Posts from the ‘Red Hat’ Category


Demystifying High Availability Linux Clustering Technologies (Part 1)

Anyone trying to take the deep dive into Linux High Availability (HA) Clustering Technologies might find themselves quickly confused. There seems to be several different software pieces to the Linux clustering scene such as Heartbeat, Pacemaker, Corosync, OpenAIS, cman, rgmanager, and more. Furthermore, choosing which software to use and how to configure it often presumes that the cluster designer/administrator already knows what they need and what they don’t. What is needed for most people is both an overview of clustering technologies and perhaps a slight history lesson in how Linux HA Clustering Technologies have evolved.

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