High availability
Neo4j in recent years has adapted to handling larger data in a more reliable manner with the introduction of the high availability mode. Its architecture and operations revolve around a core concept: the algorithm for master election. In this section, we will take a look at why we need the master and the algorithm based on which the master is elected.
HA and the need for a master
High availability in Neo4j replicates the graph on all the machines in the cluster and manages write operations between them. High availability does not decentralize the stored graph (which is called sharding); it replicates the complete graph. One machine in the replica set has the authority to receive and propagate updates as well as keep track of locks ...
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