Patents by Inventor Nagaraj Lalsangi

Nagaraj Lalsangi 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).

  • Usage of OP logs to synchronize across primary and secondary storage clusters of a cross-site distributed storage system and lightweight OP logging
    Patent number: 11893261
    Abstract: In one embodiment, a method comprises maintaining state information regarding a data synchronous replication status for a storage object of a primary storage cluster and a replicated storage object of a secondary storage cluster. The method includes temporarily disallowing input/output (I/O) operations for the storage object when the storage object of the primary storage cluster has a failure, which causes an internal state as out of sync for the storage object while maintaining an external state as in sync for external entities. The method performs persistent inflight tracking and reconciliation of I/O operations with a first Op log of the primary storage cluster and a second Op log of the secondary storage cluster and performs a resynchronization between the storage object and the replicated storage object based on the persistent inflight tracking and reconciliation of I/O operations.
    Type: Grant
    Filed: October 26, 2021
    Date of Patent: February 6, 2024
    Assignee: NetApp, Inc.
    Inventors: Krishna Murthy Chandraiah Setty Narasingarayanapeta, Akhil Kaushik, Nagaraj Lalsangi
  • USAGE OF OP LOGS TO SYNCHRONIZE ACROSS PRIMARY AND SECONDARY STORAGE CLUSTERS OF A CROSS-SITE DISTRIBUTED STORAGE SYSTEM AND LIGHTWEIGHT OP LOGGING
    Publication number: 20220357854
    Abstract: In one embodiment, a method comprises maintaining state information regarding a data synchronous replication status for a storage object of a primary storage cluster and a replicated storage object of a secondary storage cluster. The method includes temporarily disallowing input/output (I/O) operations for the storage object when the storage object of the primary storage cluster has a failure, which causes an internal state as out of sync for the storage object while maintaining an external state as in sync for external entities. The method performs persistent inflight tracking and reconciliation of I/O operations with a first Op log of the primary storage cluster and a second Op log of the secondary storage cluster and performs a resynchronization between the storage object and the replicated storage object based on the persistent inflight tracking and reconciliation of I/O operations.
    Type: Application
    Filed: October 26, 2021
    Publication date: November 10, 2022
    Inventors: Krishna Murthy Chandraiah Setty Narasingarayanapeta, Akhil Kaushik, Nagaraj Lalsangi
  • DYNAMIC LINK DISTANCE CONFIGURATION FOR EXTENDED FABRIC
    Publication number: 20090274169
    Abstract: A method to dynamically allocate credits for a particular port to port link based on measured link distance during the initial interswitch link configuration process. An apparatus implementing such method or a software upgrade to retrofit existing switches.
    Type: Application
    Filed: July 8, 2009
    Publication date: November 5, 2009
    Applicant: BROCADE COMMUNICATIONS SYSTEMS, INC.
    Inventors: NAGARAJ LALSANGI, BALAKRISHMA WUSIRIKA
  • Dynamic link distance configuration for extended fabric
    Patent number: 7600035
    Abstract: A method to dynamically allocate credits for a particular port to port link based on measured link distance during the initial interswitch link configuration process. An apparatus implementing such method or a software upgrade to retrofit existing switches.
    Type: Grant
    Filed: January 31, 2003
    Date of Patent: October 6, 2009
    Assignee: Brocade Communications Systems, Inc.
    Inventors: Nagaraj Lalsangi, Balakrishma Wusirika
  • Dynamic link distance configuration for extended fabric
    Publication number: 20040153566
    Abstract: A method to dynamically allocate credits for a particular port to port link based on measured link distance during the initial interswitch link configuration process. An apparatus implementing such method or a software upgrade to retrofit existing switches.
    Type: Application
    Filed: January 31, 2003
    Publication date: August 5, 2004
    Applicant: Brocade Communications Systems, Inc.
    Inventors: Nagaraj Lalsangi, Balakrishma Wusirika