Stratus Redundant Linux provides High Availability (HA) operation for VMs. HA operation achieves its level of redundancy by using a pair of physical machines (PMs). See High Availability Operation.
Stratus recommends configuring quorum service for HA operation. The quorum service prevents a condition called split-brain where both PMs of an HA operation pair are running independently of each other; for information, see Quorum Servers.
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