公开(公告)号：US10275469B2

公开(公告)日：2019-04-30

申请号：US15628484

申请日：2017-06-20

Applicant: Cohesity, Inc.

Inventor： Mohit Aron ,  Ganesha Shanmuganathan

IPC: G06F17/30

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.

公开(公告)号：US20170344590A1

公开(公告)日：2017-11-30

申请号：US15632121

申请日：2017-06-23

Applicant: Cohesity, Inc.

Inventor： Mohit Aron ,  Ganesha Shanmuganathan

IPC: G06F17/30 ,  G06F11/14

CPC classification number: G06F16/2246 ,  G06F11/1435 ,  G06F16/128 ,  G06F16/1873 ,  G06F2201/84

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：US12164799B2

公开(公告)日：2024-12-10

申请号：US18239004

申请日：2023-08-28

Applicant: Cohesity, Inc.

Inventor： Zhihuan Qiu ,  Sachin Jain ,  Anubhav Gupta ,  Apurv Gupta ,  Mohit Aron

IPC: G06F3/06

Abstract: Data associated with a source system is ingested. After the data is ingested, a post-processing metadata conversion process is performed including by selecting an entry of a chunk metadata data structure and determining that a data chunk associated with the selected entry is not referenced by at least a threshold number of objects. In response to determining that the data chunk associated with the selected entry is not referenced by at least the threshold number of objects, metadata of a tree data structure node corresponding to a chunk identifier associated with the data chunk is updated to store a reference to a chunk file storing the data chunk and the selected entry is removed from the chunk metadata data structure.

公开(公告)号：US12164386B2

公开(公告)日：2024-12-10

申请号：US18197491

申请日：2023-05-15

Applicant: Cohesity, Inc.

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

IPC: G06F16/00 ,  G06F11/14 ,  G06F16/11 ,  G06F16/13 ,  G06F16/22

Abstract: A plurality of portions of a content file are stored. It is determined that the content file has a size that is greater than a threshold size. In response to determining that the content file has the size that is greater than the threshold size, a plurality of component file metadata structures are generated for each of the plurality of portions of the content file. A component file metadata structure of the plurality of component file metadata structures corresponds to one of the portions of the content file. Each of the plurality of component file metadata structures includes corresponding metadata that enables data chunks associated with a corresponding portion of the content file to be located.

公开(公告)号：US20240370339A1

公开(公告)日：2024-11-07

申请号：US18618695

申请日：2024-03-27

Applicant: Cohesity, Inc.

Inventor： Gregory Statton ,  Sanjay Poonen ,  Mohit Aron ,  Apurv Gupta

IPC: G06F11/14

Abstract: In general, techniques for efficient data retrieval from a backup system are described. An example computing system includes one or more storage devices and processing circuitry having access to the one or more storage devices and configured to: process an input to generate a filter, wherein the input indicates a context for one or more queries; apply the filter to backup data to obtain filtered data from the backup data; generate an index of embeddings from the filtered data; process, based on the index of embeddings, a query to generate a response for the query; and output the response.

公开(公告)号：US20230401003A1

公开(公告)日：2023-12-14

申请号：US18239004

申请日：2023-08-28

Applicant: Cohesity, Inc.

Inventor： Zhihuan Qiu ,  Sachin Jain ,  Anubhav Gupta ,  Apurv Gupta ,  Mohit Aron

IPC: G06F3/06

CPC classification number: G06F3/0655 ,  G06F3/0679 ,  G06F3/0608 ,  G06F3/0652

Abstract: Data associated with a source system is ingested. After the data is ingested, a post-processing metadata conversion process is performed including by selecting an entry of a chunk metadata data structure and determining that a data chunk associated with the selected entry is not referenced by at least a threshold number of objects. In response to determining that the data chunk associated with the selected entry is not referenced by at least the threshold number of objects, metadata of a tree data structure node corresponding to a chunk identifier associated with the data chunk is updated to store a reference to a chunk file storing the data chunk and the selected entry is removed from the chunk metadata data structure.

公开(公告)号：US11740808B2

公开(公告)日：2023-08-29

申请号：US17218784

申请日：2021-03-31

Applicant: Cohesity, Inc.

Inventor： Mohit Aron ,  Vinay Reddy

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

CPC classification number: G06F3/0626 ,  G06F3/065 ,  G06F3/067 ,  G06F3/0617 ,  G06F11/1446 ,  G06F11/1448 ,  G06F11/1451 ,  G06F11/1456 ,  G06F11/20 ,  H05K999/99 ,  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：US11733871B2

公开(公告)日：2023-08-22

申请号：US16662899

申请日：2019-10-24

Applicant: Cohesity, Inc.

Inventor： Mohit Aron ,  Ganesha Shanmuganathan

IPC: G06F3/06 ,  G06F12/02 ,  G06F12/08

CPC classification number: G06F3/0611 ,  G06F3/0643 ,  G06F3/0656 ,  G06F3/0685 ,  G06F12/0238 ,  G06F3/0673 ,  G06F12/08 ,  G06F2212/1016 ,  G06F2212/217

Abstract: A request to write data corresponding to at least a first portion of a file is received. It is determined whether to perform the request either as an in-place write or as an out-of-place write. Performing the in-place write comprises performing a write to a low latency storage device, and performing the out-of-place write comprises performing a write to a higher latency storage device. The request is performed as either the in-place write or the out-of-place write based on the determination. Performing the request as the in-place write includes writing the data to a first location on a storage tier storing the first portion of the file, and performing the request as the out-of-place write includes writing the data to a second location on one of a plurality of storage tiers of a computing node, other than the first location.

公开(公告)号：US11687494B2

公开(公告)日：2023-06-27

申请号：US16921055

申请日：2020-07-06

Applicant: Cohesity, Inc.

Inventor： Mohit Aron ,  Ganesha Shanmuganathan

IPC: G06F16/176 ,  G06F16/901

CPC classification number: G06F16/1767 ,  G06F16/9024

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.

公开(公告)号：US20210406238A1

公开(公告)日：2021-12-30

申请号：US17475060

申请日：2021-09-14

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 h 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.