公开(公告)号：US09471259B2

公开(公告)日：2016-10-18

申请号：US14166501

申请日：2014-01-28

Applicant: NetApp, Inc.

Inventor： Atul Goel ,  Kyle Sterling ,  Todd Mills

IPC: G06F11/00 ,  G06F3/06 ,  G06F11/20

CPC classification number: G06F3/0689 ,  G06F3/0605 ,  G06F3/0619 ,  G06F3/0637 ,  G06F3/0644 ,  G06F3/067 ,  G06F11/00 ,  G06F11/2089 ,  G06F11/2092 ,  G06F11/2094 ,  G06F2201/805 ,  G06F2212/1052

Abstract: A shared storage architecture is described for coordinating management of a shared storage between nodes of a network storage system. In various embodiments, the shared storage is partitioned into and different partitions are assigned to different nodes of the network storage system. The shared storage architecture provides techniques for asserting reservations on the shared storage, managing state of the shared storage, and implementing various configurations of the network storage system using the shared storage.

Abstract translation: 描述了用于协调网络存储系统的节点之间的共享存储的管理的共享存储架构。 在各种实施例中，将共享存储器分区并将不同的分区分配给网络存储系统的不同节点。 共享存储架构提供了用于在共享存储上断言预留，管理共享存储的状态以及使用共享存储来实现网络存储系统的各种配置的技术。

公开(公告)号：US20140164825A1

公开(公告)日：2014-06-12

申请号：US14087319

申请日：2013-11-22

Applicant: NetApp, Inc.

Inventor： Tomislav Grcanac ,  Atul Goel ,  Jagadish Vasudeva ,  Gururaj Mj

IPC: G06F11/10

CPC classification number: G06F11/1088 ,  G06F11/1092 ,  G06F2211/104 ,  G06F2211/1088

Abstract: A data access request is received specifying a data block stored in a stripe of a parity group that includes a plurality of data storage devices to store data blocks and a parity storage device to store parity information for the data. The stripe includes a data block from each of the plurality of data storage devices and the stripe includes a parity block from the parity storage device. An error is detected in the data block specified by the data access request. The error is identified as a lost write error for the data block or a lost write error for the parity block. Identifying the error includes comparing a first storage device signature stored in a metadata field associated with the data block to a second storage device signature stored in a label block identifying a data storage device where the data block is stored.

Abstract translation: 接收指定存储在奇偶校验组的条带中的数据块的数据访问请求，所述奇偶校验组包括用于存储数据块的多个数据存储设备和用于存储数据的奇偶校验信息的奇偶校验存储设备。 条带包括来自多个数据存储设备中的每一个的数据块，并且条带包括来自奇偶校验存储设备的奇偶校验块。 在数据访问请求指定的数据块中检测到错误。 该错误被识别为数据块的丢失写入错误或奇偶校验块的丢失写入错误。 识别错误包括将存储在与数据块相关联的元数据字段中的第一存储设备签名与存储在标识存储数据块的数据存储设备的标签块中的第二存储设备签名进行比较。

公开(公告)号：US20130304987A1

公开(公告)日：2013-11-14

申请号：US13867850

申请日：2013-04-22

Applicant: NetApp, Inc.

Inventor： Atul Goel

IPC: G06F12/00

CPC classification number: G06F12/00 ,  G06F11/1076 ,  G06F2211/1028

Abstract: A parity pattern defines a repeated distribution of parity blocks within a distributed parity disk array (“DPDA”). The parity pattern identifies on which disks the parity block or blocks for a stripe are located. When a new disk is added to the DPDA, the parity pattern is modified so that the distribution of parity blocks within the parity pattern is even. Parity blocks within the DPDA are then redistributed to conform with the modified parity pattern.

Abstract translation: 奇偶校验模式定义了分布式奇偶校验磁盘阵列（“DPDA”）内奇偶校验块的重复分布。 奇偶校验模式标识了条带的奇偶校验块或块所在的磁盘。 当新的磁盘被添加到DPDA时，奇偶校验模式被修改，使得奇偶校验模式内的奇偶校验块的分布是均匀的。 然后将DPDA中的奇偶校验块重新分配，以符合修改的奇偶校验模式。

公开(公告)号：US20220083232A1

公开(公告)日：2022-03-17

申请号：US17486160

申请日：2021-09-27

Applicant: NetApp Inc.

Inventor： Ravikanth Dronamraju ,  Shivali Gupta ,  Kyle Sterling ,  Atul Goel

IPC: G06F3/06 ,  G06F12/02 ,  G06F12/0868

Abstract: A method, non-transitory computer readable medium, and device that assists with reducing memory fragmentation in solid state devices includes identifying an allocation area within an address range to write data from a cache. Next, the identified allocation area is determined for including previously stored data. The previously stored data is read from the identified allocation area when it is determined that the identified allocation area comprises previously stored data. Next, both the write data from the cache and the read previously stored data are written back into the identified allocation area sequentially through the address range.

公开(公告)号：US10929022B2

公开(公告)日：2021-02-23

申请号：US15137542

申请日：2016-04-25

Applicant: NetApp, Inc.

Inventor： Atul Goel ,  Ling Zheng ,  Prahlad Purohit

IPC: G06F3/06

Abstract: A technique efficiently determines accurate storage space savings reported to a host coupled to a reference-counted storage system that employs de-duplication and compression, wherein the storage space savings relate to snapshots and/or clones supported by the storage system. The snapshot/clone may be represented as an independent volume, and embodied as a respective read-only copy (snapshot) or read-write copy (clone) of a parent volume. Metadata is illustratively organized as one or more multi-level dense trees, wherein each level of each dense tree includes volume metadata entries for storing the metadata. The metadata is illustratively embodied as mappings from LBAs of a LUN to extent keys. Space adjustment counters, such as clone space adjustment (CSA) and diverged space adjustment (DSA) counters, may be employed when determining the storage space savings. The CSA counter is equal to the sum of mapped storage space across all levels of a dense tree. The DSA counter for the clone and for the snapshot equals the total mapped storage space in the level. The storage space savings may be determined by computing a value equal to the addition of the CSA counter to the total amount of data and metadata written to the LUN minus the DSA counters and, thereafter, dividing the value by the total amount of de-duplicated and compressed data for the LUN that is physically stored.

公开(公告)号：US20200019321A1

公开(公告)日：2020-01-16

申请号：US16584025

申请日：2019-09-26

Applicant: NetApp Inc.

Inventor： Ravikanth Dronamraju ,  Shivali Gupta ,  Kyle Sterling ,  Atul Goel

IPC: G06F3/06 ,  G06F12/02 ,  G06F12/0868

Abstract: A method, non-transitory computer readable medium, and device that assists with reducing memory fragmentation in solid state devices includes identifying an allocation area within an address range to write data from a cache. Next, the identified allocation area is determined for including previously stored data. The previously stored data is read from the identified allocation area when it is determined that the identified allocation area comprises previously stored data. Next, both the write data from the cache and the read previously stored data are written back into the identified allocation area sequentially through the address range.

公开(公告)号：US20150212760A1

公开(公告)日：2015-07-30

申请号：US14166501

申请日：2014-01-28

Applicant: NetApp, Inc.

Inventor： Atul Goel ,  Kyle Sterling ,  Todd Mills

IPC: G06F3/06 ,  G06F11/20 ,  G06F12/14

CPC classification number: G06F3/0689 ,  G06F3/0605 ,  G06F3/0619 ,  G06F3/0637 ,  G06F3/0644 ,  G06F3/067 ,  G06F11/00 ,  G06F11/2089 ,  G06F11/2092 ,  G06F11/2094 ,  G06F2201/805 ,  G06F2212/1052

Abstract: A shared storage architecture is described for coordinating management of a shared storage between nodes of a network storage system. In various embodiments, the shared storage is partitioned into and different partitions are assigned to different nodes of the network storage system. The shared storage architecture provides techniques for asserting reservations on the shared storage, managing state of the shared storage, and implementing various configurations of the network storage system using the shared storage.

Abstract translation: 描述了用于协调网络存储系统的节点之间的共享存储的管理的共享存储架构。 在各种实施例中，将共享存储器分区并将不同的分区分配给网络存储系统的不同节点。 共享存储架构提供了用于在共享存储上断言预留，管理共享存储的状态以及使用共享存储来实现网络存储系统的各种配置的技术。

公开(公告)号：US09021335B2

公开(公告)日：2015-04-28

申请号：US14053060

申请日：2013-10-14

Applicant: NetApp Inc.

Inventor： Atul Goel

IPC: G06F11/00 ,  G06F11/07 ,  G06F11/10 ,  G06F11/16 ,  G06F11/20

CPC classification number: G06F11/0709 ,  G06F11/1088 ,  G06F11/1662 ,  G06F11/2094 ,  G11C7/1006

Abstract: Some aspects of the disclosure relate to a data storage system that includes multiple memory device storage devices. If a memory device of a memory device array fails within a first data storage device, some portions of the lost or corrupted data from the failed memory device are recovered by reading them from a second data storage device. Other portions of the lost or corrupted data from the failed memory device are recovered from parity information in the first data storage device.

Abstract translation: 本公开的一些方面涉及包括多个存储器设备存储设备的数据存储系统。 如果存储设备阵列的存储设备在第一数据存储设备内发生故障，则通过从第二数据存储设备读取来自故障存储设备的丢失或损坏的数据的一些部分被恢复。 来自故障存储设备的丢失或损坏的数据的其他部分从第一数据存储设备中的奇偶校验信息中恢复。

公开(公告)号：US20170308305A1

公开(公告)日：2017-10-26

申请号：US15137542

申请日：2016-04-25

Applicant: NetApp, Inc.

Inventor： Atul Goel ,  Ling Zheng ,  Prahlad Purohit

IPC: G06F3/06

CPC classification number: G06F3/0608 ,  G06F3/0641 ,  G06F3/065 ,  G06F3/0665 ,  G06F3/067

Abstract: A technique efficiently determines accurate storage space savings reported to a host coupled to a reference-counted storage system that employs de-duplication and compression, wherein the storage space savings relate to snapshots and/or clones supported by the storage system. The snapshot/clone may be represented as an independent volume, and embodied as a respective read-only copy (snapshot) or read-write copy (clone) of a parent volume. Metadata is illustratively organized as one or more multi-level dense trees, wherein each level of each dense tree includes volume metadata entries for storing the metadata. The metadata is illustratively embodied as mappings from LBAs of a LUN to extent keys. Space adjustment counters, such as clone space adjustment (CSA) and diverged space adjustment (DSA) counters, may be employed when determining the storage space savings. The CSA counter is equal to the sum of mapped storage space across all levels of a dense tree. The DSA counter for the clone and for the snapshot equals the total mapped storage space in the level. The storage space savings may be determined by computing a value equal to the addition of the CSA counter to the total amount of data and metadata written to the LUN minus the DSA counters and, thereafter, dividing the value by the total amount of de-duplicated and compressed data for the LUN that is physically stored.

公开(公告)号：US08910030B2

公开(公告)日：2014-12-09

申请号：US13867850

申请日：2013-04-22

Applicant: NetApp, Inc.

Inventor： Atul Goel

IPC: G11C29/42 ,  G06F12/00 ,  G06F11/10 ,  G11C29/54

CPC classification number: G06F12/00 ,  G06F11/1076 ,  G06F2211/1028

Abstract: A parity pattern defines a repeated distribution of parity blocks within a distributed parity disk array (“DPDA”). The parity pattern identifies on which disks the parity block or blocks for a stripe are located. When a new disk is added to the DPDA, the parity pattern is modified so that the distribution of parity blocks within the parity pattern is even. Parity blocks within the DPDA are then redistributed to conform with the modified parity pattern.

Abstract translation: 奇偶校验模式定义了分布式奇偶校验磁盘阵列（“DPDA”）内奇偶校验块的重复分布。 奇偶校验模式标识了条带的奇偶校验块或块所在的磁盘。 当新的磁盘被添加到DPDA时，奇偶校验模式被修改，使得奇偶校验模式内的奇偶校验块的分布是均匀的。 然后将DPDA中的奇偶校验块重新分配，以符合修改的奇偶校验模式。