Jul 30, 2022 · Operations

Analysis of Arbitration and Two‑Site‑Three‑Center (3DC) Solutions in Dual‑Active Data Center Disaster Recovery

This article examines key arbitration mechanisms and the two‑site‑three‑center (3DC) extension model for dual‑active data‑center disaster‑recovery, comparing implementations from Huawei, EMC, IBM, HDS and NetApp, and discusses design considerations, risks of brain‑split, and best‑practice deployment options.

3DCDual-Activearbitration

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Analysis of Arbitration and Two‑Site‑Three‑Center (3DC) Solutions in Dual‑Active Data Center Disaster Recovery

ITPUB

Nov 26, 2015 · Operations

How to Prevent Split‑Brain in HA Clusters: Arbitration, Fencing, and Practical Strategies

This article explains what split‑brain is in high‑availability systems, compares arbitration and fencing methods, evaluates client‑routing options without fencing devices, discusses data‑loss risks during failover for PostgreSQL and MySQL, and provides concrete implementation guidance using Pacemaker and Corosync.

PacemakerSplit-Brainarbitration

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How to Prevent Split‑Brain in HA Clusters: Arbitration, Fencing, and Practical Strategies