Patents by Inventor Dimitar G. Dimitrov

Dimitar G. Dimitrov 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).

  • Passive detection of live systems during controller failover in distributed environments
    Patent number: 10169172
    Abstract: For passive detection of live systems during controller failover in a distributed environment, a set of member systems is sorted according to heartbeat periods used by members in the set of member systems. An amount of elapsed time since a failure of a first controller system in the distributed environment is determined. From the sorted set, a first member system is selected due to a first heartbeat period of the first member system being a shortest heartbeat period in all heartbeat periods in the sorted set of member systems. Using a processor and a memory at a second controller system, a timeout period is computed. The timeout period is an amount of time remaining in the first heartbeat period after the amount of elapsed time. The first member system is removed from the sorted set after the timeout period expires and the first member system has not sent a heartbeat.
    Type: Grant
    Filed: August 11, 2015
    Date of Patent: January 1, 2019
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Steven D. Clay, Roger L. Cundiff, Jr., Dimitar G. Dimitrov, Federico A. Galarraga, Christopher P. Vignola
  • PASSIVE DETECTION OF LIVE SYSTEMS DURING CONTROLLER FAILOVER IN DISTRIBUTED ENVIRONMENTS
    Publication number: 20170046237
    Abstract: For passive detection of live systems during controller failover in a distributed environment, a set of member systems is sorted according to heartbeat periods used by members in the set of member systems. An amount of elapsed time since a failure of a first controller system in the distributed environment is determined. From the sorted set, a first member system is selected due to a first heartbeat period of the first member system being a shortest heartbeat period in all heartbeat periods in the sorted set of member systems. Using a processor and a memory at a second controller system, a timeout period is computed. The timeout period is an amount of time remaining in the first heartbeat period after the amount of elapsed time. The first member system is removed from the sorted set after the timeout period expires and the first member system has not sent a heartbeat.
    Type: Application
    Filed: August 11, 2015
    Publication date: February 16, 2017
    Applicant: International Business Machines Corporation
    Inventors: Steven D. Clay, Roger L. Cundiff, JR., Dimitar G. Dimitrov, Federico A. Galarraga, Christopher P. Vignola