Cluster Traffic

Cluster Traffic

Clustering is used to maintain the state of the user’s session information so that multiple relays can share the same session information. When a user logs in, their session id is sent to each node of the cluster. A session id is 36 characters. There is a little padding for some cluster data, but packets are still very small. This information is sent between the clusters every 3 min for each user. When a node comes in the cluster, then all of the session information is shared with that node. When a node leaves the cluster, the other nodes are notified of that departure. When a user logs out, their session id is again transferred to the nodes to let everyone know that the session is no longer valid.

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