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1. 发明授权

US07707372B1 Updating a change track map based on a mirror recovery map 有权
标题翻译：基于镜像恢复映射更新更改轨迹映射
公开(公告)号：US07707372B1
公开(公告)日：2010-04-27
申请号：US10882112
申请日：2004-06-30
申请人： Mukul Kumar , Ronald S. Karr , Subhojit Roy , Prasad Limaye , Raghu Krishnamurthy , Anand A. Kekre
发明人： Mukul Kumar , Ronald S. Karr , Subhojit Roy , Prasad Limaye , Raghu Krishnamurthy , Anand A. Kekre
IPC分类号： G06F12/00
CPC分类号： G06F11/2082 , G06F2201/84
摘要： One method of updating a change track map involves resetting a mirror recovery map for a data volume. Just before the mirror recovery map is reset, a change track map for the data volume can be updated, using the mirror recovery map. The mirror recovery map can be reset by a data element of a data processing system, while the change track map can be updated by a control element of the data processing system.
摘要翻译：更新更改轨迹映射的一种方法涉及重置数据卷的镜像恢复映射。在镜像恢复映射重置之前，可以使用镜像恢复映射更新数据卷的更改轨迹图。可以通过数据处理系统的数据元素来重置镜像恢复映射，同时可以通过数据处理系统的控制元件来更新改变轨迹图。

2. 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。

3. 发明授权

US07657717B1 Coherently sharing any form of instant snapshots separately from base volumes 有权
标题翻译：与基本卷分开地共享任何形式的即时快照
公开(公告)号：US07657717B1
公开(公告)日：2010-02-02
申请号：US10770358
申请日：2004-02-02
申请人： Ronald S. Karr , Anand A. Kekre
发明人： Ronald S. Karr , Anand A. Kekre
IPC分类号： G06F12/16
CPC分类号： G06F17/30067
摘要： A computer system that implements a method for creating a virtual snapshot of a first storage object. A first storage object such as a data volume is created, wherein creating the first storage object includes creating a first storage object description. This first storage object description relates the first storage object to underlying first storage objects or first physical memory regions. After creating the first storage object, a virtual copy of the first storage object is created as a second storage object. Creating the second storage object includes creating a second storage object description, wherein the second storage object description relates the second storage object to the first storage object. The first storage object is transmitted to a first computer system, and the second storage object description is transmitted to a second computer system.
摘要翻译：一种实现用于创建第一存储对象的虚拟快照的方法的计算机系统。创建诸如数据卷的第一存储对象，其中创建第一存储对象包括创建第一存储对象描述。该第一存储对象描述将第一存储对象与底层的第一存储对象或第一物理存储区相关联。创建第一个存储对象后，将创建第一个存储对象的虚拟副本作为第二个存储对象。创建第二存储对象包括创建第二存储对象描述，其中第二存储对象描述将第二存储对象与第一存储对象相关联。第一存储对象被发送到第一计算机系统，并且第二存储对象描述被发送到第二计算机系统。

4. 发明授权

US07620666B1 Maintaining persistent data change maps for fast data synchronization and restoration 有权
标题翻译：维护持久性数据更改映射，实现快速数据同步和恢复
公开(公告)号：US07620666B1
公开(公告)日：2009-11-17
申请号：US10207451
申请日：2002-07-29
申请人： Michael E. Root , Anand A. Kekre , Arun M. Rokade , John A. Colgrove , Ronald S. Karr , Oleg Kiselev
发明人： Michael E. Root , Anand A. Kekre , Arun M. Rokade , John A. Colgrove , Ronald S. Karr , Oleg Kiselev
IPC分类号： G06F12/00
CPC分类号： G06F11/1451 , G06F11/1469 , G06F11/2082 , Y10S707/99955
摘要： A method, system, computer system and computer program product to synchronize data and a snapshot of the data taken at a given point in time. Persistent data change maps are used to track changes made to data after a snapshot of the data is taken. Changes to the data are tracked using a persistent accumulator map, and changes to the data with respect to a second set of data are tracked using a persistent volume map. The persistent accumulator map is updated with each update of the data. Persistent volume maps are updated when a subsequent snapshot of the data is taken. Only changes to the data made after the snapshot was taken are applied to synchronize the snapshot with the data so that all of the data is not copied. Snapshots can be located in a physically separate location from the data itself.
摘要翻译：一种方法，系统，计算机系统和计算机程序产品，用于同步数据和在给定时间点拍摄的数据的快照。持久性数据更改映射用于跟踪数据快照执行后对数据所做的更改。使用持久累加器映射跟踪对数据的更改，并使用持久卷映射来跟踪相对于第二组数据的数据更改。每次更新数据更新持久累加器映射。当采集数据的后续快照时，持久卷映射将被更新。拍摄快照后仅对数据进行的更改将被应用于使快照与数据同步，以便不复制所有数据。快照可以位于与数据本身的物理上分离的位置。

5. 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。

6. 发明授权

US07409512B1 Method and apparatus for maintaining information that indicates valid regions of a working volume and using that information to delay volume initialization 有权
标题翻译：用于维护指示工作卷的有效区域并使用该信息来延迟卷初始化的信息的方法和装置
公开(公告)号：US07409512B1
公开(公告)日：2008-08-05
申请号：US10882612
申请日：2004-07-01
申请人： Anand A. Kekre , John A. Colgrove , Oleg Kiselev , Ronald S. Karr
发明人： Anand A. Kekre , John A. Colgrove , Oleg Kiselev , Ronald S. Karr
IPC分类号： G06F12/16
CPC分类号： G06F11/2082 , G06F11/1076 , G06F11/1662 , G06F11/2087 , G06F11/2094 , G06F2211/104 , Y10S707/99952
摘要： Various embodiments of systems and methods are disclosed for tracking valid regions of a working volume. State information identifies which regions of the working volume are currently valid. When the volume is created, the state information can be initialized to a value that identifies all regions of the volume as being invalid. The invalid regions do not need to be synchronized, since there will not be any need to reconstruct the data within those regions to a particular value. Accordingly, volume initialization, which synchronizes redundant data (e.g., RAID parity or a mirrored copy) with application data in the invalid regions, can be delayed. As the volume is accessed by an application, the redundant data associated with the regions being accessed is synchronized, and the state information is updated to indicate that those regions are valid.
摘要翻译：公开了用于跟踪工作体积的有效区域的系统和方法的各种实施例。状态信息确定工作量的哪些区域当前有效。创建卷时，可以将状态信息初始化为将卷的所有区域标识为无效的值。无效区域不需要同步，因为不需要将这些区域内的数据重构为特定值。因此，可以延迟将冗余数据（例如，RAID奇偶校验或镜像拷贝）与无效区域中的应用数据同步的卷初始化。当应用程序访问卷时，与被访问的区域相关联的冗余数据被同步，并且更新状态信息以指示那些区域是有效的。

7. 发明授权

US06785789B1 Method and apparatus for creating a virtual data copy 有权
标题翻译：用于创建虚拟数据副本的方法和装置
公开(公告)号：US06785789B1
公开(公告)日：2004-08-31
申请号：US10143059
申请日：2002-05-10
申请人： Anand A. Kekre , John A. Colgrove , Oleg Kiselev , Ronald S. Karr , Niranjan S. Pendharkar
发明人： Anand A. Kekre , John A. Colgrove , Oleg Kiselev , Ronald S. Karr , Niranjan S. Pendharkar
IPC分类号： G06F1216
CPC分类号： G06F11/1446 , G06F11/1471 , G06F2201/815 , G06F2201/84
摘要： A virtual copy of data stored in a first memory is created in a second memory. Creating the virtual copy includes, in one embodiment, creating first and second tables in memory each one of which comprises a plurality of multibit entries. Each entry of the first table corresponds to a respective memory region of the first memory. Each entry of the second table corresponds to a respective memory region of the second memory. The first bit of the first and second tables indicates whether the corresponding memory region of the first and second memories, respectively, contains valid data. The second bit of the first and second tables indicates whether data in the corresponding memory region of the first and second memories, respectively, has been modified since the creation of the first and second tables, respectively.
摘要翻译：在第二存储器中创建存储在第一存储器中的数据的虚拟副本。在一个实施例中，创建虚拟副本包括在内存中创建第一和第二表，其中每个表包括多个多位条目。第一表的每个条目对应于第一存储器的相应存储区域。第二表的每个条目对应于第二存储器的相应存储区域。第一和第二表的第一位分别指示第一和第二存储器的相应存储区域是否包含有效数据。第一和第二表的第二位分别表示自第一和第二表的创建以来分别在第一和第二存储器的相应存储器区域中的数据是否被修改。

8. 发明授权

US08001347B1 Coherently sharing any form of instant snapshots separately from base volumes 有权
标题翻译：与基本卷分开地共享任何形式的即时快照
公开(公告)号：US08001347B1
公开(公告)日：2011-08-16
申请号：US12570681
申请日：2009-09-30
申请人： Ronald S. Karr , Anand A. Kekre
发明人： Ronald S. Karr , Anand A. Kekre
IPC分类号： G06F12/16
CPC分类号： G06F17/30067
摘要： A computer system that implements a method for creating a virtual snapshot of a first storage object. A first storage object such as a data volume is created, wherein creating the first storage object includes creating a first storage object description. This first storage object description relates the first storage object to underlying first storage objects or first physical memory regions. After creating the first storage object, a virtual copy of the first storage object is created as a second storage object. Creating the second storage object includes creating a second storage object description, wherein the second storage object description relates the second storage object to the first storage object. The first storage object is transmitted to a first computer system, and the second storage object description is transmitted to a second computer system.
摘要翻译：一种实现用于创建第一存储对象的虚拟快照的方法的计算机系统。创建诸如数据卷的第一存储对象，其中创建第一存储对象包括创建第一存储对象描述。该第一存储对象描述将第一存储对象与底层的第一存储对象或第一物理存储区相关联。创建第一个存储对象后，将创建第一个存储对象的虚拟副本作为第二个存储对象。创建第二存储对象包括创建第二存储对象描述，其中第二存储对象描述将第二存储对象与第一存储对象相关联。第一存储对象被发送到第一计算机系统，并且第二存储对象描述被发送到第二计算机系统。

9. 发明授权

US07657578B1 System and method for volume replication in a storage environment employing distributed block virtualization 有权
标题翻译：在采用分布式块虚拟化的存储环境中进行卷复制的系统和方法
公开(公告)号：US07657578B1
公开(公告)日：2010-02-02
申请号：US11017356
申请日：2004-12-20
申请人： Ronald S. Karr , Niranjan Pendharkar , Anand A. Kekre , Angshuman Bezbaruah , Vikas Kailash Gupta , Ashish Agarwal , Raghu Krishnamurthy , Michael Root , Kati Rader , Kedar Karmarkar
发明人： Ronald S. Karr , Niranjan Pendharkar , Anand A. Kekre , Angshuman Bezbaruah , Vikas Kailash Gupta , Ashish Agarwal , Raghu Krishnamurthy , Michael Root , Kati Rader , Kedar Karmarkar
IPC分类号： G06F17/30
CPC分类号： G06F11/2082 , G06F11/2069
摘要： A system for volume replication in a distributed block virtualization environment includes a first and a second set of one or more physical block devices, a first and a second volume server, one or more volume clients, and a replication manager. The first volume server may be configured to aggregate storage in the first set of one or more physical block devices into one or more logical volumes, and to make the one or more logical volumes accessible to the one or more volume clients. The replication manager may be configured to operate in cooperation with the first and second volume servers and the one or more volume clients to maintain a replica of at least a subset of the one or more logical volumes at the second set of one or more physical block devices.
摘要翻译：在分布式块虚拟化环境中用于卷复制的系统包括第一和第二组一个或多个物理块设备，第一和第二卷服务器，一个或多个卷客户端和复制管理器。第一卷服务器可以被配置为将第一组一个或多个物理块设备中的存储聚合成一个或多个逻辑卷，并使一个或多个逻辑卷可供一个或多个卷客户端访问。复制管理器可以被配置为与第一和第二卷服务器和一个或多个卷客户端协作地操作以在一个或多个物理块的第二集合处维护一个或多个逻辑卷的至少一个子集的副本设备。

10. 发明授权

US07313724B1 Method and apparatus for synchronizing redundant data with a volume 有权
标题翻译：用于使冗余数据与卷同步的方法和装置
公开(公告)号：US07313724B1
公开(公告)日：2007-12-25
申请号：US10882631
申请日：2004-07-01
申请人： Anand A. Kekre , John A. Colgrove , Oleg Kiselev , Ronald S. Karr
发明人： Anand A. Kekre , John A. Colgrove , Oleg Kiselev , Ronald S. Karr
IPC分类号： G06F11/00
CPC分类号： G06F11/2082 , G06F11/1451 , G06F11/2071
摘要： Various embodiments of systems and methods are disclosed for initially synchronizing redundant data (e.g., a mirror, a replica, or a set of parity information) with an original volume. State information identifies which regions of the original volume are currently valid, and only valid regions of the original volume are used to generate the values of the redundant data during the initial synchronization. For example, if the redundant data is a set of parity information, synchronizing the redundant data involves calculating one or more parity values based on the valid regions of the volume. If the redundant data is a duplicate copy (e.g., a mirror or replica) of the volume, synchronizing the redundant data involves copying the valid regions of the volume to the duplicate copy of the volume. If the original volume includes any invalid regions, unnecessary copying and/or processing for those regions can be avoided during the initial synchronization.
摘要翻译：公开了用于使冗余数据（例如，镜像，副本或一组奇偶校验信息）与原始卷同步的系统和方法的各种实施例。状态信息确定原始卷的哪些区域当前是有效的，并且只有原始卷的有效区域用于在初始同步期间生成冗余数据的值。例如，如果冗余数据是一组奇偶校验信息，则同步冗余数据涉及基于该体积的有效区域来计算一个或多个奇偶校验值。如果冗余数据是卷的重复副本（例如，镜像或副本），则同步冗余数据涉及将卷的有效区域复制到卷的副本。如果原始卷包括任何无效区域，则可以在初始同步期间避免对这些区域的不必要的复制和/或处理。

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