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.

公开(公告)号：US20210328593A1

公开(公告)日：2021-10-21

申请号：US17364946

申请日：2021-07-01

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.

公开(公告)号：US11063601B1

公开(公告)日：2021-07-13

申请号：US16852586

申请日：2020-04-20

Applicant: NetApp Inc.

Inventor： Ram Kesavan ,  Matthew Fontaine Curtis-Maury ,  Abdul Basit ,  Vinay Devadas ,  Ananthan Subramanian ,  Mark Smith

IPC: H03M1/12 ,  H03M1/06 ,  G06F3/06 ,  G06F16/901

Abstract: Techniques are provided for implementing a file system format for persistent memory. A node, with persistent memory, receives an operation associated with 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 has 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.

公开(公告)号：US09658778B2

公开(公告)日：2017-05-23

申请号：US14531246

申请日：2014-11-03

Applicant: NETAPP, INC.

Inventor： Kevin Faulkner ,  Leon Fairbanks ,  Phil Larson ,  Siu Wu ,  Vinod Vasant Pai ,  Abdul Basit ,  Curtis Hrischuk

IPC: G06F3/06

CPC classification number: G06F3/061 ,  G06F3/0617 ,  G06F3/0653 ,  G06F3/067

Abstract: Methods and systems for inter-cluster storage system monitoring and analysis are provided. The method includes monitoring a non-volatile memory delay center for a first storage cluster having a first node and a second node configured to operate as a first high availability pair, where data for a write request to write data to the first node is also written to the second node as well as to a second cluster having a third node and a fourth node, where the third node and the fourth node are also configured to operate as a second high availability pair to store the data for the write request at one or both of the third and fourth node. The non-volatile memory delay center is used to monitor and detect latency due to any delay caused by a non-volatile memory of the first node used as a write cache.

公开(公告)号：US20240361912A1

公开(公告)日：2024-10-31

申请号：US18307097

申请日：2023-04-26

Applicant: NetApp Inc.

Inventor： Abdul Basit ,  Daniel McCarthy ,  Christopher Lee Cason ,  Jian Hu

IPC: G06F3/06

CPC classification number: G06F3/0613 ,  G06F3/0659 ,  G06F3/0683

Abstract: Techniques are provided for dynamically implementing quality of service policies for a distributed storage system based upon resources saturation. A quality of service policy is defined for throttling I/O operations received by a node of the distributed storage system based upon whether resources of the node have become saturated. The quality of service policy is dynamically implemented based upon ever changing resource utilization and saturation. Dynamically implementing the quality of service policy improves the ability to efficiently utilize resources of the node compared to conventional static polices that cannot adequately react to such 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 implementing the quality of service policy results in more efficient operation and mitigates resource starvation.

公开(公告)号：US12126502B1

公开(公告)日：2024-10-22

申请号：US18307103

申请日：2023-04-26

Applicant: NetApp Inc.

Inventor： Abdul Basit ,  Daniel McCarthy ,  Christopher Lee Cason ,  Jian Hu

IPC: G06F15/173 ,  G06F9/50 ,  H04L41/5067

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.

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.

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.

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.

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

IPC: G06F3/06 ,  G06F11/14

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.