Dubt on Cluster Quorum

[yena]

Hello,
i have a 6 nodes cluster.
If i shut down 3 Nodes, replication stop working with message NO Quorum but i hav 3 survivors nodes.

I thought the minimum number of nodes to have a quorum was 3 .. and so
why don't I have a quorum if I die 3 knots out of 6?

Thanks!

 

[danielb]

Quorum needs more than half the nodes alive. That's why you need 3 nodes for HA as it's the minimum to be able to have strictly more than half the nodes (2). In your case, you need 4 nodes alive to keep the quorum