- Patent Title: Systems and methods to retain existing connections so that there is no connection loss when nodes are added to a cluster for capacity or when a node is taken out from the cluster for maintenance
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Application No.: US15670749Application Date: 2017-08-07
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Publication No.: US11089113B2Publication Date: 2021-08-10
- Inventor: Sandhya Gopinath , Sathaiah Dontula , Ranjith Nath
- Applicant: Citrix Systems, Inc.
- Applicant Address: US FL Fort Lauderdale
- Assignee: Citrix Systems, Inc.
- Current Assignee: Citrix Systems, Inc.
- Current Assignee Address: US FL Fort Lauderdale
- Agency: Foley & Lardner LLP
- Main IPC: H04L29/08
- IPC: H04L29/08 ; H04L12/24 ; H04L29/14 ; H04L12/743 ; H04L12/26

Abstract:
Described embodiments provide systems and methods for pushing session information to a newly joined node in a cluster of nodes. In the cluster, each node may maintain a session table of existing sessions. One or more nodes may detect a new node has joined the cluster. Each node, responsive to the detection, may apply a hash function on a tuple of each session of the existing sessions in the session table of the node to determine whether one or more existing sessions are identified to be owned by the new node as a result of the hash function. Each node, responsive to identifying that one or more sessions are to be owned by the new node, may push corresponding session information to the new node. The new node may become configured to receive a packet corresponding to the one or more sessions and to process the packet.
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