Leader election in a distributed system based on node weight and leadership priority based on network performance

A non-transitory machine-readable medium storing instructions executable by a processing resource of a distributed system comprising a plurality of nodes coupled in communication via a network, the non-transitory machine-readable medium comprising instructions when executed to:

• categorize a plurality of nodes into at least two clusters based on a geographic location of the plurality of nodes, wherein the plurality of nodes is coupled in communication via a network in a distributed computer system;
• set a leadership priority for each node based at least in part on a respective cluster of the at least two clusters, each node having a vote weight based at least in part on the leadership priority of the node, a vote of each node being biased by the vote weight of the node;
• and
• select one of the plurality of nodes to become a leader node during an election, the selected leader node receiving a number of votes higher than a maximum possible number of votes biased by respective vote weights received by any other node in the cluster.

A system comprising:

• a performance monitor to continuously monitor network performance and/or network latency among a cluster of a plurality of nodes coupled in communication via a network in a distributed computer system;
• a leadership priority controller to:
• categorize a plurality of nodes into at least two clusters;
• set a leadership priority for each node based at least in part on a respective cluster of the at least two clusters, the monitored network performance, and network latency, each node having a vote weight based at least in part on the leadership priority of the node, a vote of each node being biased by the node's vote weight;
• and
• a leader election controller to select one of the plurality of nodes to become a leader node during an election, the selected leader node receiving a number of votes higher than a maximum possible number of votes biased by respective vote weights received by any other node in the cluster.