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公开(公告)号：US11409708B2
公开(公告)日：2022-08-09
申请号：US16679545
申请日：2019-11-11
Applicant: NetApp Inc.
Inventor： Devang Kundanlal Shah , Dipankar Roy , Krishnaveni Budati , Kai Tan , Pranab Patnaik , Akhil Kaushik
IPC: G06F16/10 , G06F16/178 , G06F16/11 , G06F3/06
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：US11379412B2
公开(公告)日：2022-07-05
申请号：US16819246
申请日：2020-03-16
Applicant: NetApp Inc.
Inventor： Vikas Yadav , Rajesh Desai , Akhil Kaushik
IPC: G06F16/13
Abstract: A system and method for enabling data replication is described. A set of protocol messages can be associated with a set of corresponding set of requests. The associated set of protocol messages can be provided to each of a source storage system and a destination storage system. The source storage system and the destination storage system can be heterogeneous storage systems that implement different types of file systems or file layouts. The source storage system and the destination storage system are enabled to perform a data replication process, in which at least a set of data is to be replicated from the source storage system to the destination storage system, using at least a protocol message from the associated set of protocol messages. The protocol message can correspond to a request for a list of snapshots stored at the source storage system.
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公开(公告)号：US11036423B2
公开(公告)日：2021-06-15
申请号：US16903518
申请日：2020-06-17
Applicant: NetApp Inc.
Inventor： Akhil Kaushik , Anoop Chakkalakkal Vijayan
Abstract: Techniques are provided for overlapping write handling. Overlapping write managers are used to maintain the order that write operations are executed at a first computing environment and replicated to a second computing environment. Overlapping write managers are pre-allocated as available for managing overlapping write operations. A mapping is used to track what overlapping write managers are currently allocated for particular file handles of files. Thus, if an incoming write operation targets a file handle of an already allocated overlapping write manager, then that overlapping write manager is used to execute and replicate the incoming write operation so that the order of execution of overlapping writes by the second computing environment is the same as at the first computing environment. If there is no allocated overlapping write manager for the file handle, then a new overlapping write manager is allocated and utilized.
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公开(公告)号：US20200084271A1
公开(公告)日：2020-03-12
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: H04L29/08 , G06F11/20 , G06F16/182 , G06F16/178 , G06F3/06
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：US20200050687A1
公开(公告)日：2020-02-13
申请号：US16191700
申请日：2018-11-15
Applicant: NetApp Inc.
IPC: G06F17/30
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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Patent Agency Ranking
公开(公告)号：US10523751B2
公开(公告)日：2019-12-31
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
IPC: G06F12/00 , H04L29/08 , G06F16/178 , G06F16/182 , 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.
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公开(公告)号：US20190324950A1
公开(公告)日：2019-10-24
申请号：US16456775
申请日：2019-06-28
Applicant: NetApp Inc.
Inventor： Rithin Kumar Shetty , Akhil Kaushik , Nagender Somavarapu , Yuedong Mu , Pranab Patnaik
IPC: G06F16/178 , G06F11/20 , H04L29/08 , G06F9/455 , G06F11/14 , G06F16/188
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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18.发明申请公开(公告)号：US20190163382A1
公开(公告)日：2019-05-30
申请号：US16265032
申请日：2019-02-01
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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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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