Patents by Inventor Asit A. Desai

Asit A. Desai 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: 11455255
    Abstract: Techniques for improving the read performance of an LFS-based storage system that supports COW snapshotting are provided. In one set of embodiments, the storage system can implement an intermediate map for each storage object in the system that is keyed by a composite key consisting of snapshot identifier (major key) and LBA (minor key). With this approach, contiguous logical block addresses (LBAs) of a storage object or its snapshots will map to contiguous <Snapshot ID, LBA>-to-PBA mappings in the storage object's intermediate map, resulting in good spatial locality for those LBAs and robust read performance.
    Type: Grant
    Filed: May 24, 2021
    Date of Patent: September 27, 2022
    Assignee: VMware, Inc.
    Inventors: Abhay Kumar Jain, Sriram Patil, Wenguang Wang, Enning Xiang, Asit A. Desai
  • Patent number: 8341460
    Abstract: A backup method for a computer system network avoids generating hashes from data that may be inaccurate due to network errors affords verification of source data written to backup media includes reading at a network client a portion of the source data from a source storage volume and generating a hash of the source data at the client. The source data and hash are transmitted to a backup server and written to the backup media. The hash is written to the backup media is associated with the backup data corresponding to the source data from which the hash was generated. Verification of the backup data is performed by reading the backup data from the backup media, generating a hash from the backup data read, and comparing that hash with the hash originally stored on the backup media.
    Type: Grant
    Filed: August 8, 2011
    Date of Patent: December 25, 2012
    Assignee: EMC Corporation
    Inventors: Asit A. Desai, Antony E. Boggis
  • Publication number: 20120209811
    Abstract: A backup method for a computer system network avoids generating hashes from data that may be inaccurate due to network errors affords verification of source data written to backup media includes reading at a network client a portion of the source data from a source storage volume and generating a hash of the source data at the client. The source data and hash are transmitted to a backup server and written to the backup media. The hash is written to the backup media is associated with the backup data corresponding to the source data from which the hash was generated. Verification of the backup data is performed by reading the backup data from the backup media, generating a hash from the backup data read, and comparing that hash with the hash originally stored on the backup media.
    Type: Application
    Filed: August 8, 2011
    Publication date: August 16, 2012
    Inventors: Asit A. Desai, Antony E. Boggis
  • Patent number: 8015441
    Abstract: A backup method for a computer system network avoids generating hashes from data that may be inaccurate due to network errors affords verification of source data written to backup media includes reading at a network client a portion of the source data from a source storage volume and generating a hash of the source data at the client. The source data and hash are transmitted to a backup server and written to the backup media. The hash is written to the backup media is associated with the backup data corresponding to the source data from which the hash was generated. Verification of the backup data is performed by reading the backup data from the backup media, generating a hash from the backup data read, and comparing that hash with the hash originally stored on the backup media.
    Type: Grant
    Filed: February 3, 2006
    Date of Patent: September 6, 2011
    Assignee: EMC Corporation
    Inventors: Asit A. Desai, Antony E. Boggis
  • Patent number: 7966513
    Abstract: A method of automatically classifying clients into different backup policy groups according to pre-selected criteria, such as type of client, whether the client is a server, a desktop or a mobile computer, the department or business unit, or even the user. The method uses information obtained from the client itself to classify the client. This information includes the kind of processor platform and operating system in the client, the type and version of software being run, and whether the client has a battery, indicating that it is a mobile computer. Other information that can be used to classify the client for backup may be obtained from information that identifies the user, the department to which the client is assigned, and the location in which it is used. The process enables a mobile client traveling to another site of an enterprise to connect to a local LAN of the enterprise and be authenticated for backup, and to be automatically assigned an appropriate backup classification.
    Type: Grant
    Filed: February 3, 2006
    Date of Patent: June 21, 2011
    Assignee: EMC Corporation
    Inventors: Asit A. Desai, Richard C. Zulch
  • Patent number: 7890746
    Abstract: A method of automatically authenticating clients on a computer system network enables clients on the network to be automatically logged in and added to a backup database and assigned for backup. The method employs a public key/private key encryption system in which clients have a public key and the backup server has a private key. The backup server interrogates new clients to determine client status and whether the client supports the public key/private key certificate. If it does, the backup server uses key values from the client decrypted using its private key to generate encryption keys which are employed in an algorithm for securely communicating with the client to log the client into a backup database. Otherwise, the backup server uses a password entered by a user in the client for generating the encryption keys. Additionally, the method enables backup software and public keys to be automatically push installed on the clients.
    Type: Grant
    Filed: February 3, 2006
    Date of Patent: February 15, 2011
    Assignee: EMC Corporation
    Inventors: Asit A. Desai, Richard C. Zulch
  • Patent number: 7421551
    Abstract: A backup method for a computer system that affords fast verification of source data written to backup media includes reading a portion of the source data from a source storage volume and generating a hash of the source data. The source data is written to the backup media as backup data, and the hash generated from the source data is written to the backup media and associated with the backup data corresponding to the source data from which the hash was generated. Verification of the backup data can be subsequently performed by reading the backup data from the backup media, generating a hash from the backup data read, and comparing that hash with the hash originally stored on the backup media. This enables the backup data to be verified as corresponding to the original source data without the necessity of rereading the source data from the source volume, and enables faster, more accurate off line verification subsequent to the backup process.
    Type: Grant
    Filed: February 3, 2006
    Date of Patent: September 2, 2008
    Assignee: EMC Corporation
    Inventors: Asit A. Desai, Antony E. Boggis