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Uptime and the Value of Clustering for Linux Servers
Modern server-class computer systems have an increasing number of hardware error detection and correction capabilities built-in to them, and there are many options for increasing fault tolerance from RAID and multipath storage area networks to bonded ethernet interfaces and more. Even with all these high-availability features though, failure is a fact of life in modern data center environments.
Imagine a data center where a server going down causes no noticeable interruption to end-user services, where mission critical applications seamless fail-over from faulty nodes to any number of remaining nodes. Now imagine this in your data center, with your already deployed Linux servers, on your existing commodity x86 hardware. This is the promise of clustering.
This white paper explores the need for uptime, explains the three components that contribute to uptime, reviews some of the problems with existing enterprise server management, provides a clear definition of clustering, and finally gives an honest explanation of what it can and can’t offer your organization.