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1. 发明授权

US08639878B1 Providing redundancy in a storage system 有权
标题翻译：在存储系统中提供冗余
公开(公告)号：US08639878B1
公开(公告)日：2014-01-28
申请号：US13204070
申请日：2011-08-05
申请人： Paresh Chatterjee , Ajit Narayanan , Narayanan Balakrishnan , Vijayarankan Muthirisavenugopal
发明人： Paresh Chatterjee , Ajit Narayanan , Narayanan Balakrishnan , Vijayarankan Muthirisavenugopal
IPC分类号： G06F12/00 , G06F13/00 , G06F13/28
CPC分类号： G06F11/2069 , G06F11/1096
摘要： A system, method, apparatus, and computer-readable medium are described for providing redundancy in a storage system. According to one method, maps are generated and stored that define stripe patterns for storing data on the storage nodes of a storage cluster. The maps are defined such that when a new storage node is added to the cluster, no movement of data occurs between two storage nodes that existed in the cluster prior to the addition of the new storage node during re-striping, and such that the data stored on each storage node is mirrored on another storage node. Storage nodes may also be designated as an owner or a peer for each storage zone. Input/output operations received at an owner node are fielded directly and mirrored to the peer node, while input/output operations received at a peer node are redirected to the owner node for processing.
摘要翻译：描述了用于在存储系统中提供冗余的系统，方法，装置和计算机可读介质。根据一种方法，生成和存储映射，其定义用于在存储集群的存储节点上存储数据的条带模式。定义这些映射，使得当将新的存储节点添加到集群时，在重新分段期间在添加新的存储节点之前不存在存在于集群中的两个存储节点之间的数据移动，并且使得数据存储在每个存储节点上的镜像在另一个存储节点上镜像。存储节点也可以被指定为每个存储区的所有者或对等体。在所有者节点处接收到的输入/输出操作被直接映射并且镜像到对等节点，而在对等节点处接收到的输入/输出操作被重定向到所有者节点进行处理。

2. 发明授权

US08117158B1 Method, system, apparatus, and computer-readable medium for taking and managing snapshots of a storage volume 有权
公开(公告)号：US08117158B1
公开(公告)日：2012-02-14
申请号：US12042710
申请日：2008-03-05
申请人： Paresh Chatterjee , Vijayarankan Muthirisavenugopal , Srikumar Subramanian , Ajit Narayanan
发明人： Paresh Chatterjee , Vijayarankan Muthirisavenugopal , Srikumar Subramanian , Ajit Narayanan
IPC分类号： G06F7/00 , G06F17/00
CPC分类号： G06F11/1451 , G06F2201/84 , Y10S707/99955
摘要： A method, system, apparatus, and computer-readable medium are provided for taking snapshots of a storage volume. According to aspects of one method, each snapshot is represented as a unique sequence number. Every fresh write access to a volume in a new snapshot lifetime is allocated a new section in the disk, called a provision, which is labeled with the sequence number. Read-modify-write operations are performed on a sub-provision level at the granularity of a chunk. Because each provision contains chunks with valid data and chunks with invalid data, a bitmap is utilized to identify the valid and invalid chunks with each provision. Provisions corresponding to different snapshots are arranged in a linked list. Branches from the linked list can be created for storing writable snapshots. Provisions may also be deleted and rolled back by manipulating the contents of the linked lists.

3. 发明授权

US07953929B1 Expanding the storage capacity of a virtualized data storage system 有权
标题翻译：扩展虚拟化数据存储系统的存储容量
公开(公告)号：US07953929B1
公开(公告)日：2011-05-31
申请号：US12721900
申请日：2010-03-11
申请人： Paresh Chatterjee , Narayanan Balakrishnan , Ajit Narayanan , Vijayarankan Muthirisavenugopal
发明人： Paresh Chatterjee , Narayanan Balakrishnan , Ajit Narayanan , Vijayarankan Muthirisavenugopal
IPC分类号： G06F12/00 , G06F11/00 , G06F17/30 , G06F15/167 , G06F15/177
CPC分类号： G06F3/0647 , G06F3/0607 , G06F3/0617 , G06F3/067 , Y10S707/99955
摘要： A system, method, apparatus, and computer-readable medium are provided for expanding the data storage capacity of a virtualized storage system, such as a storage cluster. According to one method, maps are generated and stored that define a stripe pattern for storing data on the storage nodes of a storage cluster. The stripe pattern for each map is defined such that when a storage node is added to a cluster and the data is re-striped according to the new map, only the data that will subsequently reside in the new storage node is moved to the new storage cluster during re-striping. The stripe pattern may be further defined so that during re-striping no movement of data occurs between two storage nodes that existed in the cluster prior to the addition of the new storage node. The stripe pattern may be further defined such that during re-striping an equal amount of data is moved from each of the storage nodes that existed in the cluster prior to the addition of the new storage node to the new storage node.
摘要翻译：提供了一种系统，方法，装置和计算机可读介质，用于扩展诸如存储集群之类的虚拟存储系统的数据存储容量。根据一种方法，生成和存储映射，其定义用于在存储集群的存储节点上存储数据的条带模式。定义每个地图的条纹图案，使得当将存储节点添加到群集并且根据新地图重新条带数据时，仅将随后驻留在新存储节点中的数据被移动到新存储集群在重新条纹期间。可以进一步限定条纹图案，使得在重新条纹化期间，在添加新存储节点之前，不存在存在于集群中的两个存储节点之间的数据移动。可以进一步限定条纹图案，使得在重新条纹化期间，在将新存储节点添加到新存储节点之前，等量的数据从簇中存在的每个存储节点移动。

4. 发明授权

US07373366B1 Method, system, apparatus, and computer-readable medium for taking and managing snapshots of a storage volume 有权
标题翻译：用于采集和管理存储卷的快照的方法，系统，设备和计算机可读介质
公开(公告)号：US07373366B1
公开(公告)日：2008-05-13
申请号：US11255146
申请日：2005-10-20
申请人： Paresh Chatterjee , Vijayarankan Muthirisavenugopal , Srikumar Subramanian , Ajit Narayanan
发明人： Paresh Chatterjee , Vijayarankan Muthirisavenugopal , Srikumar Subramanian , Ajit Narayanan
IPC分类号： G06F12/00 , G06F17/30
CPC分类号： G06F11/1451 , G06F2201/84 , Y10S707/99955
摘要： A method, system, apparatus, and computer-readable medium are provided for taking snapshots of a storage volume. According to aspects of one method, each snapshot is represented as a unique sequence number. Every fresh write access to a volume in a new snapshot lifetime is allocated a new section in the disk, called a provision, which is labeled with the sequence number. Read-modify-write operations are performed on a sub-provision level at the granularity of a chunk. Because each provision contains chunks with valid data and chunks with invalid data, a bitmap is utilized to identify the valid and invalid chunks with each provision. Provisions corresponding to different snapshots are arranged in a linked list. Branches from the linked list can be created for storing writable snapshots. Provisions may also be deleted and rolled back by manipulating the contents of the linked lists.
摘要翻译：提供了一种用于拍摄存储卷的快照的方法，系统，装置和计算机可读介质。根据一个方法的方面，每个快照被表示为唯一的序列号。在新的快照生命周期中，对每个新卷的读取访问将在磁盘中分配一个新的部分，称为配置，标记为序列号。读取 - 修改 - 写入操作是在子级别上以块的粒度执行的。由于每个条款包含有有效数据的块和无效数据的块，因此利用位图来识别每个条款的有效和无效的块。对应于不同快照的规定被排列在链表中。链接分支可以创建用于存储可写快照。也可以通过操纵链表的内容来删除和回滚条款。

5. 发明授权

US07996608B1 Providing redundancy in a storage system 有权
标题翻译：在存储系统中提供冗余
公开(公告)号：US07996608B1
公开(公告)日：2011-08-09
申请号：US11551291
申请日：2006-10-20
申请人： Paresh Chatterjee , Ajit Narayanan , Narayanan Balakrishnan , Vijayarankan Muthirisavenugopal
发明人： Paresh Chatterjee , Ajit Narayanan , Narayanan Balakrishnan , Vijayarankan Muthirisavenugopal
IPC分类号： G06F12/00 , G06F13/00 , G06F13/28
CPC分类号： G06F11/2069 , G06F11/1096
摘要： A system, method, apparatus, and computer-readable medium are described for providing redundancy in a storage system. According to one method, maps are generated and stored that define stripe patterns for storing data on the storage nodes of a storage cluster. The maps are defined such that when a new storage node is added to the cluster, no movement of data occurs between two storage nodes that existed in the cluster prior to the addition of the new storage node during re-striping, and such that the data stored on each storage node is mirrored on another storage node. Storage nodes may also be designated as an owner or a peer for each storage zone. Input/output operations received at an owner node are fielded directly and mirrored to the peer node, while input/output operations received at a peer node are redirected to the owner node for processing.
摘要翻译：描述了用于在存储系统中提供冗余的系统，方法，装置和计算机可读介质。根据一种方法，生成和存储映射，其定义用于在存储集群的存储节点上存储数据的条带模式。定义这些映射，使得当将新的存储节点添加到集群时，在重新分段期间在添加新的存储节点之前不存在存在于集群中的两个存储节点之间的数据移动，并且使得数据存储在每个存储节点上的镜像在另一个存储节点上镜像。存储节点也可以被指定为每个存储区的所有者或对等体。在所有者节点处接收到的输入/输出操作被直接映射并且镜像到对等节点，而在对等节点处接收到的输入/输出操作被重定向到所有者节点进行处理。

6. 发明授权

US08260744B1 Method, system, apparatus, and computer-readable medium for taking and managing snapshots of a storage volume 有权
标题翻译：用于采集和管理存储卷的快照的方法，系统，设备和计算机可读介质
公开(公告)号：US08260744B1
公开(公告)日：2012-09-04
申请号：US12042705
申请日：2008-03-05
申请人： Paresh Chatterjee , Vijayarankan Muthirisavenugopal , Srikumar Subramanian , Ajit Narayanan
发明人： Paresh Chatterjee , Vijayarankan Muthirisavenugopal , Srikumar Subramanian , Ajit Narayanan
IPC分类号： G06F7/00 , G06F17/00
CPC分类号： G06F11/1451 , G06F2201/84 , Y10S707/99955
摘要： A method, system, apparatus, and computer-readable medium are provided for taking snapshots of a storage volume. According to aspects of one method, each snapshot is represented as a unique sequence number. Every fresh write access to a volume in a new snapshot lifetime is allocated a new section in the disk, called a provision, which is labeled with the sequence number. Read-modify-write operations are performed on a sub-provision level at the granularity of a chunk. Because each provision contains chunks with valid data and chunks with invalid data, a bitmap is utilized to identify the valid and invalid chunks with each provision. Provisions corresponding to different snapshots are arranged in a linked list. Branches from the linked list can be created for storing writable snapshots. Provisions may also be deleted and rolled back by manipulating the contents of the linked lists.
摘要翻译：提供了一种用于拍摄存储卷的快照的方法，系统，装置和计算机可读介质。根据一个方法的方面，每个快照被表示为唯一的序列号。在新的快照生命周期中，对每个新卷的读取访问将在磁盘中分配一个新的部分，称为配置，标记为序列号。读取 - 修改 - 写入操作是在子级别上以块的粒度执行的。由于每个条款包含有有效数据的块和无效数据的块，因此利用位图来识别每个条款的有效和无效的块。对应于不同快照的规定被排列在链表中。链接分支可以创建用于存储可写快照。也可以通过操纵链表的内容来删除和回滚条款。

7. 发明授权

US07991969B1 Method, system, apparatus, and computer-readable medium for improving disk array performance 有权
标题翻译：用于提高磁盘阵列性能的方法，系统，设备和计算机可读介质
公开(公告)号：US07991969B1
公开(公告)日：2011-08-02
申请号：US12885534
申请日：2010-09-19
申请人： Paresh Chatterjee , Vijayarankan Muthirisavenugopal , Ajit Narayanan
发明人： Paresh Chatterjee , Vijayarankan Muthirisavenugopal , Ajit Narayanan
IPC分类号： G06F12/00
CPC分类号： G06F12/0868 , G06F3/0605 , G06F3/0632 , G06F3/0665 , G06F3/0689 , G06F11/1092 , G06F11/1662 , G06F11/2094 , G06F2211/104 , G06F2211/1059 , G06F2212/262
摘要： A method, system, apparatus, and computer-readable medium are provided for improved maintenance of metadata relating to a mass storage array. The metadata may comprise the data structures utilized by a thin provisioning system. When the metadata changes, such as in response to the modification of the underlying data, changed metadata is created in the memory. A parity block is then read from the row of the array where the changed metadata is to be stored. A new parity is calculated for the row using only the old metadata, the changed metadata, and the parity read from the stripe. The old metadata need not be read from disk expressly, as is usually done. Instead, the value that is present in memory before the metadata change is utilized directly to calculate the new parity. The changed metadata and the new parity are then written to the array.
摘要翻译：提供了一种方法，系统，装置和计算机可读介质，用于改进与大容量存储阵列有关的元数据的维护。元数据可以包括由精简配置系统使用的数据结构。当元数据改变时，例如响应于底层数据的修改，在存储器中创建改变的元数据。然后从阵列的行读取一个奇偶校验块，其中将存储更改的元数据。仅使用旧的元数据，更改的元数据和从条带读取的奇偶校验来计算行的新奇偶校验。旧的元数据不需要像通常那样明确地从磁盘中读取。相反，元数据更改之前存在于存储器中的值直接用于计算新的奇偶校验。然后将更改的元数据和新的奇偶校验写入阵列。

8. 发明授权

US07721044B1 Expanding the storage capacity of a virtualized data storage system 有权
标题翻译：扩展虚拟化数据存储系统的存储容量
公开(公告)号：US07721044B1
公开(公告)日：2010-05-18
申请号：US11551274
申请日：2006-10-20
申请人： Paresh Chatterjee , Narayanan Balakrishnan , Ajit Narayanan , Vijayarankan Muthirisavenugopal
发明人： Paresh Chatterjee , Narayanan Balakrishnan , Ajit Narayanan , Vijayarankan Muthirisavenugopal
IPC分类号： G06F12/00 , G06F11/00 , G06F17/30 , G06F15/167 , G06F15/177
CPC分类号： G06F3/0647 , G06F3/0607 , G06F3/0617 , G06F3/067 , Y10S707/99955
摘要： A system, method, apparatus, and computer-readable medium are provided for expanding the data storage capacity of a virtualized storage system, such as a storage cluster. According to one method, maps are generated and stored that define a stripe pattern for storing data on the storage nodes of a storage cluster. The stripe pattern for each map is defined such that when a storage node is added to a cluster and the data is re-striped according to the new map, only the data that will subsequently reside in the new storage node is moved to the new storage cluster during re-striping. The stripe pattern may be further defined so that during re-striping no movement of data occurs between two storage nodes that existed in the cluster prior to the addition of the new storage node. The stripe pattern may be further defined such that during re-striping an equal amount of data is moved from each of the storage nodes that existed in the cluster prior to the addition of the new storage node to the new storage node.
摘要翻译：提供了一种系统，方法，装置和计算机可读介质，用于扩展诸如存储集群之类的虚拟存储系统的数据存储容量。根据一种方法，生成和存储映射，其定义用于在存储集群的存储节点上存储数据的条带模式。定义每个地图的条纹图案，使得当将存储节点添加到群集并且根据新地图重新条带数据时，仅将随后驻留在新存储节点中的数据被移动到新存储集群在重新条纹期间。可以进一步限定条纹图案，使得在重新条纹化期间，在添加新存储节点之前，不存在存在于集群中的两个存储节点之间的数据移动。可以进一步限定条纹图案，使得在重新条纹化期间，在将新存储节点添加到新存储节点之前，等量的数据从簇中存在的每个存储节点移动。

9. 发明授权

US07653836B1 Logging metadata modifications in a data storage system 有权
标题翻译：在数据存储系统中记录元数据修改
公开(公告)号：US07653836B1
公开(公告)日：2010-01-26
申请号：US11450778
申请日：2006-06-09
申请人： Paresh Chatterjee , Ajit Narayanan , Vijayarankan Muthirisavenugopal , Anandh Mahalingam
发明人： Paresh Chatterjee , Ajit Narayanan , Vijayarankan Muthirisavenugopal , Anandh Mahalingam
IPC分类号： G06F11/00
CPC分类号： G06F11/1076 , G06F11/1471 , G06F2211/104
摘要： A method, system, apparatus, and computer-readable medium for logging metadata modifications in a storage system are provided. According to one method, modifications to storage system metadata are detected and described in a log string data structure. The log strings are collected and periodically committed to a mass storage device in the data storage system. The log strings may be collected in a log buffer data structure that includes the collected log strings and one or more unique, constantly increasing timestamps. The time stamps are written at the end of each sector of the log buffer. The log buffer may be committed to the mass storage device when the log buffer is full, when a predefined period of time has elapsed since the previous commitment of the log strings to disk, or in a manner designed to ensure that one write of the log buffer is always outstanding. A logger module is operative to collect the log strings, build the log buffer, and to commit the log buffer to disk.
摘要翻译：提供了用于在存储系统中记录元数据修改的方法，系统，装置和计算机可读介质。根据一种方法，在日志串数据结构中检测和描述对存储系统元数据的修改。日志字符串被收集并定期地提交给数据存储系统中的大容量存储设备。日志字符串可以收集在包括收集的日志字符串和一个或多个唯一的不断增加的时间戳的日志缓冲器数据结构中。时间标记写在日志缓冲区的每个扇区的末尾。日志缓冲区可能会在日志缓冲区已满时被提交到大容量存储设备，这是在从日志字符串先前承诺到磁盘之后经过预定义的时间段时，或者以设计用于确保写入日志的方式缓冲区总是优秀的。记录器模块可用于收集日志字符串，构建日志缓冲区，并将日志缓冲区提交到磁盘。

10. 发明授权

US07987156B1 Method, system, apparatus, and computer-readable medium for taking and managing snapshots of a storage volume 有权
标题翻译：用于采集和管理存储卷的快照的方法，系统，设备和计算机可读介质
公开(公告)号：US07987156B1
公开(公告)日：2011-07-26
申请号：US12042715
申请日：2008-03-05
申请人： Paresh Chatterjee , Vijayarankan Muthirisavenugopal , Srikumar Subramanian , Ajit Narayanan
发明人： Paresh Chatterjee , Vijayarankan Muthirisavenugopal , Srikumar Subramanian , Ajit Narayanan
IPC分类号： G06F7/00
CPC分类号： G06F11/1451 , G06F2201/84 , Y10S707/99955
摘要： A method, system, apparatus, and computer-readable medium are provided for taking snapshots of a storage volume. According to aspects of one method, each snapshot is represented as a unique sequence number. Every fresh write access to a volume in a new snapshot lifetime is allocated a new section in the disk, called a provision, which is labeled with the sequence number. Read-modify-write operations are performed on a sub-provision level at the granularity of a chunk. Because each provision contains chunks with valid data and chunks with invalid data, a bitmap is utilized to identify the valid and invalid chunks with each provision. Provisions corresponding to different snapshots are arranged in a linked list. Branches from the linked list can be created for storing writable snapshots. Provisions may also be deleted and rolled back by manipulating the contents of the linked lists.
摘要翻译：提供了一种用于拍摄存储卷的快照的方法，系统，装置和计算机可读介质。根据一个方法的方面，每个快照被表示为唯一的序列号。在新的快照生命周期中，对每个新卷的读取访问将在磁盘中分配一个新的部分，称为配置，标记为序列号。读取 - 修改 - 写入操作是在子级别上以块的粒度执行的。由于每个条款包含有有效数据的块和无效数据的块，因此利用位图来识别每个条款的有效和无效的块。对应于不同快照的规定被排列在链表中。链接分支可以创建用于存储可写快照。也可以通过操纵链表的内容来删除和回滚条款。

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