公开(公告)号：US11379360B2

公开(公告)日：2022-07-05

申请号：US16911566

申请日：2020-06-25

Applicant: NetApp, Inc.

Inventor： Abhijeet Gole ,  Rohit Singh

IPC: G06F12/02 ,  G06F12/0868 ,  G06F12/0811 ,  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：US20170344282A1

公开(公告)日：2017-11-30

申请号：US15167924

申请日：2016-05-27

Applicant: NetApp, Inc.

Inventor： Ram Kesavan ,  Ananthan Subramanian ,  Hiroshi Ishii ,  Abdul Basit ,  Joseph Brown, JR. ,  Rohit Singh

IPC: G06F3/06

Abstract: A method, non-transitory computer readable medium and storage server computing device that determines when a generated storage operation corresponds with one of a set of predefined storage operations. The storage operation is executed and a result of the execution of the storage operation is withheld from a file system, when the determining indicates that the storage operation corresponds with one of the set of predefined storage operations. A determination is made when a consistency point operation has completed. The result of the execution of the storage operation is presented to the file system, when the determining indicates that a consistency point operation has completed. This technology reduces the number of storage operations that are required to be journaled to maintain consistency of a file system, thereby reducing the runtime resources required to facilitate the journaling and replay resource required to replay the storage operations in a journal following a recovery.

公开(公告)号：US11340812B2

公开(公告)日：2022-05-24

申请号：US17064423

申请日：2020-10-06

Applicant: NETAPP, INC.

Inventor： Jayalakshmi Pattabiraman ,  Nikhil Mattankot ,  Deekshith Belchapada ,  Blake H. Lewis ,  Subramaniam Periyagaram ,  Satya Suresh Chouta Naga Veera ,  Rohit Singh ,  Rajesh Khandelwal ,  James Robert Morefield

IPC: G06F3/06 ,  G06F7/06 ,  G06F12/02

Abstract: A first plurality of block identifiers is sorted based, at least in part, on a measure of spatial locality. A second plurality of block identifiers is sorted based, at least in part, on the measure of spatial locality. At least the first plurality of block identifiers and the second plurality of block identifiers are incrementally merged into a third plurality of block identifiers based, at least in part, on the measure of spatial locality. A block of data corresponding to metadata associated with a plurality of block identifiers of the third plurality of block identifiers is updated.

公开(公告)号：US10983709B2

公开(公告)日：2021-04-20

申请号：US16777346

申请日：2020-01-30

Applicant: NetApp, Inc.

Inventor： Ram Kesavan ,  Ananthan Subramanian ,  Hiroshi Ishii ,  Abdul Basit ,  Joseph Brown ,  Rohit Singh

IPC: G06F3/06

Abstract: Methods, non-transitory computer readable media, and computing devices that execute a storage operation, without journaling the storage operation in a log, and withhold from a file system a list of freed inodes including an indication of an inode freed as a result of the execution of the storage operation. A consistency point operation is then initiated that retrieves storage operations logged as journal entries in the log and commits a result of each of the storage operations to data storage devices. A list of available inodes is updated based on the list of freed inodes, when the consistency point operation is determined to be complete. This technology reduces the number of storage operations that are required to be journaled to maintain consistency of a file system, thereby reducing the runtime resources required to facilitate the journaling and replay resource required to replay the storage operations following a recovery.

公开(公告)号：US20200167084A1

公开(公告)日：2020-05-28

申请号：US16777346

申请日：2020-01-30

Applicant: NetApp, Inc.

Inventor： Ram Kesavan ,  Ananthan Subramanian ,  Hiroshi Ishii ,  Abdul Basit ,  Joseph Brown ,  Rohit Singh

IPC: G06F3/06

Abstract: Methods, non-transitory computer readable media, and computing devices that execute a storage operation, without journaling the storage operation in a log, and withhold from a file system a list of freed inodes including an indication of an inode freed as a result of the execution of the storage operation. A consistency point operation is then initiated that retrieves storage operations logged as journal entries in the log and commits a result of each of the storage operations to data storage devices. A list of available inodes is updated based on the list of freed inodes, when the consistency point operation is determined to be complete. This technology reduces the number of storage operations that are required to be journaled to maintain consistency of a file system, thereby reducing the runtime resources required to facilitate the journaling and replay resource required to replay the storage operations following a recovery.

公开(公告)号：US09965196B2

公开(公告)日：2018-05-08

申请号：US14518157

申请日：2014-10-20

Applicant: NetApp, Inc.

Inventor： Rohit Singh ,  Jungsook Yang ,  Rajesh Khandelwal ,  Jayalakshmi Pattabiraman

IPC: G06F3/06 ,  G06F12/02 ,  G06F9/50 ,  G06F17/30

CPC classification number: G06F3/0613 ,  G06F3/064 ,  G06F3/0683 ,  G06F9/5016 ,  G06F12/023 ,  G06F12/0246 ,  G06F12/0253 ,  G06F12/0261 ,  G06F12/0276 ,  G06F17/30138

Abstract: Storage systems track free blocks using various data structures and maps. For instance, free block maps may contain data blocks with values that indicate whether a block is free or not. When an operation results in a block being freed, the relevant data block in the maps must be written during an I/O operation to update the value. Large numbers of updates my occur after an operation that frees a large numbers of blocks, which can lead to performance degradation. Accordingly, disclosed are systems and methods for deferring updating of free block data tracking structures using logs.