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- currentTerm: number of the most recent term seen by this server.
- lastReign: number of the most recent term in which this server accepted a message from a leader.
- Vote: the server id and log length of the candidate who has received this server's vote for currentTerm (if any).
- Server id of this server.
- Log entries that have been accepted by the server.
- Id of the most recent log entry that has been accepted by all servers.
- Time of receipt of the last request from the leader.
- Cluster map: id and location of each server in the cluster, whether dead or alive.
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