Question

Which consensus protocol mechanism prevents the &#x27;split-brain&#x27; scenario by requiring a candidate to receive votes from a majority of nodes to become a leader?

Accepted Answer

The mechanism is called a Quorum. In distributed systems using protocols like Raft or Paxos, a split-brain scenario occurs when a network partition causes nodes to become disconnected, potentially leading multiple nodes to believe they are the leader simultaneously. To prevent this, these protocols mandate that a candidate can only become a leader if it receives votes from a majority of the total nodes in the cluster. A majority is defined as more than half of the total nodes, calculated as (n/2)+1, where n is the number of nodes. Because it is mathematically impossible for two different groups to both hold more than half of the total nodes at the same time, this requirement ensures that only one leader can be elected. If a candidate fails to reach this quorum, no leader is elected for that term, maintaining data consistency and preventing conflicting operations across the network.

Which consensus protocol mechanism prevents the 'split-brain' scenario by requiring a candidate to receive votes from a majority of nodes to become a leader?

The mechanism is called a Quorum. In distributed systems using protocols like Raft or Paxos, a split-brain scenario occurs when a network partition causes nodes to become disconnected, potentially leading multiple nodes to believe they are the leader simultaneously. T....

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Which consensus protocol mechanism prevents the 'split-brain' scenario by requiring a candidate to receive votes from a majority of nodes to become a leader?

The mechanism is called a Quorum. In distributed systems using protocols like Raft or Paxos, a split-brain scenario occurs when a network partition causes nodes to become disconnected, potentially leading multiple nodes to believe they are the leader simultaneously. T....