Grid quorum

AN!Wiki :: Grid quorum

A Grid Quorum system is one where the nodes (n) in the cluster are arranged in an k^2 arrangement. Quorum is determined by having all nodes in one horizontal row plus at least one node from each row below it.

Here is an example of a 25-node cluster in a 5 x 5 grid;

01	02	03	04	05
06	07	08	09	10
11	12	13	14	15
16	17	18	19	20
21	22	23	24	25

An example of this grid having quorum would be votes from;

01	02	03	04	05
06	07	08	09	10
11	12	13	14	15
16	17	18	19	20
21	22	23	24	25

To learn more, please see:

• Principles of Distributed Computing (pdf) by Christian Cachin.
• The Quorum Deployment Problem (ppt) by Seth Gilbert and Grzegorz Malewicz.

 

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