公开(公告)号：US20230289326A1

公开(公告)日：2023-09-14

申请号：US18197503

申请日：2023-05-15

Applicant: Cohesity, Inc.

Inventor： Mohit Aron ,  Ganesha Shanmuganathan

IPC: G06F16/176 ,  G06F16/901

CPC classification number: G06F16/1767 ,  G06F16/9024

Abstract: An inode is associated with an incomplete file system operation to a file system object is determined based on an update intent stored in the inode. It is determined that a set of inodes is associated with the incomplete file system operation based on the update intent stored in the inode. The update intent indicates the set of inodes is associated with the incomplete file system operation. It is determined to complete the incomplete file system operation based on evaluating the set of inodes that is associated with the incomplete file system operation. Evaluating the set of inodes that is associated with the incomplete file system operation includes determining whether the set of inodes that is associated with the incomplete file system operation stores a corresponding update intent. The incomplete file system operation is completed based on the evaluation of the set of inodes that is associated with the incomplete file system operation

公开(公告)号：US20220261387A1

公开(公告)日：2022-08-18

申请号：US17672277

申请日：2022-02-15

Applicant: Cohesity, Inc.

Inventor： Vinay Reddy ,  Mohit Aron ,  Vipin Gupta ,  Markose Thomas

IPC: G06F16/22 ,  G06F16/951 ,  G06F16/176 ,  G06F16/23

Abstract: Techniques are disclosed for managing a high performance, fault-tolerant, strongly consistent, distributed key-value store system. The key-value store may store information, such as metadata for a distributed file system. Fault-tolerance means that the distributed key-value store continues to provide access to values in the key-value store in spite of a certain number of node failures. To provide this capability, the key-value store may store copies of (key, value) pair on N+1 nodes in order to provide fault tolerance for the failure of up to N nodes. In addition, metadata describing which nodes store a given value is stored on 2N+1 nodes and the distributed key-value store is sized such that there are 3N+1 nodes in a cluster. Doing so allows the key, value store to tolerate a failure of N nodes, while still maintaining a consistent and available key-value store.

公开(公告)号：US20210382792A1

公开(公告)日：2021-12-09

申请号：US17348401

申请日：2021-06-15

Applicant: Cohesity, Inc.

Inventor： Mohit Aron ,  Zhihuan Qiu ,  Ganesha Shanmuganathan ,  Malini Mahalakshmi Venkatachari

IPC: G06F11/14 ,  G06F16/11 ,  G06F16/13

Abstract: A size associated with a content file is determined to be greater than a threshold size. Contents of the content file split across a plurality of component files are stored. Metadata, for the content file, is updated to reference a plurality of component file metadata structures for the component files. A node of the metadata is configured to track different sizes of portions of the content file stored in different component files of the plurality of component files. File metadata of the content file is split across the plurality of component file metadata structures and each component file metadata structure of the plurality of component file metadata structures specifies a corresponding structure organizing data components for a corresponding portion of the content file.

公开(公告)号：US11023425B2

公开(公告)日：2021-06-01

申请号：US16296707

申请日：2019-03-08

Applicant: Cohesity, Inc.

Inventor： Mohit Aron ,  Ganesha Shanmuganathan

IPC: G06F16/182 ,  G06F16/176 ,  G06F16/18 ,  G06F16/10

Abstract: According to one embodiment of the present disclosure, a first set of file system objects included in performing a requested file system operation is identified in response to a request to perform a file system operation. An update intent corresponding to the requested file system operation is inserted into a data structure associated with each identified file system object. Each file system object corresponding to the corresponding data structure is modified as specified by the update intent in that data structure. After modifying the file system object corresponding to the corresponding data structure, the update intent is removed from that data structure.

公开(公告)号：US20210004301A1

公开(公告)日：2021-01-07

申请号：US16935548

申请日：2020-07-22

Applicant: Cohesity, Inc.

Inventor： Prashant Pogde ,  Sunil Moolchandani ,  Mohit Aron ,  Markose Thomas

IPC: G06F11/14 ,  H04L29/06

Abstract: A method and system for performing incremental backup of a network attached storage (NAS) device are described. A storage capture instance associated with a first time instance is received from a network attached storage device. At least a portion of metadata of tracked network packets associated with the network attached storage device is also received. At least one changed content item of the network attached storage device that has changed since the first time instance is identified by analyzing the at least the portion of the metadata of the tracked network packets received. An incremental backup of the network attached storage device is performed at a second time instance based at least in part on the at least one changed content item identified.

公开(公告)号：US10769033B2

公开(公告)日：2020-09-08

申请号：US16246367

申请日：2019-01-11

Applicant: Cohesity, Inc.

Inventor： Prashant Pogde ,  Sunil Moolchandani ,  Mohit Aron ,  Markose Thomas

IPC: G06F11/14 ,  H04L29/06

Abstract: A method and system for performing incremental backup of a network attached storage (NAS) device are described. A storage capture instance associated with a first time instance is received from a network attached storage device. At least a portion of metadata of tracked network packets associated with the network attached storage device is also received. At least one changed content item of the network attached storage device that has changed since the first time instance is identified by analyzing the at least the portion of the metadata of the tracked network packets received. An incremental backup of the network attached storage device is performed at a second time instance based at least in part on the at least one changed content item identified.

公开(公告)号：US10467216B2

公开(公告)日：2019-11-05

申请号：US15632121

申请日：2017-06-23

Applicant: Cohesity, Inc.

Inventor： Mohit Aron ,  Ganesha Shanmuganathan

IPC: G06F16/22 ,  G06F16/18 ,  G06F16/11 ,  G06F11/14

Abstract: Techniques for cloning, writing to, and reading from file system metadata. Cloning involves identifying a first set of pointers included in a first root node in a file system metadata tree structure that stores file system metadata n leaf nodes of the tree structure, creating a first copy of the first root node that includes the first set of pointers, creating a second copy of the first root node that includes the first set of pointers, associating the first copy with a first view, and associating the second copy with a second view. Reading generally involves traversing the tree structure towards a target leaf node that contains data to be read. Writing generally involves traversing the tree structure n the same manner, but also creating copies of any nodes to be modified if those nodes are deemed to have a different treeID than a particular root node.

公开(公告)号：US10416911B2

公开(公告)日：2019-09-17

申请号：US16110110

申请日：2018-08-23

Applicant: Cohesity, Inc.

Inventor： Mohit Aron ,  Vinay Reddy

IPC: G06F12/00 ,  G06F3/06 ,  G06F11/14 ,  G06F11/20

Abstract: Techniques are disclosed which allow a secondary storage system to provide data to non-production workloads in conjunction with performing data backup and protection tasks. As disclosed, a secondary storage system exposes backup data stored by the secondary storage system to other workloads, such as test and development applications, data analytics, etc. These non-production workloads can run at the same time the secondary storage system provides backup services to a primary storage system. This consolidation eliminates the need for an enterprise to deploy separate storage clusters for analytics, test and development applications, etc. and eliminates unnecessary copies of data.

公开(公告)号：US09921769B2

公开(公告)日：2018-03-20

申请号：US14309869

申请日：2014-06-19

Applicant: Cohesity, Inc.

Inventor： Mohit Aron ,  Vinay Reddy

IPC: G06F3/06 ,  G06F11/14 ,  G06F11/20

CPC classification number: G06F3/0626 ,  G06F3/0617 ,  G06F3/065 ,  G06F3/067 ,  G06F11/1446 ,  G06F11/1448 ,  G06F11/1451 ,  G06F11/1456 ,  G06F11/20 ,  G06F2201/84

Abstract: Techniques are disclosed which allow a secondary storage system to provide data to non-production workloads in conjunction with performing data backup and protection tasks. As disclosed, a secondary storage system exposes backup data stored by the secondary storage system to other workloads, such as test and development applications, data analytics, etc. These non-production workloads can run at the same time the secondary storage system provides backup services to a primary storage system. This consolidation eliminates the need for an enterprise to deploy separate storage clusters for analytics, test and development applications, etc. and eliminates unnecessary copies of data.

公开(公告)号：US20170351701A1

公开(公告)日：2017-12-07

申请号：US15628484

申请日：2017-06-20

Applicant: Cohesity, Inc.

Inventor： Mohit Aron ,  Ganesha Shanmuganathan

IPC: G06F17/30

CPC classification number: G06F17/30194 ,  G06F17/30168

Abstract: Embodiments described herein provide techniques for maintaining consistency in a distributed system (e.g., a distributed secondary storage system). According to one embodiment of the present disclosure, a first set of file system objects included in performing the requested file system operation is identified in response to a request to perform a file system operation. An update intent corresponding to the requested file system operation is inserted into an inode associated with each identified file system object. Each file system object corresponding to the inode is modified as specified by the update intent in that inode. After modifying the file system object corresponding to the inode, the update intent is removed from that inode.