Arris Enterprises LLC

Dan Leverett Clark

David Alfred Romrell

A method for storing session state data of a session between a system having a plurality of nodes and a client device includes delivering a service to the client device during a session identified or otherwise specified by a session identifier. The service is delivered by a first of the plurality of nodes in the system. During the session, at least a second node in the system is selected on which session state data associated with the session is to be saved. The second node is selected based on the session identifier such that another node in the system is able to locate the session state data when stored on the second node from the session identifier without contacting a centralized mechanism that specifies where session state data is stored. The session state data is saved to the second node that is selected.

Distributed storage of state information and session recovery using state information

A method for obtaining previously stored session state data for a session between a system having a plurality of nodes and a client device includes obtaining a session identifier specifying the session and hashing the session identifier. A currently valid hash map is searched. The hash map maps a hash of the session identifier to the nodes for a current system configuration. The search is performed to identify a system node on which the session state data for the session is stored. If the session state data is not located using the currently valid hash map, at least one earlier generation hash map that is valid for a previous configuration of the system is searched. Upon identifying the system node on which the session state data is stored, the session state data from the system node is retrieved. The session state data is used to establish the session.

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Portland, OR, United States of America

Dan Leverett Clark