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公开(公告)号：US20200050587A1
公开(公告)日：2020-02-13
申请号：US16401257
申请日：2019-05-02
Applicant: NetApp Inc.
IPC: G06F16/178 , G06F16/23 , G06F16/27 , G06F16/18
Abstract: Techniques are provided for resynchronizing a synchronous replication relationship. Asynchronous incremental transfers are performed to replicate data of a storage object to a replicated storage object. Incoming write requests, targeting the storage object, are logged into a dirty region log during a last asynchronous incremental transfer. Metadata operations, executed on the storage object, are logged into a metadata log during the last asynchronous incremental transfer. Sequence numbers are assigned to the metadata operations based upon an order of execution. The metadata operations are replicated to the replicated storage object for execution according to the sequence numbers, and the dirty regions are replicated to the replicated storage object in response to the metadata operations having been replicated to the replicated storage object. The storage object and replicated storage object are transitioned to a synchronous replication state where incoming operations are synchronously replicated to the replicated storage object.
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公开(公告)号：US20200042537A1
公开(公告)日：2020-02-06
申请号：US16401224
申请日：2019-05-02
Applicant: NetApp Inc.
Inventor： Akhil Kaushik , Balaji Ramani
IPC: G06F16/27 , G06F16/176 , G06F11/14 , G06F16/11
Abstract: Techniques are provided for synchronous replication based cutover. An asynchronous replication process is executed to perform asynchronous incremental transfers of data of a storage object from a first computing environment to a replicated storage object at a second computing environment until a cutover criteria is met. A synchronous replication process is executed to synchronously replicate operations, targeting the storage object, to the replicated storage object based upon the cutover criteria being met. A cutover is performed to direct operations from targeting the storage object to targeting the replicated storage object based upon the synchronous replication process reaching a steady state of synchronous replication for sub-objects of the storage object, where operations are committed to both the storage object and the replicated storage object.
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公开(公告)号：US10423584B2
公开(公告)日：2019-09-24
申请号：US14948653
申请日：2015-11-23
Applicant: NetApp Inc.
Inventor： Akhil Kaushik , Yi Yang , Yuedong Mu
IPC: G06F16/178 , G06F16/16 , H04L29/08 , 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 local storage controller hosting local storage and a remote 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 file operations may be implemented in parallel upon the local storage and the remote storage. Independent metadata file operations may be independently implemented from data file operations upon the local storage, and upon local completion may be remotely implemented upon the remote storage. In-flight data file operations may be drained before dependent metadata file operations are locally implemented upon the local storage, and upon local completion may be remotely implemented upon the remote storage.
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54.发明授权公开(公告)号：US10228871B2
公开(公告)日：2019-03-12
申请号：US15049410
申请日：2016-02-22
Applicant: NetApp Inc.
Inventor： Pranab Patnaik , Akhil Kaushik
Abstract: One or more techniques and/or computing devices are provided for utilizing snapshots for data integrity validation and/or faster application recovery. For example, a first storage controller, hosting first storage, has a synchronous replication relationship with a second storage controller hosting second storage. A snapshot replication policy rule is defined to specify that a replication label is to be used for snapshot create requests, targeting the first storage, that are to be replicated to the second storage. A snapshot creation policy is created to issue snapshot create requests comprising the replication label. Thus a snapshot of the first storage and a replication snapshot of the second storage are created based upon a snapshot create request comprising the replication label. The snapshot and the replication snapshot may be compared for data integrity validation (e.g., determine whether the snapshots comprise the same data) and/or quickly recovering an application after a disaster.
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55.发明申请公开(公告)号：US20170242599A1
公开(公告)日：2017-08-24
申请号：US15049410
申请日：2016-02-22
Applicant: NetApp Inc.
Inventor： Pranab Patnaik , Akhil Kaushik
IPC: G06F3/06
CPC classification number: G06F3/0619 , G06F3/065 , G06F3/067 , G06F11/2076 , G06F11/2082 , G06F2201/82 , G06F2201/84
Abstract: One or more techniques and/or computing devices are provided for utilizing snapshots for data integrity validation and/or faster application recovery. For example, a first storage controller, hosting first storage, has a synchronous replication relationship with a second storage controller hosting second storage. A snapshot replication policy rule is defined to specify that a replication label is to be used for snapshot create requests, targeting the first storage, that are to be replicated to the second storage. A snapshot creation policy is created to issue snapshot create requests comprising the replication label. Thus a snapshot of the first storage and a replication snapshot of the second storage are created based upon a snapshot create request comprising the replication label. The snapshot and the replication snapshot may be compared for data integrity validation (e.g., determine whether the snapshots comprise the same data) and/or quickly recovering an application after a disaster.
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Patent Agency Ranking
公开(公告)号：US20250168228A1
公开(公告)日：2025-05-22
申请号：US19030430
申请日：2025-01-17
Applicant: NetApp, Inc.
Inventor： Paul Anthony Powell , Akhil Kaushik , Srikumar Natarajan , Ching-Yuk Paul Ngan
IPC: H04L67/1095 , G06F3/06 , G06F11/20 , G06F16/178 , G06F16/182 , 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.
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公开(公告)号：US20250165167A1
公开(公告)日：2025-05-22
申请号：US19034376
申请日：2025-01-22
Applicant: NetApp, Inc.
Inventor： Anoop Vijan , Sohan Shetty , Dhruvil Shah , Omprakash Khandelwal , Akhil Kaushik
IPC: G06F3/06
Abstract: A computer-implemented method comprises transitioning from a unidirectional asynchronous replication to initiating bi-directional synchronous replication between one or more storage objects of a first consistency group (CG1) of a primary storage site and one or more storage objects of a second consistency group (CG2) of a secondary storage site, converting the one or more storage objects of the CG2 from data protection read only access to read write access, and performing a reverse synchronization process between the one or more storage objects of the CG2 and the one or more storage objects of the CG1 including instantiating a reverse splitter on each volume of CG2, establishing reverse sync replication sessions for each storage object of the CG2, and allowing input output (IO) access to the one or more storage objects of the CG2.
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公开(公告)号：US20250110837A1
公开(公告)日：2025-04-03
申请号：US18977281
申请日：2024-12-11
Applicant: NetApp, Inc.
Inventor： Sohan Shetty , Akhil Kaushik
Abstract: Multi-site distributed storage systems and computer-implemented methods are described for providing common snapshot retention and automatic fanout reconfiguration for an asynchronous leg after a failure event that causes a failover from a primary storage site to a secondary storage site. A computer-implemented method comprises providing an asynchronous replication relationship with an asynchronous update schedule from one or more storage objects of the first storage node to one or more replicated storage objects of the third storage node, creating a snapshot copy of the one or more storage objects of the first storage node, transferring the snapshot copy to the third storage node based on an asynchronous mirror policy, and intercepting the snapshot create operation on the primary storage site and transferring the snapshot copy to the second storage node to provide a common snapshot between the second storage node and the third storage node.
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公开(公告)号：US20250086072A1
公开(公告)日：2025-03-13
申请号：US18958785
申请日：2024-11-25
Applicant: NetApp, Inc.
Inventor： Sohan Shetty , Akhil Kaushik
Abstract: A computer-implemented method comprises providing a synchronous replication relationship from one or more storage objects of a first storage node to one or more replicated storage objects of a second storage node, providing an asynchronous replication relationship with an asynchronous update schedule from the one or more storage objects of the first storage node to one or more replicated storage objects of the third storage node to provide a protection configuration, tracking, with the third storage node of the tertiary site, a state of the secondary storage site, automatically performing a failover from the primary storage site to the secondary storage site and activating a synchronous mirror copy for the one or more replicated storage objects of the second storage node, and automatically initiating realignment and reconfiguration of the protection configuration to the tertiary storage site based upon the state of the secondary storage site.
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公开(公告)号：US12235741B2
公开(公告)日：2025-02-25
申请号：US17875814
申请日：2022-07-28
Applicant: NetApp, Inc.
Inventor： Anoop Vijayan , Akhil Kaushik , Dhruvil Shah
Abstract: Multi-site distributed storage systems and computer-implemented methods are described for improving a resumption time of input/output (I/O) operations during an automatic unplanned failover (AUFO). A computer-implemented method includes monitoring, with a second cluster, heartbeat information received at ultra-short time intervals from a first connection of one or more storage objects of the first cluster, determining, with the second cluster, whether the heartbeat information from the first connection is received during an ultra-short time interval, and intelligently routing heartbeat information from the one or more storage objects of the first cluster from the first connection to a second connection when the heartbeat information from the first connection is not received during the ultra-short time interval.
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