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Monday, July 12, 2021

Problems with Distributed Computing

Via O'Reilly.  Reading these through, based on how they are stated, would state them more as cautions than always being wrong.  It all depends upon the contextual needs involved and internal and external threats posed.    Still a good read to review component aspects of the distribution involved.   Much more discussion about each component is at the link.

Navigating the 8 fallacies of distributed computing 

By: Alex Diaconu     From Ably.com

The fallacies of distributed computing are a list of 8 statements describing false assumptions that architects and developers involved with distributed systems might make (but should undoubtedly steer away from). In this blog post, we’ll look at what these fallacies are, how they came to be, and how to navigate them in order to engineer dependable distributed systems.

What are the fallacies of distributed computing?

Building distributed systems you know you can rely on is no easy feat. Even a "simple" system that only consists of a couple of nodes still comes with complexity. Those nodes have to communicate over a network. However, one of them can fail, or the network itself can become unavailable, or experience high latency.

When designing our distributed system, it's essential to bear in mind that we can't assume everything will always go according to plan. We must be aware that there are constraints and obstacles we will need to overcome.

To better understand the challenges that come with engineering dependable distributed systems, we must refer to the fallacies of distributed computing — a list of false assumptions architects and developers might make. Here they are:

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. ... '

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