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公开(公告)号：US20250086075A1
公开(公告)日：2025-03-13
申请号：US18958730
申请日：2024-11-25
Applicant: NetApp, Inc.
Inventor： Yash Hetal Trivedi , Daniel McCarthy , Ananthan Subramanian , William Arthur Gutknecht , Kevin Daniel Varghese , Swaroop Vikram Choudhari , Abdul Basit , Christopher Clark Corey , Chad Edmund Schneider
Abstract: Techniques are provided for failing over an aggregate from one file system instance to a different file system instance of a distributed scale-out storage system. The aggregate may be stored within distributed storage that is accessible to a plurality of file system instances of the distributed scale-out storage system. When the aggregate is failed over from a first file system instance to a second file system instance, the first file system instance may still have a valid read lease that allows the first file system instance to serve client I/O, directed to the aggregate, using a cache. In order to prevent the first file system instance from serving stale data from the cache before the read lease expires, state machines and a set of control data are used to ensure that the second file system instance attaches to the aggregate only after the read lease has expired.
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公开(公告)号：US20250038756A1
公开(公告)日：2025-01-30
申请号：US18914423
申请日：2024-10-14
Applicant: NetApp, Inc.
Inventor： Ram Kesavan , Matthew Fontaine Curtis-Maury , Abdul Basit , Vinay Devadas , Ananthan Subramanian , Mark Smith
IPC: H03M1/06 , G06F3/06 , G06F16/901
Abstract: Techniques are provided for implementing a file system format for persistent memory. A node, comprising persistent memory, receives an operation comprising a file identifier and file system instance information. A list of file system info objects are evaluated to identify a file system info object matching the file system instance information. An inofile, identified by the file system info object as being associated with inodes of files within an instance of the file system targeted by the operation, is traversed to identify an inode matching the file identifier. If the inode comprises an indicator that the file is tiered into the persistent memory, then the inode it utilized to facilitate execution of the operation upon the persistent memory. Otherwise, the operation is routed to a storage file system tier for execution by a storage file system upon storage associated with the node.
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公开(公告)号：US20240364604A1
公开(公告)日：2024-10-31
申请号：US18307103
申请日：2023-04-26
Applicant: NetApp Inc.
Inventor： Abdul Basit , Daniel McCarthy , Christopher Lee Cason , Jian Hu
IPC: H04L41/5067 , G06F9/50
CPC classification number: H04L41/5067 , G06F9/5072 , G06F2209/501 , G06F2209/5011 , G06F2209/503 , G06F2209/505
Abstract: Techniques are provided for dynamically implementing quality of service policies using a configurable quality of service provider pipeline. A quality of service policy is defined for throttling I/O operations received by a node based upon whether resources of the node have become over utilized. The quality of service policy is used to dynamically construct a quality of service provider pipeline with select quality of service providers that improve the ability to efficiently utilize resources compared to conventional static polices that cannot adequately react to changing considerations and resource utilization/saturation. With conventional static policies, an administrator manually defines a minimum amount of guaranteed resources and/or a maximum resource usage cap that could be set to values that result in inefficient operation and resource starvation. Dynamically constructing and utilizing the quality of service provider pipeline results in more efficient operation and mitigates resource starvation.
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公开(公告)号：US20240103744A1
公开(公告)日：2024-03-28
申请号：US18528556
申请日：2023-12-04
Applicant: NetApp Inc.
Inventor： Abdul Basit , Ananthan Subramanian , Ram Kesavan , Matthew Fontaine Curtis-Maury
IPC: G06F3/06
CPC classification number: G06F3/0631 , G06F3/0604 , G06F3/064 , G06F3/065 , G06F3/0679
Abstract: Techniques are provided for block allocation for persistent memory during aggregate transition. In a high availability pair including first and second nodes, the first node makes a determination that control of a first aggregate is to transition from the first node to the second node. A portion of available free storage space is allocated from a first persistent memory of the first node as allocated pages within the first persistent memory. Metadata information for the allocated pages is updated with an identifier of the first aggregate to create updated metadata information reserving the allocated pages for the first aggregate. The updated metadata information is mirrored to the second node, so that the second node also reserves those pages. Control of the first aggregate is transitioned to the second node. As a result, the nodes do not attempt allocating the same free pages to different aggregates during a transition.
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公开(公告)号：US20240086116A1
公开(公告)日：2024-03-14
申请号：US18513894
申请日：2023-11-20
Applicant: NetApp Inc.
Inventor： Ram Kesavan , Matthew Fontaine Curtis-Maury , Abdul Basit , Vinay Devadas , Ananthan Subramanian
CPC classification number: G06F3/0659 , G06F3/0619 , G06F3/0644 , G06F3/0653 , G06F3/067 , G06F3/0683 , G06F11/1417 , G06F11/1464 , G06F11/1469
Abstract: Techniques are provided for implementing write ordering for persistent memory. A set of actions are identified for commitment to persistent memory of a node for executing an operation upon the persistent memory. An episode is created to comprise a first subset of actions of the set of actions that can be committed to the persistent memory in any order with respect to one another such that a consistent state of the persistent memory can be reconstructed in the event of a crash of the node during execution of the operation. The first subset of actions within the episode are committed to the persistent memory and further execution of the operation is blocked until the episode completes.
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Patent Agency Ranking
公开(公告)号：US11340804B2
公开(公告)日：2022-05-24
申请号：US16911425
申请日：2020-06-25
Applicant: NetApp Inc.
Inventor： Abdul Basit , Ananthan Subramanian , Ram Kesavan , Matthew Fontaine Curtis-Maury
IPC: G06F3/06
Abstract: Techniques are provided for block allocation for persistent memory during aggregate transition. In a high availability pair including first and second nodes, the first node makes a determination that control of a first aggregate is to transition from the first node to the second node. A portion of available free storage space is allocated from a first persistent memory of the first node as allocated pages within the first persistent memory. Metadata information for the allocated pages is updated with an identifier of the first aggregate to create updated metadata information reserving the allocated pages for the first aggregate. The updated metadata information is mirrored to the second node, so that the second node also reserves those pages. Control of the first aggregate is transitioned to the second node. As a result, the nodes do not attempt allocating the same free pages to different aggregates during a transition.
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公开(公告)号：US20250147694A1
公开(公告)日：2025-05-08
申请号：US18943522
申请日：2024-11-11
Applicant: NetApp, Inc.
Inventor： Ram Kesavan , Matthew Fontaine Curtis-Maury , Abdul Basit , Vinay Devadas , Ananthan Subramanian
Abstract: Techniques are provided for implementing write ordering for persistent memory. A set of actions are identified for commitment to persistent memory of a node for executing an operation upon the persistent memory. An episode is created to comprise a first subset of actions of the set of actions that can be committed to the persistent memory in any order with respect to one another such that a consistent state of the persistent memory can be reconstructed in the event of a crash of the node during execution of the operation. The first subset of actions within the episode are committed to the persistent memory and further execution of the operation is blocked until the episode completes.
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公开(公告)号：US20240411645A1
公开(公告)日：2024-12-12
申请号：US18809170
申请日：2024-08-19
Applicant: NetApp, Inc.
Inventor： Matthew Fontaine Curtis-Maury , Ram Kesavan , Ananthan Subramanian , Abdul Basit , Vinay Devadas , Yash Hetal Trivedi
IPC: G06F11/14 , G06F13/16 , G06F16/182
Abstract: Techniques are provided for persistent memory file system reconciliation. As part of the persistent memory file system reconciliation, high level file system metadata associated with a persistent memory file system of persistent memory is reconciled. Client access to the persistent memory file system is inaccessible until reconciliation of the high level file system metadata has completed. A first scanner is executed to traverse pages of the persistent memory in order to fix local inconsistencies associated with the pages. A local inconsistency of a first set of metadata or data of a page is fixed using a second set of metadata or data of the page. The first scanner is executed asynchronously in parallel with processing client I/O directed to the persistent memory file system.
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公开(公告)号：US12066897B2
公开(公告)日：2024-08-20
申请号：US18302212
申请日：2023-04-18
Applicant: NetApp Inc.
Inventor： Matthew Fontaine Curtis-Maury , Ram Kesavan , Ananthan Subramanian , Abdul Basit , Vinay Devadas , Yash Hetal Trivedi
IPC: G06F11/00 , G06F11/14 , G06F13/16 , G06F16/182
CPC classification number: G06F11/1435 , G06F13/1668 , G06F16/183
Abstract: Techniques are provided for persistent memory file system reconciliation. As part of the persistent memory file system reconciliation, high level file system metadata associated with a persistent memory file system of persistent memory is reconciled. Client access to the persistent memory file system is inaccessible until reconciliation of the high level file system metadata has completed. A first scanner is executed to traverse pages of the persistent memory in order to fix local inconsistencies associated with the pages. A local inconsistency of a first set of metadata or data of a page is fixed using a second set of metadata or data of the page. The first scanner is executed asynchronously in parallel with processing client I/O directed to the persistent memory file system.
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公开(公告)号：US20230336183A1
公开(公告)日：2023-10-19
申请号：US18186657
申请日：2023-03-20
Applicant: NetApp Inc.
Inventor： Ram Kesavan , Matthew Fontaine Curtis-Maury , Abdul Basit , Vinay Devadas , Ananthan Subramanian , Mark Smith
IPC: H03M1/06 , G06F3/06 , G06F16/901
CPC classification number: H03M1/0687 , G06F3/0604 , G06F3/0653 , G06F3/0685 , G06F16/9027 , H03M1/0695
Abstract: Techniques are provided for implementing a file system format for persistent memory. A node, comprising persistent memory, receives an operation comprising a file identifier and file system instance information. A list of file system info objects are evaluated to identify a file system info object matching the file system instance information. An inofile, identified by the file system info object as being associated with inodes of files within an instance of the file system targeted by the operation, is traversed to identify an inode matching the file identifier. If the inode comprises an indicator that the file is tiered into the persistent memory, then the inode it utilized to facilitate execution of the operation upon the persistent memory. Otherwise, the operation is routed to a storage file system tier for execution by a storage file system upon storage associated with the node.
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