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.

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.

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.

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：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

IPC: G06F11/20 ,  G06F11/16

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.

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.

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.