Leader Election
Definition
- Leader Election is the process used in a distributed system that elects the leader among the servers in a cluster to entrust primarily services.
- Other servers in a cluster stand by while the leader works. If the Leader is down, elect another leader through the election process.
Consensus Algorithm
- This algorithm enables the server group in a distributed system to reach consensus on that single data value like ‘Leader’.
- These consensus guarantee the consistency and integrity of the system.
Paxos & Raft
- These two algorithms are the most famous consensus algorithms used in distributed systems.
- Paxos: This consensus algorithm guarantee the data synchronization and consistence state.
- Raft: Raft is a consensus algorithm that ensures consistent data and reliable leader election in distributed systems, valued for its simplicity and effectiveness.
Etcd
- Etcd is a key-value store that guarantees strongly consistent and highly available using Raft consensus algorithm .
ZooKeeper
- ZooKeeper is a strongly consistent, highly available key-value store. It’s often used to store important configurations or to perform leader elections.
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