Patents by Inventor Devang K. Shah
Devang K. Shah 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).
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Patent number: 11880343Abstract: A method and apparatus for replicating a data container of a source storage server at the logical level in an unordered stream of individual data units are described. In certain embodiments, the replication operations can be performed without regard to the differences in geometry of physical persistent storage of the source and destination storage servers and without regard to the differences in data container format of the source and destination storage servers. An initial replication operation of the source data container is performed by transferring the data objects within the source data container to a replica data container in the destination storage server as an unordered stream of individual data units while preserving data object identifiers of the source data objects. Afterwards, incremental replication operations can be performed to capture modifications to the source data container over time after the initial replication operation.Type: GrantFiled: November 30, 2020Date of Patent: January 23, 2024Assignee: NetApp, Inc.Inventors: Bruce Leverett, Michael Kazar, Alan Stuart Driscoll, Peter Frank Corbett, Devang K. Shah, Srishylam Simharajan, Toby Smith
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Publication number: 20210081369Abstract: A method and apparatus for replicating a data container of a source storage server at the logical level in an unordered stream of individual data units are described. In certain embodiments, the replication operations can be performed without regard to the differences in geometry of physical persistent storage of the source and destination storage servers and without regard to the differences in data container format of the source and destination storage servers. An initial replication operation of the source data container is performed by transferring the data objects within the source data container to a replica data container in the destination storage server as an unordered stream of individual data units while preserving data object identifiers of the source data objects. Afterwards, incremental replication operations can be performed to capture modifications to the source data container over time after the initial replication operation.Type: ApplicationFiled: November 30, 2020Publication date: March 18, 2021Inventors: Bruce Leverett, Michael Kazar, Alan Stuart Driscoll, Peter Frank Corbett, Devang K. Shah, Srishylam Simharajan, Toby Smith
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Patent number: 10860542Abstract: A method and apparatus for replicating a data container of a source storage server at the logical level in an unordered stream of individual data units are described. In certain embodiments, the replication operations can be performed without regard to the differences in geometry of physical persistent storage of the source and destination storage servers and without regard to the differences in data container format of the source and destination storage servers. An initial replication operation of the source data container is performed by transferring the data objects within the source data container to a replica data container in the destination storage server as an unordered stream of individual data units while preserving data object identifiers of the source data objects. Afterwards, incremental replication operations can be performed to capture modifications to the source data container over time after the initial replication operation.Type: GrantFiled: May 1, 2017Date of Patent: December 8, 2020Assignee: NetApp Inc.Inventors: Bruce Leverett, Michael Kazar, Alan Stuart Driscoll, Peter Frank Corbett, Devang K. Shah, Srishylam Simharajan, Toby Smith
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Patent number: 10852958Abstract: A system and method for hijacking inodes based on replication operations received in an arbitrary order is used to assist a data replication operation from a source storage system to a destination storage system. The source storage system generates a set of replication operations as part of a replication process and transmits the replication operations in an arbitrary order. After receiving a replication operation, the system determines whether the operation is inconsistent with a corresponding destination inode. If an inconsistency exists, the system hijacks the destination inode by replacing the destination inode's metadata with data determined based on the replication operation. The system may also delete metadata from the inode and/or initialize metadata to default values if the metadata was not replaced based on the replication operation. The system then waits for a second replication operation that contains the remaining metadata and replaces the metadata based on the second replication operation.Type: GrantFiled: December 21, 2017Date of Patent: December 1, 2020Assignee: NetApp Inc.Inventors: Devang K. Shah, Alan S. Driscoll
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Publication number: 20180165026Abstract: A system and method for hijacking inodes based on replication operations received in an arbitrary order is used to assist a data replication operation from a source storage system to a destination storage system. The source storage system generates a set of replication operations as part of a replication process and transmits the replication operations in an arbitrary order. After receiving a replication operation, the system determines whether the operation is inconsistent with a corresponding destination inode. If an inconsistency exists, the system hijacks the destination inode by replacing the destination inode's metadata with data determined based on the replication operation. The system may also delete metadata from the inode and/or initialize metadata to default values if the metadata was not replaced based on the replication operation. The system then waits for a second replication operation that contains the remaining metadata and replaces the metadata based on the second replication operation.Type: ApplicationFiled: December 21, 2017Publication date: June 14, 2018Inventors: Devang K. Shah, Alan S. Driscoll
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Patent number: 9858001Abstract: A system and method for hijacking inodes based on replication operations received in an arbitrary order is used to assist a data replication operation from a source storage system to a destination storage system. The source storage system generates a set of replication operations as part of a replication process and transmits the replication operations in an arbitrary order. After receiving a replication operation, the system determines whether the operation is inconsistent with a corresponding destination inode. If an inconsistency exists, the system hijacks the destination inode by replacing the destination inode's metadata with data determined based on the replication operation. The system may also delete metadata from the inode and/or initialize metadata to default values if the metadata was not replaced based on the replication operation. The system then waits for a second replication operation that contains the remaining metadata and replaces the metadata based on the second replication operation.Type: GrantFiled: January 22, 2016Date of Patent: January 2, 2018Assignee: NETAPP, INC.Inventors: Devang K. Shah, Alan S. Driscoll
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Publication number: 20170249329Abstract: A method and apparatus for replicating a data container of a source storage server at the logical level in an unordered stream of individual data units are described. In certain embodiments, the replication operations can be performed without regard to the differences in geometry of physical persistent storage of the source and destination storage servers and without regard to the differences in data container format of the source and destination storage servers. An initial replication operation of the source data container is performed by transferring the data objects within the source data container to a replica data container in the destination storage server as an unordered stream of individual data units while preserving data object identifiers of the source data objects. Afterwards, incremental replication operations can be performed to capture modifications to the source data container over time after the initial replication operation.Type: ApplicationFiled: May 1, 2017Publication date: August 31, 2017Inventors: Bruce Leverett, Michael Kazar, Alan Stuart Driscoll, Peter Frank Corbett, Devang K. Shah, Srishylam Simharajan, Toby Smith
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Patent number: 9659026Abstract: A method and apparatus for replicating a data container of a source storage server at the logical level in an unordered stream of individual data units are described. In certain embodiments, the replication operations can be performed without regard to the differences in geometry of physical persistent storage of the source and destination storage servers and without regard to the differences in data container format of the source and destination storage servers. An initial replication operation of the source data container is performed by transferring the data objects within the source data container to a replica data container in the destination storage server as an unordered stream of individual data units while preserving data object identifiers of the source data objects. Afterwards, incremental replication operations can be performed to capture modifications to the source data container over time after the initial replication operation.Type: GrantFiled: December 31, 2013Date of Patent: May 23, 2017Assignee: NetApp, Inc.Inventors: Bruce Leverett, Michael Kazar, Alan Stuart Driscoll, Peter Frank Corbett, Devang K. Shah, Srishylam Simharajan, Toby Smith
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Publication number: 20160139843Abstract: A system and method for hijacking inodes based on replication operations received in an arbitrary order is used to assist a data replication operation from a source storage system to a destination storage system. The source storage system generates a set of replication operations as part of a replication process and transmits the replication operations in an arbitrary order. After receiving a replication operation, the system determines whether the operation is inconsistent with a corresponding destination inode. If an inconsistency exists, the system hijacks the destination inode by replacing the destination inode's metadata with data determined based on the replication operation. The system may also delete metadata from the inode and/or initialize metadata to default values if the metadata was not replaced based on the replication operation. The system then waits for a second replication operation that contains the remaining metadata and replaces the metadata based on the second replication operation.Type: ApplicationFiled: January 22, 2016Publication date: May 19, 2016Applicant: NETAPP, INC.Inventors: Devang K. Shah, Alan S. Driscoll
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Patent number: 9244626Abstract: A system and method for hijacking inodes based on replication operations received in an arbitrary order is used to assist a data replication operation from a source storage system to a destination storage system. The source storage system generates a set of replication operations as part of a replication process and transmits the replication operations in an arbitrary order. After receiving a replication operation, the system determines whether the operation is inconsistent with a corresponding destination inode. If an inconsistency exists, the system hijacks the destination inode by replacing the destination inode's metadata with data determined based on the replication operation. The system may also delete metadata from the inode and/or initialize metadata to default values if the metadata was not replaced based on the replication operation. The system then waits for a second replication operation that contains the remaining metadata and replaces the metadata based on the second replication operation.Type: GrantFiled: January 22, 2014Date of Patent: January 26, 2016Assignee: NETAPP, INC.Inventors: Devang K. Shah, Alan S. Driscoll
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Patent number: 9183208Abstract: Many applications and computing environments, such as data storage systems, provide data backup and restoration features. It may be advantageous to provide file level backups that may be accessible to a user through a directory structure of a file system. Accordingly, fileshots comprising backup data of a file may be stored as metadata of the file. For example, a fileshot may be stored within a stream directory as a hidden stream linked off of the file. Fileshots may be associated within a directory interface (e.g., a command prompt or graphical user interface), which may be presented to a user. In this way, the user may access and/or manage fileshots through the directory interface (e.g., the user may create fileshots, restore files with fileshots, copy fileshots, etc.). Additionally, fileshot metadata may be maintained for fileshots. The fileshot metadata may be used to locate fileshot and/or perform fileshot commands.Type: GrantFiled: December 24, 2010Date of Patent: November 10, 2015Assignee: NetApp, Inc.Inventors: Anuja Jaiswal, Nikul Patel, Devang K. Shah
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Patent number: 9128942Abstract: Many applications and computing environments allow users to migrate data from a source object to a target object (e.g., a file may be cut/pasted, copied, etc.). It may be advantageous to provide users with access to the data (e.g., migrated data at the target object and/or data that has yet to be migrated from the source object) before all of the data is completely migrated (e.g., a user may otherwise have to wait hours for a 2 TB file to be copied between various data volumes). Accordingly, as provided herein, migration of a source object to a target object may be declared as completed, even though the target object may not comprise all of the data that is to be migrated. In this way, an I/O request may be satisfied based upon migrated data within the target object and/or data, not yet migrated, retrieved on-demand from the source object.Type: GrantFiled: December 24, 2010Date of Patent: September 8, 2015Assignee: NetApp, Inc.Inventors: Jeffrey Pfau, Devang K. Shah, Amber Palekar, Ashish Prakash
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Publication number: 20140195490Abstract: A method and apparatus for replicating a data container of a source storage server at the logical level in an unordered stream of individual data units are described. In certain embodiments, the replication operations can be performed without regard to the differences in geometry of physical persistent storage of the source and destination storage servers and without regard to the differences in data container format of the source and destination storage servers. An initial replication operation of the source data container is performed by transferring the data objects within the source data container to a replica data container in the destination storage server as an unordered stream of individual data units while preserving data object identifiers of the source data objects. Afterwards, incremental replication operations can be performed to capture modifications to the source data container over time after the initial replication operation.Type: ApplicationFiled: December 31, 2013Publication date: July 10, 2014Inventors: Bruce Leverett, Michael Kazar, Alan Stuart Driscoll, Peter Frank Corbett, Devang K. Shah, Srishylam Simharajan, Toby Smith
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Publication number: 20140136805Abstract: A system and method for hijacking inodes based on replication operations received in an arbitrary order is used to assist a data replication operation from a source storage system to a destination storage system. The source storage system generates a set of replication operations as part of a replication process and transmits the replication operations in an arbitrary order. After receiving a replication operation, the system determines whether the operation is inconsistent with a corresponding destination inode. If an inconsistency exists, the system hijacks the destination inode by replacing the destination inode's metadata with data determined based on the replication operation. The system may also delete metadata from the inode and/or initialize metadata to default values if the metadata was not replaced based on the replication operation. The system then waits for a second replication operation that contains the remaining metadata and replaces the metadata based on the second replication operation.Type: ApplicationFiled: January 22, 2014Publication date: May 15, 2014Applicant: NETAPP, INC.Inventors: Devang K. Shah, Alan S. Driscoll
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Patent number: 8671072Abstract: A system and method for hijacking inodes based on replication operations received in an arbitrary order is used to assist a data replication operation from a source storage system to a destination storage system. The source storage system generates a set of replication operations as part of a replication process and transmits the replication operations in an arbitrary order. After receiving a replication operation, the system determines whether the operation is inconsistent with a corresponding destination inode. If an inconsistency exists, the system hijacks the destination inode by replacing the destination inode's metadata with data determined based on the replication operation. The system may also delete metadata from the inode and/or initialize metadata to default values if the metadata was not replaced based on the replication operation. The system then waits for a second replication operation that contains the remaining metadata and replaces the metadata based on the second replication operation.Type: GrantFiled: September 14, 2009Date of Patent: March 11, 2014Assignee: NetApp, Inc.Inventors: Devang K. Shah, Alan S. Driscoll
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Patent number: 8655848Abstract: A method and apparatus for replicating a data container of a source storage server at the logical level in an unordered stream of individual data units are described. In certain embodiments, the replication operations can be performed without regard to the differences in geometry of physical persistent storage of the source and destination storage servers and without regard to the differences in data container format of the source and destination storage servers. An initial replication operation of the source data container is performed by transferring the data objects within the source data container to a replica data container in the destination storage server as an unordered stream of individual data units while preserving data object identifiers of the source data objects. Afterwards, incremental replication operations can be performed to capture modifications to the source data container over time after the initial replication operation.Type: GrantFiled: February 26, 2010Date of Patent: February 18, 2014Assignee: NetApp, Inc.Inventors: Bruce Leverett, Michael Kazar, Srishylam Simharajan, Peter Frank Corbett, Toby Smith, Alan Stuart Driscoll, Devang K. Shah
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Patent number: 8326798Abstract: A replication operation service migrates data from a source volume having a source file system type to a destination volume having a destination file system type, where the source file system type may be different from the destination file system type. The replication operation is completed without interrupting the operations of a client device in the system. A stable copy of the source file system is generated on the source volume. A file system agnostic representation of a portion of the data in the source volume is generated from the stable copy. The representation is transmitted to the destination volume where it is converted to conform to the destination file system type.Type: GrantFiled: September 14, 2009Date of Patent: December 4, 2012Assignee: Network Appliance, Inc.Inventors: Alan Stuart Driscoll, Peter Frank Corbett, Toby Smith, Devang K. Shah, Srishylam Simharajan, Keith Allen Arner, Joe Warren Dukes, Jr.
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Patent number: 5991790Abstract: A system for properly delivering an signals in a computer system. A first module is called which waits for a signal to be generated. Upon a signal being generated, the first module is notified of the signal's generation. The first module then directs the signal to a second module, and causes the signal to be delivered to the second module.Type: GrantFiled: July 1, 1996Date of Patent: November 23, 1999Assignee: Sun Microsystems, Inc.Inventors: Devang K. Shah, John Zolnowsky