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Ahead of the Pack: the Pacemaker High-Availability Stack

Jun 19, 2012, 17:00 (0 Talkback[s])

Hardware and software are error-prone. Eventually, a hardware issue or software bug will affect any application. And yet, we're increasingly expecting services—the applications that run on top of our infrastructure—to be up 24/7 by default. And if we're not expecting that, our bosses and our customers are. What makes this possible is a high-availability stack: it automatically recovers applications and services in the face of software and hardware issues, and it ensures service availability and uptime. The definitive open-source high-availability stack for the Linux platform builds upon the Pacemaker cluster resource manager. And to ensure maximum service availability, that stack consists of four layers: storage, cluster communications, resource management and applications.

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