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System Architecture (and it’s subfield Software Architecture) is a discipline which is surprisingly poorly covered. In a sense, it is still more an art than a science, and usually requires somebody intimately familiar with practical systems, to tell what’s to do and what’s to avoid when building a system.

IT Hares have lots of experience in both Software Architecture and more general System Architecture, and are trying to share their knowledge (and more importantly, their feelings) about them.

All Not so Common Wisdoms about System Architecture, page 6:

MMOG Server-Side. Eternal Linux-vs-Windows Debate

posted by

Quote: “Each server is only as secure as its admin”
Another Quote: “For cheaper servers, the difference between Windows and Linux can eat as much as 50% of the server rental price (though for those servers which are more or less optimal price-performance-wise observed difference was closer to 20-30%).”
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Server-Side Architecture. Front-End Servers and Client-Side Random Load Balancing

posted by

Quote: “[about Round-Robin DNS] one of these returned IPs can get cached by a Big Fat DNS server, and then get distributed to many thousands of clients”
Another Quote: “As a rule of thumb, Front-End Servers are a Good Thing™”
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Server-Side MMO Architecture. Naïve, Web-Based, and Classical Deployment Architectures

posted by

Quote: “If you disrupt the game-event-currently-in-progress for more than 0.5-2 minutes, for almost-any synchronous multi-player game you won’t be able to get the same players back, and will need to rollback the game event anyway.”
Another Quote: “However, keep in mind, that all fall-tolerant solutions are complicated, costly, and for the games realm I generally consider them as an over-engineering (even by my standards).”
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Client-Side. Client Architecture Diagram, Threads, and Game Loop

posted by

Quote: “To have a good concurrency model, it is not strictly necessary to program in Erlang”
Another Quote: “Most of developers agree that FSM-based programming is beneficial in the medium- to long-run.”
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Client-Side. On Debugging Distributed Systems, Deterministic Logic, and Finite State Machines

posted by

Quote: “After your logic has failed in production, you can “replay” this inputs-log on your functionally identical in-house system, and the bug will be reproduced at the very same point where it has originally happened.”
Another Quote: “You can implement your Finite State Machine as a deterministic variation of a usual event-driven program”
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MOG GDD (a.k.a. Business Requirements)

posted by

Quote: “You don’t “make” a violin. It is barrels and benches which are “made”. And violins, just like bread, grapes, and children – are born and raised.”
Another Quote: “The very first step should be to understand what exactly you’re going to achieve.”
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