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Dynamic membership management in a distributed system

  • US 8,719,227 B1
  • Filed: 03/04/2013
  • Issued: 05/06/2014
  • Est. Priority Date: 04/13/2005
  • Status: Active Grant
First Claim
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1. A method for dynamically managing a persistent membership of a coordination group in a distributed environment, the coordination group including a number of sites included in the persistent membership, with one or more of the sites including a database and a registrar, the method comprising:

  • receiving, by a registrar of a first site that is a member of the persistent membership, a Membership Request from an entrant seeking to become a member of the persistent membership, the first site having participated in at least one quorum;

    modifying, by the registrar of the first site, the persistent membership for the entrant;

    responsive to the registrar receiving the Membership Request, disconnecting the registrar of the first site from the coordination group and inhibiting, by a distributed lock manager, updates to a first database while cotemporaneous to the inhibition of the updates the registrar of the first site initializes an entrant database for the entrant; and

    reconnecting, by the registrar of the first site, to the coordination group after initialization of the entrant database.

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