What establishes a quorum in a 4-node cluster?
What establishes a quorum in a 4-node cluster?
In a clustered computing environment, particularly with NetApp systems, epsilon is a concept that provides an additional fractional vote to help maintain quorum. In a 4-node cluster, epsilon helps to ensure that even if one node fails, the cluster can still reach a consensus. This is essential for the reliable operation of the cluster.
B Epsilon Agree
B is Correct
https://docs.netapp.com/us-en/ontap/system-admin/quorum-epsilon-concept.html
No, the correct answer is not B. Epsilon is not a service that establishes a quorum in a 4-node cluster. Epsilon is an extra fractional vote that enables quorum in a 2-node cluster1 Epsilon is automatically assigned to one of the nodes in a 2-node cluster and does not change unless manually reassigned by the administrator
B is the answer. Your explanation about Epsilon adding a fractional weight is Correct, but you are wrong about epsilon in 2-node cluster. There is no epsilon in a 2-node cluster. Do me a favour, click the link below and read the entire page specially the last paragraph - "... Two-node clusters use cluster HA, in which neither node holds epsilon; instead, both nodes are continuously polled to ensure that if one node fails, the other has full read-write access to data, as well as access to logical interfaces and management functions." https://library.netapp.com/ecmdocs/ECMLP2862552/html/GUID-EFE1DEF4-8B87-4C4A-8E4E-C6C79F760710.html#:~:text=If%20the%20master%20node%20goes,fractional%20voting%20weight%20called%20epsilon%20.
B Epsilon and Quorum work "hand by hand" https://docs.netapp.com/us-en/active-iq-unified-manager/health-checker/concept_understand_quorum_and_epsilon.html
B is correct here is an up to date explanation from netapp #https://docs.netapp.com/us-en/ontap/system-admin/quorum-epsilon-concept.html
Epsilon its correct .