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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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2.发明申请公开(公告)号：US20240385991A1
公开(公告)日：2024-11-21
申请号：US18786742
申请日：2024-07-29
Applicant: NetApp, Inc.
Inventor： Matthew Fontaine Curtis-Maury , Vinay Devadas , Yash Hetal Trivedi
Abstract: Techniques are provided for supporting a lookup structure for a file system implementing hierarchical reference counting. A write operation to write data to a page maintained by the file system is received. A lookup within a lookup structure is performed using information related to the page in order to identify a lookup entry within the lookup structure. A hash generation count within the lookup entry is compared to a file system info generation count within a file system info object for a volume associated with the page. In response to the lookup entry generation count not matching the file system info generation count, a file system tree of the file system is traversed to determine a reference count for the page, and the write operation is implemented based upon the reference count. Otherwise, the lookup entry is utilized to access the page for processing the write operation.
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公开(公告)号：US20230251932A1
公开(公告)日：2023-08-10
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: G06F11/14 , 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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4.发明申请公开(公告)号：US20220107916A1
公开(公告)日：2022-04-07
申请号：US17060400
申请日：2020-10-01
Applicant: NetApp Inc.
Inventor： Matthew Fontaine Curtis-Maury , Vinay Devadas , Yash Hetal Trivedi
Abstract: Techniques are provided for supporting a lookup structure for a file system implementing hierarchical reference counting. A write operation to write data to a page maintained by the file system is received. A lookup within a lookup structure is performed using information related to the page in order to identify a lookup entry within the lookup structure. A hash generation count within the lookup entry is compared to a file system info generation count within a file system info object for a volume associated with the page. In response to the lookup entry generation count not matching the file system info generation count, a file system tree of the file system is traversed to determine a reference count for the page, and the write operation is implemented based upon the reference count. Otherwise, the lookup entry is utilized to access the page for processing the write operation.
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公开(公告)号：US20220083422A1
公开(公告)日：2022-03-17
申请号：US17018176
申请日：2020-09-11
Applicant: NetApp Inc.
Inventor： Matthew Fontaine Curtis-Maury , Ram Kesavan , Ananthan Subramanian , Abdul Basit , Vinay Devadas , Yash Hetal Trivedi
IPC: G06F11/14 , G06F16/182 , G06F13/16
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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Patent Agency Ranking
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：US11630733B2
公开(公告)日：2023-04-18
申请号：US17018176
申请日：2020-09-11
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
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：US12153504B2
公开(公告)日：2024-11-26
申请号：US18089192
申请日：2022-12-27
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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10.发明授权公开(公告)号：US12050553B2
公开(公告)日：2024-07-30
申请号：US17060400
申请日：2020-10-01
Applicant: NetApp Inc.
Inventor： Matthew Fontaine Curtis-Maury , Vinay Devadas , Yash Hetal Trivedi
CPC classification number: G06F16/148 , G06F3/0604 , G06F3/0655 , G06F3/067
Abstract: Techniques are provided for supporting a lookup structure for a file system implementing hierarchical reference counting. A write operation to write data to a page maintained by the file system is received. A lookup within a lookup structure is performed using information related to the page in order to identify a lookup entry within the lookup structure. A hash generation count within the lookup entry is compared to a file system info generation count within a file system info object for a volume associated with the page. In response to the lookup entry generation count not matching the file system info generation count, a file system tree of the file system is traversed to determine a reference count for the page, and the write operation is implemented based upon the reference count. Otherwise, the lookup entry is utilized to access the page for processing the write operation.
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