utilizing more than one computer, connected to each other with a communication link to accomplish a common task.

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Fallacies: The network is reliable. Latency is zero. Bandwidth is infinite. The network is secure. Topology doesn't change. There is one administrator. Transport cost is zero. The network is homogeneous.

So what exactly is Brewer’s Theorem, and why does it warrant comparison with a 1976 punk gig in Manchester?

A wish to make systems more resilient was at the heart of the “Fallacies of Distributed Computing”, originally penned by L Peter Deutsch in 1994 when he was at Sun Microsystems, and augmented by a few others since then.

The purpose of a lock is to ensure that among several nodes that might try to do the same piece of work, only one actually does it (at least only one at a time). That work might be to write some data to a shared storage system, to perform some computation, to call some external API, or suchlike.

Huge volumes of data need near-supercomputer power to process and analyze it all. You can get there with the .NET Task Parallel Library.