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).

  • 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
  • Patent number: 8380957
    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: April 24, 2012
    Date of Patent: February 19, 2013
    Inventors: Anand Prahlad, Vijay H. Agrawal
  • Patent number: 8352422
    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: January 8, 2013
    Assignee: CommVault Systems, Inc.
    Inventors: Anand Prahlad, Vijay H. Agrawal
  • Publication number: 20120209809
    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: April 24, 2012
    Publication date: August 16, 2012
    Inventors: Anand Prahlad, Vijay H. Agrawal
  • Patent number: 8166263
    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: July 3, 2008
    Date of Patent: April 24, 2012
    Assignee: CommVault Systems, Inc.
    Inventors: Anand Prahlad, Vijay H. Agrawal
  • Publication number: 20110246416
    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 dath 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 30, 2010
    Publication date: October 6, 2011
    Applicant: COMMVAULT SYSTEMS, INC.
    Inventors: Anand Prahlad, Vijay H. Agrawal
  • Publication number: 20110246429
    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 30, 2010
    Publication date: October 6, 2011
    Applicant: COMMVAULT SYSTEMS, INC.
    Inventors: Anand Prahlad, Vijay H. Agrawal
  • Publication number: 20110246430
    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 30, 2010
    Publication date: October 6, 2011
    Applicant: COMMVAULT SYSTEMS, INC.
    Inventors: Anand Prahlad, Vijay H. Agrawal
  • Publication number: 20110238621
    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: March 29, 2010
    Publication date: September 29, 2011
    Applicant: COMMVAULT SYSTEMS, INC.
    Inventor: Vijay H. Agrawal
  • Patent number: 7962709
    Abstract: Performing data management operations on replicated data in a computer network. Log entries are generated for data management operations of an application executing on a source system. Consistency point entries are used to indicate a time of a known good, or recoverable, state of the application. A destination system is configured to process a copy of the log and consistency point entries to replicate data in a replication volume, the replicated data being a copy of the application data on the source system. When the replicated data represents a known good state of the application, as determined by the consistency point entries, the destination system(s) may perform a storage operation (e.g., snapshot, backup) to copy the replicated data and to logically associate the copied data with a time information (e.g., time stamp) indicative of the source system time when the application was in the known good state.
    Type: Grant
    Filed: December 18, 2006
    Date of Patent: June 14, 2011
    Assignee: CommVault Systems, Inc.
    Inventor: Vijay H. Agrawal
  • Publication number: 20100179941
    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: Application
    Filed: December 9, 2009
    Publication date: July 15, 2010
    Applicant: COMMVAULT SYSTEMS, INC.
    Inventors: Vijay H. Agrawal, Anand Prahlad
  • Publication number: 20100005259
    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: July 3, 2008
    Publication date: January 7, 2010
    Inventors: Anand Prahlad, Vijay H. Agrawal