High-Availability Clustering in the Open Source Ecosystem

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 AN!Wiki :: High-Availability Clustering in the Open Source Ecosystem

High-Availability Clustering in the Open Source Ecosystem

Two Histories, One Future

Prologue

Open-source high-availability clustering has a complex history that can cause confusion for new users. Many traces of this history are still found on the Internet, causing many new users to make false starts down deprecated paths in their early efforts to learn HA clustering.

The principle goal of this document is to provide clarity on the future of open source clustering. If it succeeds in this goal, future new users will be less likely to start down the wrong path.

In order to understand the future, we must start in the past. Documenting the past is always a tricky prospect and prone to error. Should you have insight that would help improve the completeness or accuracy of this document, please contact contact us at "docs@alteeve.ca". We will reply as quickly as possible and will improve this document with your help.

Two Types of Clusters; HA and HPC

There are two distinct types of "clusters"; High-Availability clustering and High-Performance Compute clusters. The former, HA clusters, are designed to ensure the availability of services in spite of otherwise-catastrophic failures. The later, HPC clusters, are designed to speed up the processing of problems beyond the abilities of any single server.

This document speaks specifically about the history and future of high-availability clusters.

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