Tag Archives: system architecture

Monitoring System Health and Availability, and Logging: Part 4

One more piece of context must be added to the discussion I’ve written up here, here, and here, and that is the place of these operations in the 7-layer OSI communications model. The image above is copied from and linked … Continue reading

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Monitoring System Health and Availability, and Logging: Part 3

Now that we’ve described how to sense error states and something about how to record logging information on systems running multiple processes, we’ll go into some deeper aspects of these activities. We’ll first discuss storing information so errors can be … Continue reading

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Monitoring System Health and Availability, and Logging: Part 2

Continuing yesterday’s discussion of monitoring and logging, I wanted to work through a few specific cases and try to illustrate how things can be sensed in an organized way, and especially how errors of various types can be detected. To … Continue reading

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Monitoring System Health and Availability, and Logging: Part 1

Ongoing Monitoring, or, What’s Happening Now? Any system with multiple processes or machines linked by communication channels must address real-time and communication issues. One of the important issues in managing such a system is monitoring it to ensure all of … Continue reading

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Designing and Documenting Inter-Process Communication Links

I’ve touched on the subject of inter-process communication previously here and here, but now that I’m charged with doing a lot of this formally I wanted to discuss the process in more detail. I’m sharing this in outline form to … Continue reading

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Of Pencils, the Division of Labor, Building Teams, and Knowing What the Heck Is Going On

The conversation at the watering hole after this evening’s CharmCityJS Meetup was interesting as usual. In between talking with and encouraging some of the younger attendees and speakers I spoke with a senior develop about a contract he was finishing … Continue reading

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Architectural Considerations for Simulation

The simulations I’ve written, designed, specified, and utilized have incorporated a number of different features. I found it interesting that I was able to describe them in opposing pairs. Continuous vs. Discrete-Event I’ve gone into detail about continuous and discrete-event … Continue reading

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Addendum To Process Described in Post on Domain-Driven Design

I’ve edited the post from May 11th that describes my preferred project/VV&A methodology. I was reminded, while viewing some excellent presentations at the Project Summit / Business Analyst World conference in DC this week (at which I volunteered) that I … Continue reading

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Domain-Driven Design

At yesterday’s DC PHP Developer’s Community Meetup Andrew Cassell gave a really nice presentation on Domain-Driven Design. He described the major books in the field, some of the main movers and history, and what the idea is all about. In … Continue reading

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A Simple Discrete-Event Simulation: Part 32

Before adding further complexity to the existing system (read: before adding the capabilities which will make it usable!) I wanted to back up and consider the internal architecture of what I’m building. The goal is something that conforms to the … Continue reading

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