公开(公告)号：US10514984B2

公开(公告)日：2019-12-24

申请号：US15055484

申请日：2016-02-26

Applicant: NetApp, Inc.

Inventor： David Anthony Slik ,  Shehbaz Jaffer ,  Sethuraman Subbiah ,  Keith Arnold Smith ,  Giridhar Appaji Nag Yasa ,  Atish Kathpal

IPC: G06F11/00 ,  G06F11/10 ,  H03M13/15 ,  G06F3/06 ,  H03M13/13 ,  H03M13/37

Abstract: A rebuild node of a storage system can assess risk of the storage system not being able to provide a data object. The rebuild node(s) uses information about data object fragments to determine health of a data object, which relates to the risk assessment. The rebuild node obtains object fragment information from nodes throughout the storage system. With the object fragment information, the rebuild node(s) can assess object risk based, at least in part, on the object fragments indicated as existing by the nodes. To assess object risk, the rebuild node(s) treats absent object fragments (i.e., those for which an indication was not received) as lost. When too many object fragments are lost, an object cannot be rebuilt. The erasure coding technique dictates the threshold number of fragments for rebuilding an object. The risk assessment per object influences rebuild of the objects.

公开(公告)号：US10379742B2

公开(公告)日：2019-08-13

申请号：US14979873

申请日：2015-12-28

Applicant: NetApp, Inc.

Inventor： Maxim Gerard Smith ,  John William Haskins, Jr. ,  David Anthony Slik ,  Keith Arnold Smith

IPC: G06F3/06 ,  G11B20/12

Abstract: A storage system writes an object across zones of a set of zones (“zone set”). Each zone of a zone set is contributed from an independently accessible storage medium. To create a zone set, the storage system arbitrarily selects disks to contribute a zone for membership in the zone set. This results in a fairly even distribution of zone sets throughout the storage system, which increases fault tolerance of the storage system. Although disk selection for zone set membership is arbitrary, the arbitrary selection can be from a pool of disks that satisfy one or more criteria (e.g., health or activity based criteria). In addition, weights can be assigned to disks to influence the arbitrary selection. Although manipulating the arbitrary selection with weights or by reducing the pool of disks reduces the arbitrariness, this evenly distributes zone sets while accounting for client demand and/or disk health.

公开(公告)号：US11838363B2

公开(公告)日：2023-12-05

申请号：US16364384

申请日：2019-03-26

Applicant: NetApp Inc.

Inventor： David Slik ,  Keith Arnold Smith

IPC: H04L67/565 ,  H04L67/5682 ,  G06F11/10 ,  G06F3/06 ,  H04L67/1095 ,  H04L67/63 ,  H04L67/563 ,  H04L67/12

CPC classification number: H04L67/12 ,  G06F3/0604 ,  G06F3/065 ,  G06F3/067 ,  G06F3/0619 ,  G06F3/0641 ,  G06F3/0683 ,  G06F11/1004 ,  H04L67/1095 ,  H04L67/563 ,  H04L67/565 ,  H04L67/5682 ,  H04L67/63

Abstract: Techniques are provided for offloading the management of sensor data and generating custom views of sensor data. Sensor data received from a data network through a message is stored within storage managed by a computing device. A handle is generated to identify the sensor data. The sensor data within the message is replaced with the handle, and the message is transmitted to a device within the data network. The device may use handles of sensor data to request custom views of sensor data.

公开(公告)号：US20170178680A1

公开(公告)日：2017-06-22

申请号：US14978729

申请日：2015-12-22

Applicant: NetApp, Inc.

Inventor： John William Haskins, JR. ,  David Anthony Slik ,  Keith Arnold Smith ,  Maxim Gerald Smith

IPC: G11B20/10 ,  G11B20/12 ,  G11B20/18 ,  G06F3/06

CPC classification number: G11B20/1217 ,  G06F3/0619 ,  G06F3/0644 ,  G06F3/065 ,  G06F3/0676 ,  G11B20/1889 ,  G11B2020/1893

Abstract: A method includes receiving a write request to write a current data block to a Shingled Magnetic Recording (SMR) storage device. In response, the current data block is written to a current physical block in an open zone of the SMR storage device. A corresponding copy of the current data block is written to a nonvolatile memory. A determination is made of whether a wandering write error occurred during the writing of the data to the open zone. In response to the wandering write error occurring, for each of the number of written physical blocks in the open zone that have the corresponding copy in the nonvolatile memory, the data in the physical block is validated using the corresponding copy. In response to validation, the data in the corresponding copy is written as corrected data for the physical block to a new zone in the SMR storage device.

公开(公告)号：US20170123714A1

公开(公告)日：2017-05-04

申请号：US15224255

申请日：2016-07-29

Applicant: NetApp, Inc.

Inventor： Maxim Gerard Smith ,  John William Haskins, Jr. ,  David Anthony Slik ,  Keith Arnold Smith

IPC: G06F3/06

CPC classification number: G06F3/0643 ,  G06F3/0619 ,  G06F3/0676

Abstract: A durable file system has been designed for storage devices that do not support write in place and/or that are susceptible to errors or failures. The durable file system also facilitates organization and access of large objects (e.g., gigabytes to terabytes in size). Regardless of whether target storage devices are configured with sequential write constraints, the durable file system writes object fragments across a set of sequences or ranges of storage units, such as logical blocks. The durable file system sequentially writes an object fragment into each storage unit sequence along with indexing information for the object fragments. In addition to writing the indexing information for the object fragments into the set of storage unit sequences, the durable file system updates the file system index with the object indexing information.

公开(公告)号：US11431801B2

公开(公告)日：2022-08-30

申请号：US16364365

申请日：2019-03-26

Applicant: NetApp Inc.

Inventor： David Slik ,  Keith Arnold Smith

IPC: H04L67/12 ,  G06F11/10 ,  G06F3/06 ,  H04L67/1095 ,  H04L67/563 ,  H04L67/565 ,  H04L67/5682 ,  H04L67/63

Abstract: Techniques are provided for offloading the management of sensor data and generating custom views of sensor data. Sensor data received from a data network through a message is stored within storage managed by a computing device. A handle is generated to identify the sensor data. The sensor data within the message is replaced with the handle, and the message is transmitted to a device within the data network. The device may use handles of sensor data to request custom views of sensor data.

公开(公告)号：US10055162B2

公开(公告)日：2018-08-21

申请号：US14928594

申请日：2015-10-30

Applicant: NetApp, Inc.

Inventor： William Karl Jannen ,  Peter Macko ,  Stephen Michael Byan ,  James F. Lentini ,  Keith Arnold Smith

IPC: G06F3/06

CPC classification number: G06F3/064 ,  G06F3/061 ,  G06F3/0656 ,  G06F3/0676

Abstract: A write request is received to write a data block having a logical block address to a nonvolatile storage device. The method includes writing a value of the data block to the nonvolatile storage device. The writing includes locating a position in a tree-based data structure that includes first and second nodes. The first node is configured to store a first set of data blocks having logical block addresses in a first numerical range, and the second node is configured to store a second set of data blocks having logical block addresses in a second numerical range. The position is located in the first node or the second node depending on the value of the logical block address. The writing includes storing the value of the data block in the position in the tree-based data structure.

公开(公告)号：US20170249213A1

公开(公告)日：2017-08-31

申请号：US15055484

申请日：2016-02-26

Applicant: NetApp, Inc.

Inventor： David Anthony Slik ,  Shehbaz Jaffer ,  Sethuraman Subbiah ,  Keith Arnold Smith ,  Giridhar Appaji Nag Yasa ,  Atish Kathpal

IPC: G06F11/10 ,  G06F3/06 ,  H03M13/15

Abstract: A rebuild node of a storage system can assess risk of the storage system not being able to provide a data object. The rebuild node(s) uses information about data object fragments to determine health of a data object, which relates to the risk assessment. The rebuild node obtains object fragment information from nodes throughout the storage system. With the object fragment information, the rebuild node(s) can assess object risk based, at least in part, on the object fragments indicated as existing by the nodes. To assess object risk, the rebuild node(s) treats absent object fragments (i.e., those for which an indication was not received) as lost. When too many object fragments are lost, an object cannot be rebuilt. The erasure coding technique dictates the threshold number of fragments for rebuilding an object. The risk assessment per object influences rebuild of the objects.

公开(公告)号：US20170123665A1

公开(公告)日：2017-05-04

申请号：US14928594

申请日：2015-10-30

Applicant: NetApp, Inc.

Inventor： William Karl Jannen ,  Peter Macko ,  Stephen Michael Byan ,  James F. Lentini ,  Keith Arnold Smith

IPC: G06F3/06

CPC classification number: G06F3/064 ,  G06F3/061 ,  G06F3/0656 ,  G06F3/0676

Abstract: A write request is received to write a data block having a logical block address to a nonvolatile storage device. The method includes writing a value of the data block to the nonvolatile storage device. The writing includes locating a position in a tree-based data structure that includes first and second nodes. The first node is configured to store a first set of data blocks having logical block addresses in a first numerical range, and the second node is configured to store a second set of data blocks having logical block addresses in a second numerical range. The position is located in the first node or the second node depending on the value of the logical block address. The writing includes storing the value of the data block in the position in the tree-based data structure.

公开(公告)号：US20190251996A1

公开(公告)日：2019-08-15

申请号：US16394212

申请日：2019-04-25

Applicant: NetApp, Inc.

Inventor： John William Haskins, JR. ,  David Anthony Slik ,  Keith Arnold Smith ,  Maxim Gerald Smith

IPC: G11B20/12 ,  G06F3/06 ,  G11B20/18

CPC classification number: G11B20/1217 ,  G06F3/0619 ,  G06F3/0644 ,  G06F3/065 ,  G06F3/0676 ,  G11B20/1889 ,  G11B2020/1893

Abstract: A method includes receiving a write request to write a current data block to a Shingled Magnetic Recording (SMR) storage device. In response, the current data block is written to a current physical block in an open zone of the SMR storage device. A corresponding copy of the current data block is written to a nonvolatile memory. A determination is made of whether a wandering write error occurred during the writing of the data to the open zone. In response to the wandering write error occurring, for each of the number of written physical blocks in the open zone that have the corresponding copy in the nonvolatile memory, the data in the physical block is validated using the corresponding copy. In response to validation, the data in the corresponding copy is written as corrected data for the physical block to a new zone in the SMR storage device.