公开(公告)号：US11768620B2

公开(公告)日：2023-09-26

申请号：US16857919

申请日：2020-04-24

Applicant: NetApp, Inc.

Inventor： Rohit Shankar Singh ,  Douglas P. Doucette ,  Abhijeet Prakash Gole ,  Sushilkumar Gangadharan

IPC: G06F3/00 ,  G06F3/06

CPC classification number: G06F3/0644 ,  G06F3/0604 ,  G06F3/0659 ,  G06F3/0689

Abstract: The disclosed technology relates determining a first subset of a plurality drives having a first zone size and a second subset of the plurality of drives having a second zone size different from the first zone size, within a redundant array of independent disks (RAID) group. A prevailing zone size between the first zone size and the second zone size is determined. One or more logical zones within the determined first subset of the plurality of drives and the determined second subset of the plurality of drives for a received input-output operation is reserved based on the determined prevailing zone size. The received input-output operation is completed within the reserved one or more logical zones within the determined first subset of the plurality of drives and the determined second subset of the plurality of drives.

公开(公告)号：US20210334215A1

公开(公告)日：2021-10-28

申请号：US16857995

申请日：2020-04-24

Applicant: NetApp, Inc.

Inventor： Abhijeet Prakash Gole ,  Rohit Shankar Singh ,  Douglas P. Doucette ,  Ratnesh Gupta ,  Sourav Sen ,  Prathamesh Deshpande

IPC: G06F12/10

Abstract: The disclosed technology relates to determining physical zone data within a zoned namespace solid state drive (SSD), associated with logical zone data included in a first received input-output operation based on a mapping data structure within a namespace of the zoned namespace SSD. A second input-output operation specific to the determined physical zone data is generated wherein the second input-output operation and the received input-output operation is of a same type. The generated second input-output operation is completed using the determined physical zone data within the zoned namespace SSD.

公开(公告)号：US11966611B2

公开(公告)日：2024-04-23

申请号：US18332304

申请日：2023-06-09

Applicant: NetApp, Inc.

Inventor： Rohit Shankar Singh ,  Douglas P. Doucette ,  Abhijeet Prakash Gole ,  Sushilkumar Gangadharan

IPC: G06F3/00 ,  G06F3/06

CPC classification number: G06F3/0644 ,  G06F3/0604 ,  G06F3/0659 ,  G06F3/0689

Abstract: The disclosed technology relates determining a first subset of a plurality drives having a first zone size and a second subset of the plurality of drives having a second zone size different from the first zone size, within a redundant array of independent disks (RAID) group. A prevailing zone size between the first zone size and the second zone size is determined. One or more logical zones within the determined first subset of the plurality of drives and the determined second subset of the plurality of drives for a received input-output operation is reserved based on the determined prevailing zone size. The received input-output operation is completed within the reserved one or more logical zones within the determined first subset of the plurality of drives and the determined second subset of the plurality of drives.

公开(公告)号：US11803329B2

公开(公告)日：2023-10-31

申请号：US17456012

申请日：2021-11-22

Applicant: NETAPP, INC.

Inventor： Douglas P. Doucette ,  Sushilkumar Gangadharan ,  Rohit Singh

IPC: G06F3/06 ,  G06F12/02

CPC classification number: G06F3/0659 ,  G06F3/0613 ,  G06F3/0688 ,  G06F12/0238 ,  G06F2212/1016

Abstract: Methods and systems for a storage environment are provided, including generating a plurality of child (or tetris) write requests to write data for a write request using a plurality of subdivisions of a plurality of logical zones defined for a plurality of zoned solid state drives (ZNS SSDs) of a RAID array, each LZone mapped to one or more logical RAID zone (RZone) of the ZNS SSDs having a plurality of physical zones across a plurality of independent media units of each ZNS SSD; assigning a sequence number to each child (or tetris) write request corresponding to each subdivision, the sequence number indicating an order in which the child (or tetris) write requests are to be processed; and selecting, based on the assigned sequence number, one or more subdivisions for sequentially writing data to one or more RZones of the plurality of ZNS SSDs.

公开(公告)号：US09411514B2

公开(公告)日：2016-08-09

申请号：US14137084

申请日：2013-12-20

Applicant: NetApp, Inc.

Inventor： James Leong ,  Rajesh Sundaram ,  Douglas P. Doucette ,  Scott Schoenthal ,  Stephen H. Strange ,  Srinivasan Viswanathan

IPC: G06F3/06 ,  G06F9/48 ,  G06F11/20

CPC classification number: G06F3/0601 ,  G06F3/061 ,  G06F3/0611 ,  G06F3/0655 ,  G06F3/0659 ,  G06F3/0689 ,  G06F9/4881 ,  G06F11/2087

Abstract: A data access request to a file system is decomposed into a plurality of lower-level I/O tasks. A logical combination of physical storage components is represented as a hierarchical set of objects. A parent I/O task is generated from a first object in response to the data access request. A child I/O task is generated from a second object to implement a portion of the parent I/O task. The parent I/O task is suspended until the child I/O task completes. The child I/O task is executed in response to an occurrence of an event that a resource required by the child I/O task is available. The parent I/O task is resumed upon an event indicating completion of the child I/O task. Scheduling of any child I/O task is not conditional on execution of the parent I/O task, and a state diagram regulates the child I/O tasks.