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公开(公告)号：US20180139279A1
公开(公告)日：2018-05-17
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
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：US20170316029A1
公开(公告)日：2017-11-02
申请号：US15140992
申请日：2016-04-28
Applicant: NetApp Inc.
Inventor： Devang Kundanlal Shah , Dipankar Roy , Krishnaveni Budati , Kai Tan , Pranab Patnaik , Akhil Kaushik
IPC: G06F17/30
CPC classification number: G06F16/178 , G06F3/0605 , G06F3/065 , G06F3/0665 , G06F3/067 , G06F16/122 , G06F16/128
Abstract: One or more techniques and/or computing devices are provided for managing an arbitrary set of storage items using a granset. For example, a storage controller may host a plurality of storage items and/or logical unit numbers (LUNs). A subset of the storage items are grouped into a consistency group. A granset is created for tracking, managing, and/or providing access to the storage items within the consistency group. For example, the granset comprises application programming interfaces (APIs) and/or properties used to provide certain levels of access to the storage items (e.g., read access, write access, no access), redirect operations to access either data of an active file system or to a snapshot, fence certain operations (e.g., rename and delete operations), and/or other properties that apply to each storage item within the consistency group. Thus, the granset provides a persistent on-disk layout used to manage an arbitrary set of storage items.
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公开(公告)号：US20170220258A1
公开(公告)日：2017-08-03
申请号：US15008724
申请日：2016-01-28
Applicant: NetApp Inc.
Inventor： Akhil Kaushik , Anil Kumar Ponnapur , Aravind Srinivasa Raghavan , Manoj Kumar V Sundararajan
IPC: G06F3/06
CPC classification number: G06F3/065 , G06F3/061 , G06F3/0617 , G06F3/0619 , G06F3/0658 , G06F3/0659 , G06F3/067 , G06F3/0683
Abstract: One or more techniques and/or computing devices are provided for resilient replication of storage operations. For example, a first storage controller may host first storage having a replication relationship with second storage hosted by a second storage controller. To improve resiliency against transient network issues of a network between the storage controllers, the first storage controller may implement a queue and retry mechanism to retry replication operations not acknowledge back by the second storage controller within a threshold time. The second storage controller may maintain a cumulative sequence number of a latest replication operation performed in order, an operation response map of replication operations performed out of order, and an operation finder map identifying currently implemented replication operations, which may be used to process incoming replication operations. Single write semantics, write order consistency, and reduction of write amplification may be provided.
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公开(公告)号：US20170155713A1
公开(公告)日：2017-06-01
申请号：US14953048
申请日：2015-11-27
Applicant: NetApp Inc.
Inventor： Paul Anthony Powell , Akhil Kaushik , Srikumar Natarajan , Ching-Yuk Paul Ngan
CPC classification number: H04L67/1095 , G06F3/0614 , G06F3/065 , G06F3/067 , G06F11/2064 , G06F11/2069 , G06F17/30174 , G06F17/30215 , G06F2201/805 , 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：US20250165359A1
公开(公告)日：2025-05-22
申请号：US19033913
申请日：2025-01-22
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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Patent Agency Ranking
公开(公告)号：US20250147849A1
公开(公告)日：2025-05-08
申请号：US19016471
申请日：2025-01-10
Applicant: NetApp, Inc.
Inventor： Akhil Kaushik , Dhruvil Shah , Arun Kumar Selvam
IPC: G06F11/14 , G06F3/06 , G06F16/11 , G06F16/178
Abstract: Multi-site distributed storage systems and computer-implemented methods are described for improving a resumption time of input/output (I/O) operations during a common snapshot procedure for storage objects. A computer-implemented method includes initiating a snapshot multi create operation to selectively form a batch of first and second synchronous replicated datasets that belong to a first group of storage disks at the primary storage site and corresponding second group of storage disks at the secondary storage site, performing a batch snapshot create operation on the primary storage site by executing snapshots of storage objects on the primary storage site of the batch of first and second synchronous replicated datasets in parallel multiple threads to effectively utilize processing resources on the primary storage site, and initiating an independent workflow and state machine for each storage object of the batch of first and second synchronous replicated datasets.
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公开(公告)号：US20250130985A1
公开(公告)日：2025-04-24
申请号：US18489597
申请日：2023-10-18
Applicant: NetApp, Inc.
Inventor： V Ramakrishna Rao Yadala , Sohan Shetty , Akhil Kaushik
Abstract: A computer implemented method includes maintaining information indicative of whether a data replication relationship between a dataset associated with the local CG (CG1) and a mirror copy of the dataset stored on a remote CG (CG2) of a remote distributed storage system is in an in-synchronization (InSync) state or an out-of-synchronization (OOS) state, determining whether a CG storage expansion process is in progress, and in response to determining the OOS state and whether the primary storage site has a failure, initiating an automatic unplanned failover (AUFO) workflow without manual intervention on the original volumes in the CG1 of a first storage cluster of the primary storage site and the original volumes in the CG2 of a second storage cluster when the CG storage expansion process is in progress with a new source volume to be a member of CG1 and a new destination volume to be a member of CG2.
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公开(公告)号：US20250053488A1
公开(公告)日：2025-02-13
申请号：US18928972
申请日：2024-10-28
Applicant: NetApp, Inc.
Inventor： Anoop Vijayan , Akhil Kaushik , Sohan Shetty , Dhruvil Shah
IPC: G06F11/20
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 determining, with a second storage cluster, whether heartbeat information from one or more storage objects of a CG of a first set of CGs is received during a time period, determining an out of sync state for a data replication relationship between the CG of the first set of CGs and a mirrored CG of a second set of CGs when the heartbeat information is not received during the time period and sending a single bulk role change call with a cluster identifier from the second cluster to an external mediator to provide a role change from follower to leader in the second set of CGs.
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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.
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公开(公告)号：US12204416B2
公开(公告)日：2025-01-21
申请号：US18148696
申请日：2022-12-30
Applicant: NetApp, Inc.
Inventor： Akhil Kaushik , Dhruvil Shah , Arun Kumar Selvam
IPC: G06F11/00 , G06F3/06 , G06F11/14 , G06F16/11 , G06F16/178
Abstract: Multi-site distributed storage systems and computer-implemented methods are described for improving a resumption time of input/output (I/O) operations during a common snapshot procedure for storage objects. A computer-implemented method includes initiating a snapshot multi create operation to selectively form a batch of first and second synchronous replicated datasets that belong to a first group of storage disks at the primary storage site and corresponding second group of storage disks at the secondary storage site, performing a batch snapshot create operation on the primary storage site by executing snapshots of storage objects on the primary storage site of the batch of first and second synchronous replicated datasets in parallel multiple threads to effectively utilize processing resources on the primary storage site, and initiating an independent workflow and state machine for each storage object of the batch of first and second synchronous replicated datasets.
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