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split brain

Oracle RAC : understanding split brain

by admin

What is a “Split Brain” Split Brain is often used to describe the scenario when two or more nodes in a cluster, lose connectivity with one another but then continue to operate independently of each other, including acquiring logical or physical resources, under the incorrect assumption that the other process(es) are no longer operational or […]

Filed Under: oracle, RAC Tagged With: RAC, split brain

vcs basics – Communication faults, jeopardy, split brain, I/O fencing

by admin

Let us now see various communication faults that can occur in the VCS cluster and how VCS engine reacts to these fault. There are basically 2 types of communication failures 1. Single LLT link failure (jeopardy) When a node in the cluster has only the last LLT link intact, the node forms a regular membership […]

Filed Under: VCS Tagged With: communication faults, I/O fencing, jeopardy, split brain, vcs

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