When possible, bail out early when quorum achieved #286
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The beating heart of all consensus based distributed algorithms is to scatter a computation across multiple nodes, then to gather their results, then to evaluate whether quorum is achieved. In some cases, _quorum_ requires gathering all of the nodes' results (e.g., interrogating all nodes for a maximum value for a variable). But in other cases, _quorum_ requires gathering only `n // 2 + 1` nodes' results (e.g., figuring out if > 50% of nodes believe that I'm the owner of a lock). This commit implements the logic to "bail out" early when possible, in the latter case.
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The beating heart of all consensus based distributed algorithms is to
scatter a computation across multiple nodes, then to gather their
results, then to evaluate whether quorum is achieved.
In some cases, quorum requires gathering all of the nodes' results
(e.g., interrogating all nodes for a maximum value for a variable).
But in other cases, quorum requires gathering only
n // 2 + 1nodes'results (e.g., figuring out if > 50% of nodes believe that I'm the owner
of a lock).
This commit implements the logic to "bail out" early when possible, in
the latter case.