Grokking System Design Fundamentals
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birolandhiscat
"R + W > N" -> N should be total nodes in cluster, not total nodes in quorum group.

birolandhiscat

Dec 2, 2023

For 3 nodes A,B,C quorum group has size 2. However if we do 1 write (A) and 2 reads (B and C) we are not reading up-to-date data, despite 1 + 2 > 2.

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sai manoj
sai manoja year ago

Key Concepts of Quorum

  1. Quorum Definition:
    • A quorum is the smallest subset of nodes that must agree on a decision for it to be executed. This typically involves majority voting, where more than half of the nodes must participate in the decision-making pr...

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