memory can be used to incrementally restore one or more data volumes in reverse chronological order to the data state they occupied at some prior point in time without using a backup copy. After the one or more data volumes have been restored in reverse chronological order, a roll-forward memory can be used to incrementally restore the one or more data volumes in forward chronological order to the data state they occupied at some other point in time without using a backup copy. Incrementally restoring the one or more data volumes in reverse chronological order may follow an incremental restoration of the one or more data volumes in forward chronological order and vice versa until the one or more data volumes are in the data state they occupied just prior to, for example, a data corruption event.
摘要翻译：可以使用回滚存储器将一个或多个数据卷以相反的时间顺序递增地恢复到在某些先前时间点所占用的数据状态，而不使用备份副本。在一个或多个数据卷以相反的时间顺序恢复之后，可以使用前滚存储器以递增的顺序将一个或多个数据卷按时间顺序恢复到在某个其他时间点被占用的数据状态，而不使用备份副本。以相反的时间顺序递增地恢复一个或多个数据卷可以按照前向时间顺序对一个或多个数据卷的增量恢复，反之亦然，直到一个或多个数据卷处于它们之前占用的数据状态，对于例如，数据损坏事件。

10. 发明授权

US08699322B1 Port identifier management for path failover in cluster environments 有权
标题翻译：集群环境中路径故障转移的端口标识符管理
公开(公告)号：US08699322B1
公开(公告)日：2014-04-15
申请号：US12856994
申请日：2010-08-16
申请人： Deepak K. Tawri , Abhay K. Singh , Raghu Krishnamurthy
发明人： Deepak K. Tawri , Abhay K. Singh , Raghu Krishnamurthy
IPC分类号： H04J1/16
CPC分类号： H04L45/28 , G06F11/006 , G06F11/2005 , G06F11/2007 , H04L29/12207 , H04L29/12839 , H04L61/20 , H04L61/6022 , H04L67/1097 , H04L69/40
摘要： A method includes assigning a port identifier to a first port on a node and communicating data on a first path between the first port and a logical unit on an active/passive storage array. The port identifier is registered in a persistent reservation scheme for the logical unit. The method also includes detecting a failure of the first path, de-assigning the port identifier from the first port, assigning the port identifier to a second port on the first node, and resuming communications between the node and the logical unit. One implementation of a system includes a first port configured to communicate with a storage device, a second port configured to communicate with the storage device, and an identifier management block. The identifier management block executes a failover with N_Port ID Virtualization commands that transfer a world wide port name from the first port to the second port.
摘要翻译：一种方法包括将端口标识符分配给节点上的第一端口，并且在主动/被动存储阵列上的第一端口与逻辑单元之间的第一路径上传送数据。端口标识符被注册在用于逻辑单元的持久预留方案中。该方法还包括检测第一路径的故障，从第一端口去分配端口标识符，将端口标识符分配给第一节点上的第二端口，以及恢复节点与逻辑单元之间的通信。系统的一个实现包括被配置为与存储设备通信的第一端口，被配置为与存储设备通信的第二端口以及标识符管理块。标识符管理块使用N_Port ID Virtualization命令执行故障转移，该命令将全球端口名称从第一个端口传输到第二个端口。

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