公开(公告)号：US12206734B2

公开(公告)日：2025-01-21

申请号：US17567182

申请日：2022-01-03

Applicant: NetApp Inc.

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

IPC: G06F3/00 ,  G06F3/06 ,  G06F11/20 ,  G06F16/178 ,  G06F16/182 ,  H04L67/1095 ,  H04L67/1097

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：US12050623B2

公开(公告)日：2024-07-30

申请号：US18094533

申请日：2023-01-09

Applicant: NetApp Inc.

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

IPC: G06F16/27 ,  G06F11/20 ,  H04L47/70 ,  H04L65/40 ,  H04L67/1074 ,  H04L67/1095 ,  H04L67/568

CPC classification number: G06F16/275 ,  H04L47/828 ,  H04L67/1078 ,  H04L67/1095 ,  H04L67/568 ,  G06F11/20 ,  G06F11/2094 ,  G06F16/27 ,  G06F2201/82 ,  H04L65/40

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.

公开(公告)号：US11907116B2

公开(公告)日：2024-02-20

申请号：US17733078

申请日：2022-04-29

Applicant: NetApp Inc.

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

IPC: G06F12/02

CPC classification number: G06F12/0253 ,  G06F2212/702 ,  G06F2212/7205

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：US20230259528A1

公开(公告)日：2023-08-17

申请号：US18094533

申请日：2023-01-09

Applicant: NetApp Inc.

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

IPC: G06F16/27 ,  H04L67/1095 ,  H04L47/70 ,  H04L67/1074 ,  H04L67/568

CPC classification number: G06F16/275 ,  H04L67/1095 ,  H04L47/828 ,  H04L67/1078 ,  H04L67/568 ,  G06F16/27 ,  G06F11/20

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.

公开(公告)号：US20230137443A1

公开(公告)日：2023-05-04

申请号：US17729885

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 ,  G06F9/50

Abstract: Methods and systems for Vserver migration are provided. One method includes executing a transfer phase of a migrate operation for migrating a Vserver of a source cluster to a destination cluster, using asynchronous baseline transfer to transfer a plurality of source storage volumes configured in a consistency group (CG) for the migrate operation to a plurality of destination storage volumes of a destination cluster; updating a state of each of the plurality of source storage volumes to a sync state indicating completion of a pre-commit phase of the migrate operation to initiate a commit phase of the migrate operation; and generating a snapshot of the plurality of destination storage volumes for performing data integrity checks between data stored at the source cluster and migrated data at destination cluster, after completing a commit phase of the migrate operation.

公开(公告)号：US11341101B2

公开(公告)日：2022-05-24

申请号：US16868671

申请日：2020-05-07

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：US11218539B2

公开(公告)日：2022-01-04

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: G06F11/28 ,  H04L29/08 ,  G06F16/178 ,  G06F16/182 ,  G06F3/06 ,  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：US10452489B2

公开(公告)日：2019-10-22

申请号：US15658112

申请日：2017-07-24

Applicant: NetApp, Inc.

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

IPC: G06F11/14 ,  G06F11/20 ,  G06F11/16 ,  G06F11/00

Abstract: A distributed storage system replicates data for a primary logical storage object on a primary node of the storage system to a secondary logical storage object on a secondary node on the distributed storage system. Failures in writing data to the primary logical storage object or failures in the replication of the data to the secondary logical storage object can cause data that should be synchronized to become divergent. In cases where the data may be divergent, reconciliation operations can be performed to resynchronize the data.

公开(公告)号：US20180217771A1

公开(公告)日：2018-08-02

申请号：US15933556

申请日：2018-03-23

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：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。