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公开(公告)号：US11861199B2
公开(公告)日：2024-01-02
申请号：US17871951
申请日：2022-07-24
Applicant: NetApp Inc.
Inventor： Ananthan Subramanian , Matthew Fontaine Curtis-Maury , Ram Kesavan , Vinay Devadas
CPC classification number: G06F3/064 , G06F3/0619 , G06F3/0631 , G06F3/0665 , G06F3/0679 , G06F9/30189 , G06F9/4498 , G06F11/0772
Abstract: Techniques are provided for data management across a persistent memory tier and a file system tier. A block within a persistent memory tier of a node is determined to have up-to-date data compared to a corresponding block within a file system tier of the node. The corresponding block may be marked as a dirty block within the file system tier. Location information of a location of the block within the persistent memory tier is encoded into a container associated with the corresponding block. In response to receiving a read operation, the location information is obtained from the container. The up-to-date data is retrieved from the block within the persistent memory tier using the location information for processing the read operation.
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公开(公告)号：US11836363B2
公开(公告)日：2023-12-05
申请号：US17750793
申请日：2022-05-23
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：US20230325289A1
公开(公告)日：2023-10-12
申请号：US18208478
申请日：2023-06-12
Applicant: NETAPP, INC.
Inventor： Ratnesh Gupta , Kalaivani Arumugham , Ram Kesavan , Ravikanth Dronamraju
CPC classification number: G06F11/2069 , G06F11/2064 , G06F11/1662 , G06F2201/82 , G06F11/2058 , G06F11/2071 , G06F11/2082
Abstract: Failover methods and systems for a storage environment are provided. During a takeover operation to take over storage of a first storage system node by a second storage system node, the second storage system node copies information from a first storage location to a second storage location. The first storage location points to an active file system of the first storage system node, and the second storage location is assigned to the second storage system node for the takeover operation. The second storage system node quarantines storage space likely to be used by the first storage system node for a write operation, while the second storage system node attempts to take over the storage of the first storage system node. The second storage system node utilizes information stored at the second storage location during the takeover operation to give back control of the storage to the first storage system node.
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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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公开(公告)号：US20220318188A1
公开(公告)日：2022-10-06
申请号：US17216940
申请日：2021-03-30
Applicant: NetApp Inc.
Inventor： Ananthan Subramanian , Matthew Fontaine Curtis-Maury , Ram Kesavan , Rupa Natarajan , Vinay Devadas
IPC: G06F16/11
Abstract: Techniques are provided for coordinating snapshot operations across multiple file systems. A notification may be received that a snapshot of data stored across a persistent memory file system and a storage file system is to be generated. Forwarding, of modify operations from a persistent memory tier to a file system tier for execution through the storage file system, may be enabled. Framing may be initiated to notify the storage file system of blocks within the persistent memory file system that comprise more up-to-date data than corresponding blocks within the storage file system. In response to the framing completing, a consistency point operation is performed to create the snapshot and to create a snapshot image as part of the snapshot.
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Patent Agency Ranking
公开(公告)号：US20220147428A1
公开(公告)日：2022-05-12
申请号：US17648531
申请日：2022-01-20
Applicant: NETAPP, INC.
Inventor： Ratnesh Gupta , Kalaivani Arumugham , Ram Kesavan , Ravikanth Dronamraju
Abstract: Failover methods and systems for a storage environment are provided. During a takeover operation to take over storage of a first storage system node by a second storage system node, the second storage system node copies information from a first storage location to a second storage location. The first storage location points to an active file system of the first storage system node, and the second storage location is assigned to the second storage system node for the takeover operation. The second storage system node quarantines storage space likely to be used by the first storage system node for a write operation, while the second storage system node attempts to take over the storage of the first storage system node. The second storage system node utilizes information stored at the second storage location during the takeover operation to give back control of the storage to the first storage system node.
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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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公开(公告)号：US20220083279A1
公开(公告)日：2022-03-17
申请号：US17536571
申请日：2021-11-29
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：US20210326065A1
公开(公告)日：2021-10-21
申请号：US16852580
申请日：2020-04-20
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：US20170344282A1
公开(公告)日：2017-11-30
申请号：US15167924
申请日：2016-05-27
Applicant: NetApp, Inc.
Inventor： Ram Kesavan , Ananthan Subramanian , Hiroshi Ishii , Abdul Basit , Joseph Brown, JR. , Rohit Singh
IPC: G06F3/06
Abstract: A method, non-transitory computer readable medium and storage server computing device that determines when a generated storage operation corresponds with one of a set of predefined storage operations. The storage operation is executed and a result of the execution of the storage operation is withheld from a file system, when the determining indicates that the storage operation corresponds with one of the set of predefined storage operations. A determination is made when a consistency point operation has completed. The result of the execution of the storage operation is presented to the file system, when the determining indicates that a consistency point operation has completed. This technology reduces the number of storage operations that are required to be journaled to maintain consistency of a file system, thereby reducing the runtime resources required to facilitate the journaling and replay resource required to replay the storage operations in a journal following a recovery.
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