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公开(公告)号：US20180121453A1
公开(公告)日：2018-05-03
申请号：US15338219
申请日：2016-10-28
Applicant: NetApp, Inc.
Inventor： Sharad Jain , Hrishikesh Ashok Tapaswi , Ling Zheng , Onkar Bhat , Akhil Kaushik
Abstract: A storage appliance arranges snapshot data and snapshot metadata into different structures, and arranges the snapshot metadata to facilitate efficient snapshot manipulation, which may be for snapshot management or snapshot restore. The storage appliance receives snapshots according to a forever incremental configuration and arranges snapshot metadata into different types of records. The storage appliance stores these records in key-value stores maintained for each defined data collection (e.g., volume). The storage appliance arranges the snapshot metadata into records for inode information, records for directory information, and records that map source descriptors of data blocks to snapshot file descriptors. The storage appliance uses a locally generated snapshot identifier as a key prefix for the records to conform to a sort constrain of the key-value store, which allows the efficiency of the key-value store to be leveraged. The snapshot metadata arrangement facilitates efficient snapshot restore, file restore, and snapshot reclamation.
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公开(公告)号：US20170336997A1
公开(公告)日：2017-11-23
申请号：US15671037
申请日：2017-08-07
Applicant: NetApp Inc.
Inventor： Akhil Kaushik , Ripulkumar Hemantbhai Patel , Vrishali Dattatray Hajare , Andrew Eric Dunn , Rithin Kumar Shetty
CPC classification number: G06F3/0619 , G06F3/065 , G06F3/0683 , G06F11/1451 , G06F11/1469 , G06F11/1471 , G06F11/2064 , G06F11/2076 , G06F11/2082 , G06F2201/805 , G06F2201/84
Abstract: One or more techniques and/or computing devices are provided for resynchronization. For example, a request may be received to create pseudo snapshots of a first consistency group, hosted by a first storage controller, and a second consistency group, hosted by a second storage controller, having a synchronous replication relationship with the first consistency group. Incoming client write requests are logged within an intercept tracking log at the first storage controller. After a first drain without hold of incoming write requests is performed, a first pseudo common snapshot of the second consistency group is created. After a second drain without hold of incoming write operations is performed, a second pseudo common snapshot of the first consistency group and the intercept tracking log is created. The pseudo snapshots and the intercept tracking log (e.g., indicating a delta between the pseudo snapshots) are used to resynchronize the first and second consistency groups.
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公开(公告)号：US20170147601A1
公开(公告)日：2017-05-25
申请号：US14948653
申请日：2015-11-23
Applicant: NetApp Inc.
Inventor： Akhil Kaushik , Yi Yang , Yuedong Mu
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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公开(公告)号：US20250130733A1
公开(公告)日：2025-04-24
申请号：US18489610
申请日：2023-10-18
Applicant: NetApp, Inc.
Inventor： V Ramakrishna Rao Yadala , Anoop Vijayan , Sohan Shetty , Murali Subramanian , Arun Kumar Selvam , Akhil Kaushik
IPC: G06F3/06
Abstract: A computer implemented method includes maintaining information indicative of whether a data replication relationship between a dataset associated with the local CG and a mirror copy of the dataset stored on a remote CG of a remote distributed storage system is in an in-synchronization (InSync) state or an out-of-synchronization (OOS) state, initiating a storage expansion process including a source expansion to create a new source volume as a member of the local CG and a destination expansion to create a new destination volume as a member of the remote CG, and initiating a data replication relationship expand to establish a data replication relationship for the new source volume and the new destination volume.
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公开(公告)号：US20250053316A1
公开(公告)日：2025-02-13
申请号：US18810870
申请日：2024-08-21
Applicant: NetApp, Inc.
Inventor： Akhil Kaushik , Ripulkumar Hemantbhai Patel , Vrishali Dattatray Hajare , Andrew Eric Dunn , Rithin Kumar Shetty
Abstract: One or more techniques and/or computing devices are provided for resynchronization. For example, a request may be received to create pseudo snapshots of a first consistency group, hosted by a first storage controller, and a second consistency group, hosted by a second storage controller, having a synchronous replication relationship with the first consistency group. Incoming client write requests are logged within an intercept tracking log at the first storage controller. After a first drain without hold of incoming write requests is performed, a first pseudo common snapshot of the second consistency group is created. After a second drain without hold of incoming write operations is performed, a second pseudo common snapshot of the first consistency group and the intercept tracking log is created. The pseudo snapshots and the intercept tracking log (e.g., indicating a delta between the pseudo snapshots) are used to resynchronize the first and second consistency groups.
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Patent Agency Ranking
公开(公告)号：US12158824B2
公开(公告)日：2024-12-03
申请号：US17875837
申请日：2022-07-28
Applicant: NetApp, Inc.
Inventor： Anoop Vijayan , Akhil Kaushik , Sohan Shetty , 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 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：US12105678B2
公开(公告)日：2024-10-01
申请号：US18335710
申请日：2023-06-15
Applicant: NetApp Inc.
Inventor： Rithin Kumar Shetty , Akhil Kaushik , Nagender Somavarapu , Yuedong Mu , Pranab Patnaik
IPC: G06F16/178 , G06F9/455 , G06F11/14 , G06F11/20 , G06F16/188 , H04L67/1095
CPC classification number: G06F16/178 , G06F9/45558 , G06F11/1464 , G06F11/1484 , G06F11/2076 , G06F11/2082 , G06F16/188 , H04L67/1095 , G06F2009/45562 , G06F2009/45583 , G06F2201/84
Abstract: One or more techniques and/or computing devices are provided for replicating virtual machine disk clones. For example, a first storage controller, hosting first storage, may have a synchronous replication relationship with a second storage controller hosting second storage. A virtual machine, within the first storage, may be specified as having synchronous replication protection. Accordingly, virtual machine disk clones of a virtual machine disk of the virtual machine may be replicated from the first storage to the second storage. For example, virtual machine disk clones may be synchronous replicated, replicated by a resync process invoked by a hypervisor agent, and/or stored and replicated from a clone backup directory.
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公开(公告)号：US20240143453A1
公开(公告)日：2024-05-02
申请号：US18148696
申请日：2022-12-30
Applicant: NetApp, Inc.
Inventor： Akhil Kaushik , Dhruvil Shah , Arun Kumar Selvam
IPC: G06F11/14
CPC classification number: G06F11/1466 , G06F11/1451 , G06F2201/84
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：US20240143447A1
公开(公告)日：2024-05-02
申请号：US18148644
申请日：2022-12-30
Applicant: NetApp, Inc.
CPC classification number: G06F11/1448 , G06F3/0611 , G06F3/064 , G06F3/067 , G06F2201/84
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 snap create handler operation for a storage object of a batch of storage objects having a plurality of replicated datasets with each replicated dataset having a synchronous replication relationship between at least one storage object of the first storage node and at least one replicated storage object of the second storage node, determining whether a consistency point is currently in progress or not, and providing a hint to accelerate a currently in progress consistency point when the consistency point is currently in progress.
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公开(公告)号：US11966307B2
公开(公告)日：2024-04-23
申请号：US17751410
申请日：2022-05-23
Applicant: NetApp, Inc.
Inventor： Murali Subramanian , Sohan Shetty , Akhil Kaushik
IPC: G06F11/20 , H04L67/1097
CPC classification number: G06F11/2069 , G06F11/2092 , G06F2201/85 , H04L67/1097
Abstract: Systems and methods for re-aligning data replication configuration of a cross-site storage solution after a failover are provided. According to one embodiment, after a failover, the new primary distributed storage system orchestrates flipping of the data replication configuration of a peered consistency group (CG) to reestablish zero RPO and zero RTO protections for the peered CG. The primary causes the secondary distributed storage system to perform an atomic database operation on its remote configuration database to (i) delete an existing source configuration that identifies the secondary as a source of data replication; and (ii) persist a new destination configuration identifying the secondary as a destination of data replication. Then, the primary performs an atomic database operation on its local configuration database to (i) delete an existing destination configuration identifying the primary as the destination; and (ii) persist a new source configuration identifying the distributed storage system as the source.
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