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1. 发明授权

US07685385B1 System and method for satisfying I/O requests before a replica has been fully synchronized 有权
标题翻译：在副本完全同步之前满足I / O请求的系统和方法
公开(公告)号：US07685385B1
公开(公告)日：2010-03-23
申请号：US11193844
申请日：2005-07-29
申请人： Anurag Choudhary , Arvind Arun Pande , Raghu Krishnamurthy
发明人： Anurag Choudhary , Arvind Arun Pande , Raghu Krishnamurthy
IPC分类号： G06F12/00
CPC分类号： G06F11/1471 , G06F11/2094
摘要： Various methods and systems are disclosed for handling I/O requests to a replica that has not yet been fully synchronized. One method involves detecting the transfer of the role of working volume from a first volume to a second volume. The second volume is configured as a replica of the first volume, but the second volume may not be fully synchronized with the first volume at the time that the role of working volume is transferred. Subsequent to the role of working volume being transferred to the second volume, a read request to the second volume is satisfied by accessing a log. The log is configured to store values that have been written to the first volume, and at least one of the values written to the first volume has not been written to the second volume.
摘要翻译：公开了用于处理对尚未完全同步的副本的I / O请求的各种方法和系统。一种方法涉及检测从第一体积到第二体积的工作体积的作用的转移。第二个卷被配置为第一个卷的副本，但是在传输工作卷的作用时，第二个卷可能不会与第一个卷完全同步。在将工作卷的角色转移到第二卷之后，通过访问日志来满足对第二卷的读取请求。日志配置为存储已写入第一个卷的值，并且写入第一个卷的至少一个值尚未写入第二个卷。

2. 发明授权

US07680839B1 System and method for resynchronizing mirrored volumes 有权
标题翻译：用于重新同步镜像卷的系统和方法
公开(公告)号：US07680839B1
公开(公告)日：2010-03-16
申请号：US10955017
申请日：2004-09-30
申请人： Raghu Krishnamurthy , Gopal Sharma , Amitava Guha
发明人： Raghu Krishnamurthy , Gopal Sharma , Amitava Guha
IPC分类号： G06F12/00
CPC分类号： G06F11/2082 , G06F11/1435 , G06F11/2071 , G06F2201/84
摘要： System and method for resynchronizing mirrored volumes in a storage system. According to one embodiment, a system may include a first volume located at a primary site and associated with a first storage management device, and a second volume located at a secondary site and associated with a second storage management device, where the secondary site is coupled to the primary site via a data link, and where the second volume is configured as a mirror of the first volume. The first storage management device may be configured to convey to the second storage management device an indication of a data block written to the first volume subsequent to a failure of the data link. Dependent upon the indication, the second storage management device may be configured to create a snapshot of the data block as stored on the second volume prior to resynchronization of the data block.
摘要翻译：在存储系统中重新同步镜像卷的系统和方法。根据一个实施例，系统可以包括位于主站点并与第一存储管理设备相关联的第一卷以及位于辅助站点并与第二存储管理设备相关联的第二卷，其中辅站点被耦合通过数据链接到主站点，并且其中第二卷被配置为第一卷的镜像。第一存储管理装置可以被配置为在数据链路发生故障之后向第二存储管理装置传送写入第一卷的数据块的指示。根据指示，第二存储管理设备可以被配置为在数据块重新同步之前创建存储在第二卷上的数据块的快照。

3. 发明授权

US07308545B1 Method and system of providing replication 有权
标题翻译：提供复制的方法和系统
公开(公告)号：US07308545B1
公开(公告)日：2007-12-11
申请号：US10723493
申请日：2003-11-26
申请人： Anand A. 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 A. 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： G06F11/2097 , G06F11/2023 , G06F2201/84 , H04L67/1095 , 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 storage volume, wherein the storage object comprises a point-in-time copy of the storage volume and a storage volume map; and replicating the storage volume using 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，其包括创建对应于存储卷的存储对象，其中所述存储对象包括所述存储卷的时间点副本和存储卷映射; 并使用存储对象复制存储卷。

4. 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。

5. 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。

6. 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。

7. 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。

8. 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。

9. 发明申请

US20130080754A1 Service Profile Based Peripheral Component Interconnect Device Enumeration And Option ROM Loading 审中-公开
标题翻译：基于服务配置文件的外围组件互连设备枚举和选件ROM加载
公开(公告)号：US20130080754A1
公开(公告)日：2013-03-28
申请号：US13239524
申请日：2011-09-22
申请人： Venkatramani SriSai Ganesh , Raghu Krishnamurthy , Chidananda Satya Kumar Patchava , Gururaja A. Nittur
发明人： Venkatramani SriSai Ganesh , Raghu Krishnamurthy , Chidananda Satya Kumar Patchava , Gururaja A. Nittur
IPC分类号： G06F9/24
CPC分类号： G06F9/4403
摘要： Techniques are provided for a computer device to receive and store data comprising information configured to indicate boot device parameters for devices to be initialized during a given boot sequence. Those devices that match the device parameters are initialized prior to loading the computer device's operating system. Devices that do not match the boot parameters are masked out by the BIOS, and Option ROM firmware is loaded and executed for those devices that match the boot parameters.
摘要翻译：为计算机设备提供技术以接收和存储包括被配置为指示在给定启动序列期间被初始化的设备的引导设备参数的信息的数据。那些与设备参数匹配的设备在加载计算机设备的操作系统之前被初始化。与引导参数不匹配的设备被BIOS屏蔽，对于与引导参数相匹配的设备，将加载并执行Option ROM固件。

10. 发明授权

US08010759B1 Extent redirect 有权
标题翻译：范围重定向
公开(公告)号：US08010759B1
公开(公告)日：2011-08-30
申请号：US11541006
申请日：2006-09-29
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： G06F11/1446 , G06F2201/84
摘要： Redirecting a data object such as a file block extent. The data object can be redirected from a first memory block to a second memory block, wherein the second memory block includes a copy of modified data of the first memory block. The redirection may occur in response to a request to modify data of the data object. Redirection preserves the prior version of the data object stored in the first memory block to enable restoration of the data object if needed. In one embodiment, a first data object is mapped to a first memory block. A copy of data contents of the first memory block is created. Thereafter, data contained within the copy is modified in accordance, for example, with a request to write data to the first data object. The modified copy is stored in a second memory block, and the first data object is mapped to the second memory block.
摘要翻译：重定向数据对象，如文件块范围。数据对象可以从第一存储器块重定向到第二存储器块，其中第二存储器块包括第一存储块的修改数据的副本。响应于修改数据对象的数据的请求可能发生重定向。重定向保留存储在第一存储器块中的数据对象的先前版本，以便在需要时恢复数据对象。在一个实施例中，第一数据对象被映射到第一存储器块。创建第一存储器块的数据内容的副本。此后，根据例如向第一数据对象写入数据的请求来修改拷贝内的数据。修改的副本存储在第二存储器块中，并且第一数据对象被映射到第二存储器块。

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