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Can M3 run on two nodes only?

Question asked by qpwschung on Jun 30, 2011
Latest reply on Jun 3, 2013 by peterconrad
The documentation specifies that the node size is from 3 up. I only have two machines. Is is possible to still setup a functioning cluster with guaranteed no data loss? What is the reason that three is the minimum cluster size? It seems that one active node and a standby node should be enough to ensure everything is backed up. I seem to remember not too long ago, redundancy means two for everything.

I can possibly live with the fact that the failover is not automatic and have to manually restart the crashed server. I understand that zookeeper requires three nodes to allow one node to fail. If automatic failover is not required, is it possible to configure a two nodes cluster.

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