公开(公告)号：US20250086109A1

公开(公告)日：2025-03-13

申请号：US18790854

申请日：2024-07-31

Applicant: NetApp, Inc.

Inventor： Abhijeet GOLE ,  Rohit SINGH

IPC: G06F12/02 ,  G06F11/10 ,  G06F12/0811 ,  G06F12/0868 ,  G06F12/0873

Abstract: Methods, non-transitory machine readable media, and computing devices that manage storage operations directed to dual-port solid state disks (SSDs) coupled to multiple hosts are disclosed. With this technology, context metadata comprising a checksum is retrieved based on a first physical address mapped, in a cached zoned namespace (ZNS) mapping table, to a logical address. The logical address is extracted from a request to read a portion of a file. A determination is made when the checksum is valid based on a comparison to identification information extracted from the request and associated with the file portion. At least the first physical address is replaced in the cached ZNS mapping table with a second physical address retrieved from an on-disk ZNS mapping table, when the determination indicates the checksum is invalid. The file portion retrieved from a dual-port SSD using the second physical address is returned to service the request.

公开(公告)号：US20230259460A1

公开(公告)日：2023-08-17

申请号：US18140808

申请日：2023-04-28

Applicant: NetApp, Inc.

Inventor： Abhijeet GOLE ,  Ratnesh Gupta ,  Douglas Doucette

IPC: G06F12/1009

CPC classification number: G06F12/1009 ,  G06F2212/154 ,  G06F2212/214 ,  G06F2212/1021

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.

公开(公告)号：US20220300419A1

公开(公告)日：2022-09-22

申请号：US17831529

申请日：2022-06-03

Applicant: NetApp, Inc.

Inventor： Abhijeet GOLE ,  Rohit SINGH

IPC: G06F12/02 ,  G06F12/0811 ,  G06F12/0868 ,  G06F12/0873

Abstract: Methods, non-transitory machine readable media, and computing devices that manage storage operations directed to dual-port solid state disks (SSDs) coupled to multiple hosts are disclosed. With this technology, context metadata comprising a checksum is retrieved based on a first physical address mapped, in a cached zoned namespace (ZNS) mapping table, to a logical address. The logical address is extracted from a request to read a portion of a file. A determination is made when the checksum is valid based on a comparison to identification information extracted from the request and associated with the file portion. At least the first physical address is replaced in the cached ZNS mapping table with a second physical address retrieved from an on-disk ZNS mapping table, when the determination indicates the checksum is invalid. The file portion retrieved from a dual-port SSD using the second physical address is returned to service the request.

公开(公告)号：US20230393977A1

公开(公告)日：2023-12-07

申请号：US18121389

申请日：2023-03-14

Applicant: NetApp, Inc.

Inventor： Abhijeet GOLE ,  Rohit SINGH

IPC: G06F12/02 ,  G06F11/10

CPC classification number: G06F12/0292 ,  G06F12/0246 ,  G06F11/1004 ,  G06F2212/7201

Abstract: Methods, non-transitory machine readable media, and computing devices that manage storage operations directed to dual-port solid state disks (SSDs) coupled to multiple hosts are disclosed. With this technology, context metadata comprising a checksum is retrieved based on a first physical address mapped, in a cached zoned namespace (ZNS) mapping table, to a logical address. The logical address is extracted from a request to read a portion of a file. A determination is made when the checksum is valid based on a comparison to identification information extracted from the request and associated with the file portion. At least the first physical address is replaced in the cached ZNS mapping table with a second physical address retrieved from an on-disk ZNS mapping table, when the determination indicates the checksum is invalid. The file portion retrieved from a dual-port SSD using the second physical address is returned to service the request.

公开(公告)号：US20220292031A1

公开(公告)日：2022-09-15

申请号：US17828370

申请日：2022-05-31

Applicant: NetApp, Inc.

Inventor： Abhijeet GOLE ,  Ratnesh Gupta ,  Douglas Doucette

IPC: G06F12/1009

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.