公开(公告)号：US20160127467A1

公开(公告)日：2016-05-05

申请号：US14528166

申请日：2014-10-30

Applicant: NETAPP, INC.

Inventor： Paul Yuedong Mu ,  Manoj Sundararajan ,  Paul Ngan

IPC: H04L29/08 ,  G06F17/30

CPC classification number: H04L67/1097

Abstract: Various embodiments are generally directed to techniques for reducing the time required for a node to take over for a failed node or to boot. An apparatus includes an access component to retrieve a metadata from a storage device coupled to a first D-module of a first node during boot, the metadata generated from a first mutable metadata portion and an immutable metadata portion, and the first metadata specifying a first address of a second D-module of a second node; a replication component to contact the second data storage module at the first address; and a generation component to, in response to failure of the contact, request a second mutable metadata portion from a N-module of the first node and generate a second metadata from the second mutable metadata portion and the immutable metadata portion, the second mutable metadata portion specifying a second address of the second D-module.

Abstract translation: 各种实施例通常涉及用于减少节点接管故障节点或引导所需的时间的技术。 一种装置包括一个访问组件，用于从引导期间耦合到第一节点的第一D模块的存储设备检索元数据，从第一可变元数据部分和不可变元数据部分生成的元数据，以及指定第一元数据的第一元数据 第二节点的第二D模块的地址; 复制组件，用于在第一地址处联系第二数据存储模块; 以及生成组件，响应于所述联系人的失败，从所述第一节点的N模块请求第二可变元数据部分，并且从所述第二可变元数据部分和所述不可变元数据部分生成第二元数据，所述第二可变元数据 指定第二D模块的第二地址的部分。

公开(公告)号：US20240283845A1

公开(公告)日：2024-08-22

申请号：US18648968

申请日：2024-04-29

Applicant: NetApp, Inc.

Inventor： Manoj Sundararajan ,  Paul Yuedong Mu ,  Paul Ngan

IPC: H04L67/1097 ,  G06F11/20 ,  H04L67/1095 ,  H04L69/22

CPC classification number: H04L67/1097 ,  G06F11/2071 ,  G06F11/2089 ,  H04L67/1095 ,  H04L69/22 ,  G06F11/2092 ,  G06F11/2097

Abstract: Various embodiments are directed to techniques for coordinating at least partially parallel performance and cancellation of data access commands between nodes of a storage cluster system. An apparatus may include a processor component of a first node coupled to a first storage device storing client device data; an access component to perform replica data access commands of replica command sets on the client device data, each replica command set assigned a set ID; a communications component to analyze a set ID included in a network packet to determine whether a portion of a replica command set in the network packet is redundant, and to reassemble the replica command set from the portion based if the portion is not redundant; and an ordering component to provide the communications component with set IDs of replica command sets of which the access component has fully performed the set of replica data access commands.

公开(公告)号：US20230016882A1

公开(公告)日：2023-01-19

申请号：US17947339

申请日：2022-09-19

Applicant: NetApp Inc.

Inventor： Paul Yuedong Mu ,  Paul Ngan ,  Manoj Sundararajan

IPC: G06F11/00 ,  G06F11/20

Abstract: Various embodiments are generally directed an apparatus and method for receiving information to write on a clustered system comprising at least a first cluster and a second cluster, determining that a failure event has occurred on the clustered system creating unsynchronized information, the unsynchronized information comprising at least one of inflight information and dirty region information, and performing a resynchronization operation to synchronize the unsynchronized information on the first cluster and the second cluster based on log information in at least one of an inflight tracker log for the inflight information and a dirty region log for the dirty region information.

公开(公告)号：US11449373B2

公开(公告)日：2022-09-20

申请号：US16459982

申请日：2019-07-02

Applicant: NetApp Inc.

Inventor： Paul Yuedong Mu ,  Paul Ngan ,  Manoj Sundararajan

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

Abstract: Various embodiments are generally directed an apparatus and method for receiving information to write on a clustered system comprising at least a first cluster and a second cluster, determining that a failure event has occurred on the clustered system creating unsynchronized information, the unsynchronized information comprising at least one of inflight information and dirty region information, and performing a resynchronization operation to synchronize the unsynchronized information on the first cluster and the second cluster based on log information in at least one of an inflight tracker log for the inflight information and a dirty region log for the dirty region information.

公开(公告)号：US11290545B2

公开(公告)日：2022-03-29

申请号：US16872459

申请日：2020-05-12

Applicant: NetApp Inc.

Inventor： Paul Yuedong Mu ,  Nam Le ,  John Hoffmann ,  John Boyles

IPC: G06F15/17 ,  H04L67/146 ,  H04L67/1097 ,  H04L67/10 ,  H04L29/06 ,  H04L67/143

Abstract: Described herein are method and apparatus for servicing software components of nodes of a cluster storage system. During data-access sessions with clients, client IDs and file handles for accessing files are produced and stored to clients and stored (as session data) to each node. A serviced node is taken offline, whereby network connections to clients are disconnected. Each disconnected client is configured to retain its client ID and file handles and attempt reconnections. Session data of the serviced node is made available to a partner node (by transferring session data to the partner node). After clients have reconnected to the partner node, the clients may use the retained client IDs and file handles to continue a data-access session with the partner node since the partner node has access to the session data of the serviced node and thus will recognize and accept the retained client ID and file handles.

公开(公告)号：US20200274936A1

公开(公告)日：2020-08-27

申请号：US16872459

申请日：2020-05-12

Applicant: NetApp Inc.

Inventor： Paul Yuedong Mu ,  Nam Le ,  John Hoffmann ,  John Boyles

IPC: H04L29/08 ,  H04L29/06

Abstract: Described herein are method and apparatus for servicing software components of nodes of a cluster storage system. During data-access sessions with clients, client IDs and file handles for accessing files are produced and stored to clients and stored (as session data) to each node. A serviced node is taken offline, whereby network connections to clients are disconnected. Each disconnected client is configured to retain its client ID and file handles and attempt reconnections. Session data of the serviced node is made available to a partner node (by transferring session data to the partner node). After clients have reconnected to the partner node, the clients may use the retained client IDs and file handles to continue a data-access session with the partner node since the partner node has access to the session data of the serviced node and thus will recognize and accept the retained client ID and file handles.

公开(公告)号：US10554754B2

公开(公告)日：2020-02-04

申请号：US15820678

申请日：2017-11-22

Applicant: NetApp Inc.

Inventor： Paul Yuedong Mu ,  Manoj Sundararajan ,  Paul Ngan

IPC: H04L29/08

Abstract: Various embodiments are generally directed to techniques for reducing the time required for a node to take over for a failed node or to boot. An apparatus includes an access component to retrieve a metadata from a storage device coupled to a first D-module of a first node during boot, the metadata generated from a first mutable metadata portion and an immutable metadata portion, and the first metadata specifying a first address of a second D-module of a second node; a replication component to contact the second data storage module at the first address; and a generation component to, in response to failure of the contact, request a second mutable metadata portion from a N-module of the first node and generate a second metadata from the second mutable metadata portion and the immutable metadata portion, the second mutable metadata portion specifying a second address of the second D-module.

公开(公告)号：US20180107571A1

公开(公告)日：2018-04-19

申请号：US15820717

申请日：2017-11-22

Applicant: NetApp Inc.

Inventor： Paul Yuedong Mu ,  Manoj Sundararajan ,  Paul Ngan

IPC: G06F11/20 ,  G06F11/14

CPC classification number: G06F11/2092 ,  G06F11/1443 ,  G06F11/2005 ,  G06F11/2071 ,  G06F11/2097

Abstract: Various embodiments are generally directed to techniques for preparing to respond to failures in performing a data access command to modify client device data in a storage cluster system. An apparatus may include a processor component of a first node coupled to a first storage device; an access component to perform a command on the first storage device; a replication component to exchange a replica of the command with the second node via a communications session formed between the first and second nodes to enable at least a partially parallel performance of the command by the first and second nodes; and a multipath component to change a state of the communications session from inactive to active to enable the exchange of the replica based on an indication of a failure within a third node that precludes performance of the command by the third node. Other embodiments are described and claimed.

公开(公告)号：US20180097882A1

公开(公告)日：2018-04-05

申请号：US15820678

申请日：2017-11-22

Applicant: NetApp Inc.

Inventor： Paul Yuedong Mu ,  Manoj Sundararajan ,  Paul Ngan

IPC: H04L29/08

CPC classification number: H04L67/1097

Abstract: Various embodiments are generally directed to techniques for reducing the time required for a node to take over for a failed node or to boot. An apparatus includes an access component to retrieve a metadata from a storage device coupled to a first D-module of a first node during boot, the metadata generated from a first mutable metadata portion and an immutable metadata portion, and the first metadata specifying a first address of a second D-module of a second node; a replication component to contact the second data storage module at the first address; and a generation component to, in response to failure of the contact, request a second mutable metadata portion from a N-module of the first node and generate a second metadata from the second mutable metadata portion and the immutable metadata portion, the second mutable metadata portion specifying a second address of the second D-module.

公开(公告)号：US09838477B2

公开(公告)日：2017-12-05

申请号：US14528166

申请日：2014-10-30

Applicant: NETAPP, INC.

Inventor： Paul Yuedong Mu ,  Manoj Sundararajan ,  Paul Ngan

IPC: G06F15/167 ,  H04L29/08

CPC classification number: H04L67/1097

Abstract: Various embodiments are generally directed to techniques for reducing the time required for a node to take over for a failed node or to boot. An apparatus includes an access component to retrieve a metadata from a storage device coupled to a first data storage module of a first node during boot, the metadata generated from a first mutable metadata portion and an immutable metadata portion, and the first metadata specifying a first address of a second data storage module of a second node; a replication component to contact the second data storage module at the first address; and a generation component to, in response to failure of the contact, request a second mutable metadata portion from a network protocol module of the first node and generate a second metadata from the second mutable metadata portion and the immutable metadata portion, the second mutable metadata portion specifying a second address of the second data storage module.