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Thanks for the promt response :-)
So here's my understanding, please correct me if my understanding is wrong...
Node failure - TD will restart once for sure doesnt matter what the configuration is.
Node failure - If it doesnt have any Hot stand by node, TD has to restart once as mentioned above, in addition to that we have to schedule a restart so that the components will migrate to the original node. 2 restarts and some performance degradation
Node failure - If a Hot stand by node is configured, then TD has to restart once as mentioned above, and there is no further restart is required. Once the failed node is back online it becomes the new hot stand by node. 1 restart and no performance degradation.