Patents by Inventor Wai Leung Chan

Wai Leung Chan 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).

  • Systems and methods for service replication, validation, and recovery in cloud-based systems
    Patent number: 10379966
    Abstract: Systems and methods for replication and validation between a plurality of nodes in a cloud-based system forming a cluster include replicating a database and a software state between the plurality of nodes utilizing a replication algorithm which elects a master of the plurality of nodes and remaining nodes comprising peers, wherein the master is configured to perform the replicating; validating database sequences in the database at all of the plurality of nodes utilizing the replication algorithm to ensure sequential order of the validating between the plurality of nodes; and, responsive to differences between a peer and the master, performing a failure recovery in the database at the peer.
    Type: Grant
    Filed: November 15, 2017
    Date of Patent: August 13, 2019
    Assignee: Zscaler, Inc.
    Inventors: Tejus Gangadharappa, Wai Leung Chan, Dinoja Padmanabhan, Sivaprasad Udupa
  • SYSTEMS AND METHODS FOR SERVICE REPLICATION, VALIDATION, AND RECOVERY IN CLOUD-BASED SYSTEMS
    Publication number: 20190146884
    Abstract: Systems and methods for replication and validation between a plurality of nodes in a cloud-based system forming a cluster include replicating a database and a software state between the plurality of nodes utilizing a replication algorithm which elects a master of the plurality of nodes and remaining nodes comprising peers, wherein the master is configured to perform the replicating; validating database sequences in the database at all of the plurality of nodes utilizing the replication algorithm to ensure sequential order of the validating between the plurality of nodes; and, responsive to differences between a peer and the master, performing a failure recovery in the database at the peer.
    Type: Application
    Filed: November 15, 2017
    Publication date: May 16, 2019
    Inventors: Tejus GANGADHARAPPA, Wai Leung CHAN, Dinoja PADMANABHAN, Sivaprasad UDUPA
  • Multi-router system having shared network interfaces
    Patent number: 9444768
    Abstract: A multi-router system is described in which hardware and software components of one or more standalone routers can be partitioned into multiple logical routers. The multiple logical routers are isolated from each other in terms of routing and forwarding functions yet allow network interfaces to be shared between the logical routers. Moreover, different logical routers can share network interfaces without impacting the ability of any of the logical routers to be independently scaled to meet the bandwidth demands of the customers serviced by the logical router.
    Type: Grant
    Filed: January 25, 2013
    Date of Patent: September 13, 2016
    Assignee: Juniper Networks, Inc.
    Inventors: Sriram Raghunathan, Yong Luo, Wai Leung Chan, Surinder Singh, Abbas Sakarwala, Harmeet Sahni, Jian Cui
  • Multi-router system having shared network interfaces
    Patent number: 8369345
    Abstract: A multi-router system is described in which hardware and software components of one or more standalone routers can be partitioned into multiple logical routers. The multiple logical routers are isolated from each other in terms of routing and forwarding functions yet allow network interfaces to be shared between the logical routers. Moreover, different logical routers can share network interfaces without impacting the ability of any of the logical routers to be independently scaled to meet the bandwidth demands of the customers serviced by the logical router.
    Type: Grant
    Filed: November 13, 2009
    Date of Patent: February 5, 2013
    Assignee: Juniper Networks, Inc.
    Inventors: Sriram Raghunathan, Yong Luo, Wai Leung Chan, Surinder Singh, Abbas Sakarwala, Harmeet Sahni, Jian Cui