公开(公告)号：US20160063083A1

公开(公告)日：2016-03-03

申请号：US14473081

申请日：2014-08-29

Applicant: NetApp, Inc.

Inventor： Yuedong Mu ,  Ching-Yuk Paul Ngan ,  Manoj V. Sundararajan

IPC: G06F17/30 ,  H04L29/08 ,  H04L12/911 ,  G06F11/14

CPC classification number: G06F16/275 ,  G06F11/20 ,  G06F11/2094 ,  G06F16/27 ,  G06F2201/82 ,  H04L29/08 ,  H04L47/828 ,  H04L67/1078 ,  H04L67/1095 ,  H04L67/2842

Abstract: Synchronization metadata is read from non-volatile storage. The synchronization metadata comprises indications of one or more synchronization targets. A synchronization target is a node of a clustered storage system. A synchronization cache is populated with the synchronization metadata. After populating the synchronization cache with at least a portion of the synchronization metadata, a connection to a network is established. After the connection to the network is established, a connection to a first of the one or more synchronization targets is established.

Abstract translation: 从非易失性存储器读取同步元数据。 同步元数据包括一个或多个同步目标的指示。 同步目标是群集存储系统的节点。 使用同步元数据填充同步缓存。 在使用同步元数据的至少一部分填充同步缓存之后，建立到网络的连接。 在建立到网络的连接之后，建立到一个或多个同步目标中的第一个的连接。

公开(公告)号：US20250165349A1

公开(公告)日：2025-05-22

申请号：US19030358

申请日：2025-01-17

Applicant: NetApp, Inc.

Inventor： Rakesh Bhargava M.R. ,  Murali Subramanian ,  Tijin George ,  Ching-Yuk Paul Ngan

IPC: G06F11/14

Abstract: Techniques are provided for volume group backup, volume group restore, and volume group garbage collection for volume groups backed up to an object store. A volume group workflow is implemented to orchestrate individual consistent volume workflows that are separately and individually implemented by nodes hosting constituent volumes of a volume group. The volume group workflow and the individual consistent volume workflows are performed to back up the volume group to the object store, restore a volume group backup from the object store to a restore destination, and/or perform garbage collection on slots of objects storing data unique to a volume group backup to delete.

公开(公告)号：US20230136363A1

公开(公告)日：2023-05-04

申请号：US17729900

申请日：2022-04-26

Applicant: NETAPP, INC.

Inventor： Atul Ramesh Pandit ,  Kalaivani Arumugham ,  Akhil Kaushik ,  Ching-Yuk Paul Ngan ,  Kazunobu Nishime ,  Rakesh Bhargava M R ,  William R. Taylor

IPC: G06F9/455

Abstract: Methods and systems for Vserver migration are provided. One method includes maintaining a state of a migrate operation for migrating a plurality of source storage volumes managed by a source storage virtual machine (Vserver) of a source cluster to a plurality of destination storage volumes of a destination cluster of a networked storage environment; restarting a process at a healthy node of the source cluster or the destination cluster to continue the migrate operation, in response to detecting an unhealthy node at the source cluster or the destination cluster executing the process; retrying a task associated with the migrate operation experiencing intermittent failure for a certain number of times, and upon successful execution, continuing the migration operation; and checking the state of the migrate operation and in response to the state of the migrate operation, continuing the migrate operation or restarting the migration operation.

公开(公告)号：US10949309B2

公开(公告)日：2021-03-16

申请号：US14980428

申请日：2015-12-28

Applicant: NetApp Inc.

Inventor： Vrishali Dattatray Hajare ,  Ripulkumar Hemantbhai Patel ,  Ching-Yuk Paul Ngan ,  Rithin Kumar Shetty

IPC: G06F16/27 ,  G06F11/14 ,  G06F3/06

Abstract: One or more techniques and/or computing devices are provided for snapshot creation. For example, a request may be received to create a snapshot of a first storage object, hosted by a first storage controller, having a synchronous replication relationship with a second storage object hosted by a second storage controller. A coordinator workflow is initialized to issue a drain and hold request to a splitter. Responsive to an indication that the splitter has stopped processing and started queuing incoming write operations and has drained current write operations based upon the drain and hold request, snapshot creation requests are sent to the first storage controller and the second storage controller. Responsive to the first storage controller creating a first snapshot of the first storage object and the second storage controller creating a second snapshot of the second storage object, the splitter may be resumed to process write operations.

公开(公告)号：US10852961B2

公开(公告)日：2020-12-01

申请号：US16364496

申请日：2019-03-26

Applicant: NetApp Inc.

Inventor： Manoj V. Sundararajan ,  Ching-Yuk Paul Ngan ,  Yuedong Mu ,  Susan M. Coatney

IPC: G06F3/06

Abstract: A primary write request that is to modify a primary portion of primary data stored in a primary storage node is received. The primary write request is to be replicated to create a current secondary write request. The current secondary write request is to modify a current secondary portion of secondary data that is stored in a secondary storage node. A current data range of the current secondary portion is determined. A determination is made of whether a previous secondary write request is in process of modifying a previous data range that at least partially overlaps with a current data range of the current secondary portion. Execution of the primary write request is suspended, until the previous secondary write request has completed updating the secondary storage node.

公开(公告)号：US10684994B2

公开(公告)日：2020-06-16

申请号：US14865442

申请日：2015-09-25

Applicant: NetApp Inc.

Inventor： Ching-Yuk Paul Ngan ,  Kanwaldeep Singh ,  Yuedong Mu ,  Manoj Kumar V Sundararajan

IPC: G06F16/00 ,  G06F16/178 ,  G06F11/14 ,  G06F11/20

Abstract: One or more techniques and/or computing devices are provided for data synchronization. For example, an in-flight log may be maintained to track storage operations that are received by a first storage node, but have not been committed to both first storage of the first storage node and second storage of a second storage node that has a replication relationship, such as a disaster recovery relationship, with the first storage node. A dirty region log may be maintained to track regions within the first storage that have been modified by storage operations that have not been replicated to the second storage. Accordingly, a catchup synchronization phase (e.g., asynchronous replication by a resync scanner) may be performed to replicate storage operations (e.g., replicate data within dirty regions of the first storage that were modified by such storage operations) to the second storage until the first storage and the second storage are synchronized.

公开(公告)号：US20200084271A1

公开(公告)日：2020-03-12

申请号：US16682056

申请日：2019-11-13

Applicant: NetApp Inc.

Inventor： Paul Anthony Powell ,  Akhil Kaushik ,  Srikumar Natarajan ,  Ching-Yuk Paul Ngan

IPC: H04L29/08 ,  G06F11/20 ,  G06F16/182 ,  G06F16/178 ,  G06F3/06

Abstract: One or more techniques and/or computing devices are provided for implementing synchronous replication. For example, a synchronous replication relationship may be established between a first storage controller hosting local storage and a second storage controller hosting remote storage (e.g., replication may be specified at a file, logical unit number (LUN), or any other level of granularity). Data operations and offloaded operations may be implemented in parallel upon the local storage and the remote storage. Error handling operations may be implemented upon the local storage and implement in parallel as a best effort on the remote storage, and a reconciliation may be performed to identify any data divergence from the best effort parallel implementation. Storage area network (SAN) operations may be implemented upon the local storage, and upon local completion may be remotely implemented upon the remote storage.

公开(公告)号：US10523751B2

公开(公告)日：2019-12-31

申请号：US15850754

申请日：2017-12-21

Applicant: NetApp Inc.

Inventor： Paul Anthony Powell ,  Akhil Kaushik ,  Srikumar Natarajan ,  Ching-Yuk Paul Ngan

IPC: G06F12/00 ,  H04L29/08 ,  G06F16/178 ,  G06F16/182 ,  G06F11/20

Abstract: One or more techniques and/or computing devices are provided for implementing synchronous replication. For example, a synchronous replication relationship may be established between a first storage controller hosting local storage and a second storage controller hosting remote storage (e.g., replication may be specified at a file, logical unit number (LUN), or any other level of granularity). Data operations and offloaded operations may be implemented in parallel upon the local storage and the remote storage. Error handling operations may be implemented upon the local storage and implement in parallel as a best effort on the remote storage, and a reconciliation may be performed to identify any data divergence from the best effort parallel implementation. Storage area network (SAN) operations may be implemented upon the local storage, and upon local completion may be remotely implemented upon the remote storage.

公开(公告)号：US20190220206A1

公开(公告)日：2019-07-18

申请号：US16364496

申请日：2019-03-26

Applicant: NetApp Inc.

Inventor： Manoj V. Sundararajan ,  Ching-Yuk Paul Ngan ,  Yuedong Mu ,  Susan M. Coatney

IPC: G06F3/06

CPC classification number: G06F3/0619 ,  G06F3/065 ,  G06F3/067

Abstract: A primary write request that is to modify a primary portion of primary data stored in a primary storage node is received. The primary write request is to be replicated to create a current secondary write request. The current secondary write request is to modify a current secondary portion of secondary data that is stored in a secondary storage node. A current data range of the current secondary portion is determined. A determination is made of whether a previous secondary write request is in process of modifying a previous data range that at least partially overlaps with a current data range of the current secondary portion. Execution of the primary write request is suspended, until the previous secondary write request has completed updating the secondary storage node.

公开(公告)号：US09959064B2

公开(公告)日：2018-05-01

申请号：US15588726

申请日：2017-05-08

Applicant: NetApp Inc.

Inventor： Manoj V. Sundararajan ,  Ching-Yuk Paul Ngan ,  Yuedong Mu ,  Susan M. Coatney

IPC: G06F3/06

CPC classification number: G06F3/0619 ,  G06F3/065 ,  G06F3/067

Abstract: A primary write request that is to modify a primary portion of primary data stored in a primary storage node is received. The primary write request is to be replicated to create a current secondary write request. The current secondary write request is to modify a current secondary portion of secondary data that is stored in a secondary storage node. A current data range of the current secondary portion is determined. A determination is made of whether a previous secondary write request is in process of modifying a previous data range that at least partially overlaps with a current data range of the current secondary portion. Execution of the primary write request is suspended, until the previous secondary write request has completed updating the secondary storage node.