[Linux-cluster] question about 2 nodes cluster

[ESGLinux]

Hi all,
I have one  existential question about two nodes cluster. I have read that
for 2 nodes cluster is necessary a third element to give stabilty to the
cluster.

One way is to add a third node, so its not a 2 nodes cluster. For me its not
an answer because It becomes another kind of cluster ( 3 nodes cluster)

Other, is to use qdisk (this is the way I´m trying nowadays)

My question is if it´s absollutely necesary this third element in the
architecture. and If so which are the options, ?

thanks in advance

ESG
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