Ratnesh K Gupta

US Patent:

7958304, Jun 7, 2011

Filed:

Apr 30, 2008

Appl. No.:

12/113065

Inventors:

Atul Goel - Foster City CA, US
James Leong - Hillsborough CA, US
Ratnesh Gupta - Sunnyvale CA, US

Assignee:

Network Appliance, Inc. - Sunnyvale CA

International Classification:

G06F 12/00

US Classification:

711114, 711170, 714 6, 714E11084

Abstract:

Redundant Array of Inexpensive Disks (RAID) groups in a storage system are dynamically reconfigured by merging and splitting the RAID groups. When an indication of a change to data or system characteristics is received, disks in the RAID groups of the storage system can be reorganized to adapt to the change.

US Patent:

8074019, Dec 6, 2011

Filed:

Nov 13, 2007

Appl. No.:

11/939036

Inventors:

Ratnesh Gupta - Sunnyvale CA, US
James Leong - Hillsborough CA, US
Atul Goel - Santa Clara CA, US

Assignee:

Network Appliance, Inc. - Sunnyvale CA

International Classification:

G06F 11/14
G06F 12/00
G06F 13/00

US Classification:

711114, 711118, 711E12069, 714 622, 714 63, 714 15

Abstract:

Storage servers use a fast, non-volatile or persistent memory to store data until it can be written to slower mass storage devices such as disk drives. If the server crashes before a write can complete, the data remains safely stored in non-volatile memory. If the data cannot be committed to disk when the server reboots (e. g. because the destination mass storage device is unavailable), it is stored in a file. When the disk reappears, the data in the file may be used to restore a file or file system on the disk to a consistent state.

US Patent:

8275939, Sep 25, 2012

Filed:

Dec 2, 2011

Appl. No.:

13/310252

Inventors:

Ratnesh Gupta - Sunnyvale CA, US
James Leong - Hillsborough CA, US
Atul Goel - Santa Clara CA, US

Assignee:

Network Appliance, Inc. - Sunnyvale CA

International Classification:

G06F 11/14
G06F 12/00
G06F 13/00

US Classification:

711114, 711118, 711E12069, 714 622, 714 63, 714 15, 714 16, 714E11113

Abstract:

Storage servers use a fast, non-volatile or persistent memory to store data until it can be written to slower mass storage devices such as disk drives. If the server crashes before a write can complete, the data remains safely stored in non-volatile memory. If the data cannot be committed to disk when the server reboots (e. g. because the destination mass storage device is unavailable), it is stored in a file. When the disk reappears, the data in the file may be used to restore a file or filesystem on the disk to a consistent state.

US Patent:

20060107103, May 18, 2006

Filed:

Nov 1, 2004

Appl. No.:

10/980143

Inventors:

Steven Rodrigues - Mountain View CA, US
Ratnesh Gupta - Sunnyvale CA, US

International Classification:

G06F 11/00

US Classification:

714007000

Abstract:

In an embodiment of the invention, a method is provided for updating configuration information associated with a data volume. The method reduces the occurrences of updates of saved configuration information of a data volume by updating the saved configuration information only when a change occurs in a configuration of the data volume.

US Patent:

20220292031, Sep 15, 2022

Filed:

May 31, 2022

Appl. No.:

17/828370

Inventors:

- San Jose CA, US
Ratnesh Gupta - Dublin CA, US
Douglas Doucette - San Diego CA, US

International Classification:

G06F 12/1009

Abstract:

Methods, non-transitory machine readable media, and computing devices that manage resources between multiple hosts coupled to dual-port solid-state disks (SSDs) are disclosed. With this technology, in-core conventional namespace (CNS) and zoned namespace (ZNS) mapping tables are synchronized by a host flash translation layer with on-disk CNS and ZNS mapping tables, respectively. An entry in one of the in-core CNS or ZNS mapping tables is identified based on whether a received storage operation is directed to a CNS or a ZNS of the dual-port SSD. The entry is further identified based on a logical address extracted from the storage operation. The storage operation is serviced using a translation in the identified entry for the logical address, when the storage operation is directed to the CNS, or a zone identifier in the identified entry for a zone of the ZNS, when the storage operation is directed to the ZNS.

US Patent:

20210334215, Oct 28, 2021

Filed:

Apr 24, 2020

Appl. No.:

16/857995

Inventors:

- Sunnyvale CA, US
Rohit Shankar Singh - Cary NC, US
Douglas P. Doucette - San Diego CA, US
Ratnesh Gupta - Dublin CA, US
Sourav Sen - Cupertino CA, US
Prathamesh Deshpande - Folsom CA, US

International Classification:

G06F 12/10

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.

US Patent:

20210334216, Oct 28, 2021

Filed:

Apr 22, 2020

Appl. No.:

16/855243

Inventors:

- Sunnyvale CA, US
Ratnesh Gupta - Dublin CA, US
Douglas Doucette - San Diego CA, US

International Classification:

G06F 12/1009

Abstract:

Methods, non-transitory machine readable media, and computing devices that manage resources between multiple hosts coupled to dual-port solid-state disks (SSDs) are disclosed. With this technology, in-core conventional namespace (CNS) and zoned namespace (ZNS) mapping tables are synchronized by a host flash translation layer with on-disk CNS and ZNS mapping tables, respectively. An entry in one of the in-core CNS or ZNS mapping tables is identified based on whether a received storage operation is directed to a CNS or a ZNS of the dual-port SSD. The entry is further identified based on a logical address extracted from the storage operation. The storage operation is serviced using a translation in the identified entry for the logical address, when the storage operation is directed to the CNS, or a zone identifier in the identified entry for a zone of the ZNS, when the storage operation is directed to the ZNS.

US Patent:

20190286374, Sep 19, 2019

Filed:

May 31, 2019

Appl. No.:

16/428378

Inventors:

- Sunnyvale CA, US
Ratnesh Gupta - Dublin CA, US

Assignee:

NETAPP, INC. - Sunnyvale CA

International Classification:

G06F 3/06
G06F 11/10

Abstract:

Presented herein are methods, non-transitory computer readable media, and devices for selectively limiting the amount of data in a file system, which include: determining a reparity bit value for a write disk block range, wherein the reparity bit is configured to track a number of writes in progress to a stripe range; determining the reparity bit value; updating a threshold written disk block number as a highest disk block number of the reparity bit value; and initiating a RAID operation until it reaches the threshold written disk block number, wherein the threshold written disk block number comprises a maximum written disk block number representing the last disk block number written.