November 2017
Intermediate to advanced
494 pages
14h 29m
English
Content preview from Mastering Proxmox - Third Edition
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At least three nodes
HA must be configured in a cluster with a minimum of three nodes because with three nodes or more, achieving a quorum is possible. Quorum is the minimum number of votes required for Proxmox cluster operation. This minimum number is the total vote by a majority of the nodes. For example, in a cluster of three Proxmox nodes, a minimum vote of two Proxmox nodes is required to form a quorum. In a cluster with eight nodes, a minimum vote of five Proxmox nodes is required to form a quorum. With just two nodes, the ratio of votes will always be 1:1, so no quorum is possible.
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