Leader Election Algorithms in Distributed Systems?

A Distributed system is an application which executes a collection of protocols to coordinate the actions of multiple processes on a network, such that all components cooperate together in order to perform a single or small set of related tasks. It is very difficult for processes to cooperate with each other because of failures of any of the process during communication. The leader election is critical problem in distributed system as data is distributed among different node which is geographically separated. To maintain co-ordination between the node, leader node have to be selected. This paper contains the information about the various existing leader election mechanisms which is used for selecting the leader in different problems.