What is the best synchronization method in a ClusterXL deployment?

In a ClusterXL deployment, using a dedicated sync interface is considered the best synchronization method. This approach enhances performance and reliability when synchronizing state information between cluster members.

By designating a specific interface for synchronization, you separate it from the interfaces used for data traffic, which minimizes competition for bandwidth and reduces latency in state information updates. This is crucial because real-time synchronization of connection states and routing information between cluster members is necessary to maintain seamless failover and high availability in the event of a member going down.

Additionally, a dedicated sync interface helps enhance security by isolating sync traffic from user data traffic, consequently reducing the risk of synchronization data being intercepted or affected by external factors.

While other options may involve complex configurations with multiple clusters and sync processes, they do not provide the same focused simplicity and efficacy in ensuring optimal performance and reliability for synchronization in a ClusterXL deployment.