Patents by Inventor Vijay H. Agrawal

Vijay H. Agrawal has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20190250826
    Abstract: An illustrative ISCSI server computing device provides user computing devices with “private writable snapshots” of a desired volume of data and/or further provides “private writable backup copies.” The ISCSI service is provided without invoking snapshot limits imposed by storage arrays and further without specialized backup software and pseudo-disk drivers installed on the user computing devices. A user can browse as well as edit personal versions of any number and/or versions of block-level backup copies—the “private writable backup copies.” Likewise, a user can browse and edit personal versions of any number of snapshots of one or more versions of one or more desired data volumes—the “private writable snapshots.” A user can have any number of co-existing private writable snapshots and private writable backup copies. Sparse files, extent-files, software snapshots, and/or media agents co-residing on the ISCSI server are used in the illustrative embodiments.
    Type: Application
    Filed: May 16, 2018
    Publication date: August 15, 2019
    Inventors: Sunil Kumar GUTTA, Vijay H. AGRAWAL
  • Publication number: 20190250827
    Abstract: An illustrative ISCSI server computing device provides user computing devices with “private writable snapshots” of a desired volume of data and/or further provides “private writable backup copies.” The ISCSI service is provided without invoking snapshot limits imposed by storage arrays and further without specialized backup software and pseudo-disk drivers installed on the user computing devices. A user can browse as well as edit personal versions of any number and/or versions of block-level backup copies—the “private writable backup copies.” Likewise, a user can browse and edit personal versions of any number of snapshots of one or more versions of one or more desired data volumes—the “private writable snapshots.” A user can have any number of co-existing private writable snapshots and private writable backup copies. Sparse files, extent-files, software snapshots, and/or media agents co-residing on the ISCSI server are used in the illustrative embodiments.
    Type: Application
    Filed: May 16, 2018
    Publication date: August 15, 2019
    Inventors: Sunil Kumar GUTTA, Vijay H. AGRAWAL
  • Publication number: 20190087108
    Abstract: Systems and methods for performing file-level restore operations for block-level data volumes are described. In some embodiments, the systems and methods restore data from a block-level data volume contained in secondary storage by receiving a request to restore one or more files from the block-level data volume, mounting a virtual disk to the block-level data volume, accessing one or more mount paths established by the virtual disk between the data agent and the block-level data volume, and browsing data from one or more files within the block-level data volume via the established one or more mount paths provided by the virtual disk.
    Type: Application
    Filed: November 6, 2018
    Publication date: March 21, 2019
    Inventors: Sri Karthik Bhagi, Sunil Kumar Gutta, Vijay H. Agrawal, Rahul S. Pawar
  • Patent number: 10168929
    Abstract: Systems and methods for performing file-level restore operations for block-level data volumes are described. In some embodiments, the systems and methods restore data from a block-level data volume contained in secondary storage by receiving a request to restore one or more files from the block-level data volume, mounting a virtual GUID Partition Table (GPT) disk to the block-level data volume, accessing one or more mount paths established by the virtual GPT disk between the data agent and the block-level data volume, and browsing data from one or more files within the block-level data volume via the established one or more mount paths provided by the virtual GPT disk.
    Type: Grant
    Filed: September 15, 2017
    Date of Patent: January 1, 2019
    Assignee: Commvault Systems, Inc.
    Inventors: Sri Karthik Bhagi, Sunil Kumar Gutta, Vijay H. Agrawal, Rahul S. Pawar
  • Publication number: 20180129435
    Abstract: Systems and methods for performing file-level restore operations for block-level data volumes are described. In some embodiments, the systems and methods restore data from a block-level data volume contained in secondary storage by receiving a request to restore one or more files from the block-level data volume, mounting a virtual GUID Partition Table (GPT) disk to the block-level data volume, accessing one or more mount paths established by the virtual GPT disk between the data agent and the block-level data volume, and browsing data from one or more files within the block-level data volume via the established one or more mount paths provided by the virtual GPT disk.
    Type: Application
    Filed: September 15, 2017
    Publication date: May 10, 2018
    Inventors: Sri Karthik Bhagi, Sunil Kumar Gutta, Vijay H. Agrawal, Rahul S. Pawar
  • Patent number: 9766825
    Abstract: Systems and methods for performing file-level restore operations for block-level data volumes are described. In some embodiments, the systems and methods restore data from a block-level data volume contained in secondary storage by receiving a request to restore one or more files from the block-level data volume, mounting a virtual GUID Partition Table (GPT) disk to the block-level data volume, accessing one or more mount paths established by the virtual GPT disk between the data agent and the block-level data volume, and browsing data from one or more files within the block-level data volume via the established one or more mount paths provided by the virtual GPT disk.
    Type: Grant
    Filed: July 22, 2015
    Date of Patent: September 19, 2017
    Assignee: Commvault Systems, Inc.
    Inventors: Sri Karthik Bhagi, Sunil Kumar Gutta, Vijay H. Agrawal, Rahul S. Pawar
  • Publication number: 20170024152
    Abstract: Systems and methods for performing file-level restore operations for block-level data volumes are described. In some embodiments, the systems and methods restore data from a block-level data volume contained in secondary storage by receiving a request to restore one or more files from the block-level data volume, mounting a virtual GUID Partition Table (GPT) disk to the block-level data volume, accessing one or more mount paths established by the virtual GPT disk between the data agent and the block-level data volume, and browsing data from one or more files within the block-level data volume via the established one or more mount paths provided by the virtual GPT disk.
    Type: Application
    Filed: July 22, 2015
    Publication date: January 26, 2017
    Inventors: Sri Karthik Bhagi, Sunil Kumar Gutta, Vijay H. Agrawal, Rahul S. Pawar
  • Patent number: 9495382
    Abstract: Systems and methods for performing intelligent replication of production data on a source storage device. In certain examples, a full backup of the production data is first performed and stored on a destination system. A journal module on the storage device (e.g., a shared storage device), or on at least one source system, tracks files on the storage device that change during a particular period of time. Following this period, a snapshot is taken of the production data. Upon mounting the snapshot, the replication system uses the journal information to identify modified files, conduct a block-level comparison of only the modified files with corresponding files on the destination system, and identify the particular data blocks that changed. The replication system then replicates only the changed blocks to the destination system. Certain systems further store information indicating a source system time of a known good state of the production data.
    Type: Grant
    Filed: December 9, 2009
    Date of Patent: November 15, 2016
    Assignee: Commvault Systems, Inc.
    Inventors: Vijay H. Agrawal, Anand Prahlad
  • Patent number: 9483511
    Abstract: Stubbing systems and methods are provided for intelligent data management in a replication environment, such as by reducing the space occupied by replication data on a destination system. In certain examples, stub files or like objects replace migrated, de-duplicated or otherwise copied data that has been moved from the destination system to secondary storage. Access is further provided to the replication data in a manner that is transparent to the user and/or without substantially impacting the base replication process. In order to distinguish stub files representing migrated replication data from replicated stub files, priority tags or like identifiers can be used. Thus, when accessing a stub file on the destination system, such as to modify replication data or perform a restore process, the tagged stub files can be used to recall archived data prior to performing the requested operation so that an accurate copy of the source data is generated.
    Type: Grant
    Filed: March 12, 2015
    Date of Patent: November 1, 2016
    Assignee: Commvault Systems, Inc.
    Inventors: Anand Prahlad, Vijay H. Agrawal
  • Publication number: 20150248444
    Abstract: Stubbing systems and methods are provided for intelligent data management in a replication environment, such as by reducing the space occupied by replication data on a destination system. In certain examples, stub files or like objects replace migrated, de-duplicated or otherwise copied data that has been moved from the destination system to secondary storage. Access is further provided to the replication data in a manner that is transparent to the user and/or without substantially impacting the base replication process. In order to distinguish stub files representing migrated replication data from replicated stub files, priority tags or like identifiers can be used. Thus, when accessing a stub file on the destination system, such as to modify replication data or perform a restore process, the tagged stub files can be used to recall archived data prior to performing the requested operation so that an accurate copy of the source data is generated.
    Type: Application
    Filed: March 12, 2015
    Publication date: September 3, 2015
    Inventors: Anand Prahlad, Vijay H. Agrawal
  • Patent number: 9002785
    Abstract: Stubbing systems and methods are provided for intelligent data management in a replication environment, such as by reducing the space occupied by replication data on a destination system. In certain examples, stub files or like objects replace migrated, de-duplicated or otherwise copied data that has been moved from the destination system to secondary storage. Access is further provided to the replication data in a manner that is transparent to the user and/or without substantially impacting the base replication process. In order to distinguish stub files representing migrated replication data from replicated stub files, priority tags or like identifiers can be used. Thus, when accessing a stub file on the destination system, such as to modify replication data or perform a restore process, the tagged stub files can be used to recall archived data prior to performing the requested operation so that an accurate copy of the source data is generated.
    Type: Grant
    Filed: July 31, 2013
    Date of Patent: April 7, 2015
    Assignee: CommVault Systems, Inc.
    Inventors: Anand Prahlad, Vijay H. Agrawal
  • Patent number: 8868494
    Abstract: Systems and methods for performing data replication are disclosed. Determining whether to update replicated data typically involves comparison of readily obtainable attributes of a given source file and its corresponding replicated file. Such attributes can be obtained from, for example, metadata. In certain situations, an additional assessment of the source and replicated files can be beneficial. For example, if integrity of an existing replicated file's content is maintained, one may not want to re-replicate the corresponding source file. For large source files, such a decision can provide substantial reductions in expenditures of available computing and network resources. In certain embodiments, a threshold for identifying such large files can be based on one or more operating parameters such as network type and available bandwidth. In certain embodiments, replication file's integrity can be checked by calculating and comparing checksums for the replication file and its corresponding source file.
    Type: Grant
    Filed: August 2, 2013
    Date of Patent: October 21, 2014
    Assignee: CommVault Systems, Inc.
    Inventor: Vijay H. Agrawal
  • Patent number: 8838923
    Abstract: A portable data protection system is described for protecting, transferring or copying data using continuous data protection (CDP) over intermittent or occasional connections between a computer system or mobile device containing the data to be protected, transferred or copied, called a data source, and one or more computer systems that receive the data, called a data target. CDP can be broken down logically into two phases: 1) detecting changes to data on a data source and 2) replicating the changes to a data target. The portable data protection system uses a method that performs the first phase continuously or near continuously on the data source, and the second phase when a connection is available between the data source and the data target.
    Type: Grant
    Filed: December 10, 2013
    Date of Patent: September 16, 2014
    Assignee: CommVault Systems, Inc.
    Inventors: Anand Prahlad, Vijay H. Agrawal
  • Patent number: 8725698
    Abstract: Stubbing systems and methods are provided for intelligent data management in a replication environment, such as by reducing the space occupied by replication data on a destination system. In certain examples, stub files or like objects replace migrated, de-duplicated or otherwise copied data that has been moved from the destination system to secondary storage. Access is further provided to the replication data in a manner that is transparent to the user and/or without substantially impacting the base replication process. In order to distinguish stub files representing migrated replication data from replicated stub files, priority tags or like identifiers can be used. Thus, when accessing a stub file on the destination system, such as to modify replication data or perform a restore process, the tagged stub files can be used to recall archived data prior to performing the requested operation so that an accurate copy of the source data is generated.
    Type: Grant
    Filed: March 30, 2010
    Date of Patent: May 13, 2014
    Assignee: CommVault Systems, Inc.
    Inventors: Anand Prahlad, Vijay H. Agrawal
  • Publication number: 20140101399
    Abstract: A portable data protection system is described for protecting, transferring or copying data using continuous data protection (CDP) over intermittent or occasional connections between a computer system or mobile device containing the data to be protected, transferred or copied, called a data source, and one or more computer systems that receive the data, called a data target. CDP can be broken down logically into two phases: 1) detecting changes to data on a data source and 2) replicating the changes to a data target. The portable data protection system uses a method that performs the first phase continuously or near continuously on the data source, and the second phase when a connection is available between the data source and the data target.
    Type: Application
    Filed: December 10, 2013
    Publication date: April 10, 2014
    Applicant: COMMVAULT SYSTEMS, INC.
    Inventors: Anand Prahlad, Vijay H. Agrawal
  • Publication number: 20140074777
    Abstract: Systems and methods for performing data replication are disclosed. Determining whether to update replicated data typically involves comparison of readily obtainable attributes of a given source file and its corresponding replicated file. Such attributes can be obtained from, for example, metadata. In certain situations, an additional assessment of the source and replicated files can be beneficial. For example, if integrity of an existing replicated file's content is maintained, one may not want to re-replicate the corresponding source file. For large source files, such a decision can provide substantial reductions in expenditures of available computing and network resources. In certain embodiments, a threshold for identifying such large files can be based on one or more operating parameters such as network type and available bandwidth. In certain embodiments, replication file's integrity can be checked by calculating and comparing checksums for the replication file and its corresponding source file.
    Type: Application
    Filed: August 2, 2013
    Publication date: March 13, 2014
    Applicant: CommVault Systems, Inc.
    Inventor: Vijay H. Agrawal
  • Publication number: 20140067764
    Abstract: Stubbing systems and methods are provided for intelligent data management in a replication environment, such as by reducing the space occupied by replication data on a destination system. In certain examples, stub files or like objects replace migrated, de-duplicated or otherwise copied data that has been moved from the destination system to secondary storage. Access is further provided to the replication data in a manner that is transparent to the user and/or without substantially impacting the base replication process. In order to distinguish stub files representing migrated replication data from replicated stub files, priority tags or like identifiers can be used. Thus, when accessing a stub file on the destination system, such as to modify replication data or perform a restore process, the tagged stub files can be used to recall archived data prior to performing the requested operation so that an accurate copy of the source data is generated.
    Type: Application
    Filed: July 31, 2013
    Publication date: March 6, 2014
    Applicant: COMMVAULT SYSTEMS, INC.
    Inventors: Anand Prahlad, Vijay H. Agrawal
  • Patent number: 8612707
    Abstract: A portable data protection system is described for protecting, transferring or copying data using continuous data protection (CDP) over intermittent or occasional connections between a computer system or mobile device containing the data to be protected, transferred or copied, called a data source, and one or more computer systems that receive the data, called a data target. CDP can be broken down logically into two phases: 1) detecting changes to data on a data source and 2) replicating the changes to a data target. The portable data protection system uses a method that performs the first phase continuously or near continuously on the data source, and the second phase when a connection is available between the data source and the data target.
    Type: Grant
    Filed: February 14, 2013
    Date of Patent: December 17, 2013
    Assignee: CommVault Systems, Inc.
    Inventors: Anand Prahlad, Vijay H. Agrawal
  • Patent number: 8504515
    Abstract: Stubbing systems and methods are provided for intelligent data management in a replication environment, such as by reducing the space occupied by replication data on a destination system. In certain examples, stub files or like objects replace migrated, de-duplicated or otherwise copied data that has been moved from the destination system to secondary storage. Access is further provided to the replication data in a manner that is transparent to the user and/or without substantially impacting the base replication process. In order to distinguish stub files representing migrated replication data from replicated stub files, priority tags or like identifiers can be used. Thus, when accessing a stub file on the destination system, such as to modify replication data or perform a restore process, the tagged stub files can be used to recall archived data prior to performing the requested operation so that an accurate copy of the source data is generated.
    Type: Grant
    Filed: March 30, 2010
    Date of Patent: August 6, 2013
    Assignee: CommVault Systems, Inc.
    Inventors: Anand Prahlad, Vijay H. Agrawal
  • Patent number: 8504517
    Abstract: Systems and methods for performing data replication are disclosed. Determining whether to update replicated data typically involves comparison of readily obtainable attributes of a given source file and its corresponding replicated file. Such attributes can be obtained from, for example, metadata. In certain situations, an additional assessment of the source and replicated files can be beneficial. For example, if integrity of an existing replicated file's content is maintained, one may not want to re-replicate the corresponding source file. For large source files, such a decision can provide substantial reductions in expenditures of available computing and network resources. In certain embodiments, a threshold for identifying such large files can be based on one or more operating parameters such as network type and available bandwidth. In certain embodiments, replication file's integrity can be checked by calculating and comparing checksums for the replication file and its corresponding source file.
    Type: Grant
    Filed: March 29, 2010
    Date of Patent: August 6, 2013
    Assignee: CommVault Systems, Inc.
    Inventor: Vijay H. Agrawal