Domain-based Raft consensus selection of leader nodes in distributed data services

A domain-based server-selection non-transitory machine-readable medium storing one or more sequences of instructions, wherein execution of said one or more instructions by one or more processors contained in a system causes said system to perform the actions of:

• (a) providing a distributed data service operative based on a plurality of nodes in a domain;
• (b) sharding data, based on temporal activity, across data stores coupled to the plurality of nodes;
• (c) determining one or more domain attributes for each of said plurality of nodes in the domain;
• (d) if at least one of said domain attributes exceeds a threshold:
• (i) nominating, by the plurality of nodes in the domain, at least one candidate node based on the domain attributes;
• (ii) electing, by the plurality of nodes in the domain, a leader node from the candidate nodes based on which of said plurality of nodes has a highest of said domain attributes;
• (iii) designating, each of said plurality of nodes in the domain other than the leader node as follower nodes;
• (iv) executing, by the leader node, leader transactions for a leader shard coupled to the leader node;
• (v) executing, by the follower nodes, follower transactions for follower shards coupled to the follower nodes;
• and
• (e) if none of said domain attributes exceeds the threshold, using a consensus selection process to vote on and select said leader node and designate said follower nodes.

A domain-based server-selection digital processing system comprising:

• (a) one or more processors;
• and
• (b) memory to store processor-executable instructions, wherein said one or more processors retrieve said instructions and execute said instructions, wherein execution of said instructions causes said digital processing system to perform the actions of:
• (i) providing a distributed data service operative based on a plurality of nodes in a domain;
• (ii) sharding data, based on temporal activity, across data stores coupled to the plurality of nodes;
• (iii) determining one or more domain attributes for each of said plurality of nodes in the domain;
• (iv) if at least one of said domain attributes exceeds a threshold:
• (1) nominating, by the plurality of nodes in the domain, at least one candidate node based on the domain attributes;
• (2) electing, by the plurality of nodes in the domain, a leader node from the candidate nodes based on which of said plurality of nodes has a highest of said domain attributes;
• (3) designating, each of said plurality of nodes in the domain other than the leader node as follower nodes;
• (4) executing, by the leader node, leader transactions for a leader shard coupled to the leader node;
• (5) executing, by the follower nodes, follower transactions for follower shards coupled to the follower nodes;
• and
• (v) if none of said domain attributes exceeds the threshold, using a consensus selection process to vote on and select said leader node and designate said follower nodes.