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400 high scalability-2008-10-01-The Pattern Bible for Distributed Computing


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Introduction: Software design patterns are an emerging tool for guiding and documenting system design. Patterns usually describe software abstractions used by advanced designers and programmers in their software. Patterns can provide guidance for designing highly scalable distributed systems. Let's see how! Patterns are in essence solutions to problems. Most of them are expressed in a format called Alexandrian form which draws on constructs used by Christopher Alexander. There are variants but most look like this: The pattern name The problem the pattern is trying to solve Context Solution Examples Design rationale: This tells where the pattern came from, why it works, and why experts use it Patterns rarely stand alone. Each pattern works on a context, and transforms the system in that context to produce a new system in a new context. New problems arise in the new system and context, and the next ‘‘layer’’ of patterns can be applied. A pattern language is a structured col


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1 Software design patterns are an emerging tool for guiding and documenting system design. [sent-1, score-0.778]

2 Patterns usually describe software abstractions used by advanced designers and programmers in their software. [sent-2, score-0.232]

3 Patterns can provide guidance for designing highly scalable distributed systems. [sent-3, score-0.345]

4 Patterns are in essence solutions to problems. [sent-5, score-0.078]

5 Most of them are expressed in a format called Alexandrian form which draws on constructs used by Christopher Alexander. [sent-6, score-0.28]

6 There are variants but most look like this: The pattern name The problem the pattern is trying to solve Context Solution Examples Design rationale: This tells where the pattern came from, why it works, and why experts use it Patterns rarely stand alone. [sent-7, score-1.526]

7 Each pattern works on a context, and transforms the system in that context to produce a new system in a new context. [sent-8, score-0.734]

8 New problems arise in the new system and context, and the next ‘‘layer’’ of patterns can be applied. [sent-9, score-0.6]

9 A pattern language is a structured collection of such patterns that build on each other to transform needs and constraints into an architecture. [sent-10, score-1.186]

10 The latest POSA book Pattern-Oriented Software Architecture Volume 4: A Pattern Language for Distributed Computing will guide the readers through the best practices and introduce them to key areas of building distributed software systems using patterns. [sent-11, score-0.496]

11 The book pulls together 114 patterns and shows how to use them in the context of distributed software architectures. [sent-12, score-1.1]

12 Although somewhat theoretical it is still a great resource for practicing distributed-systems architects. [sent-13, score-0.335]

13 It is as close as you're going to get to a one-stop "encyclopedia" of patterns relevant to distributed computing. [sent-14, score-0.692]

14 However it is not a true encyclopedia since "over 150" patterns are referenced but not described in POSA Volume 4. [sent-15, score-0.859]

15 The book does not go into the details of the pattern's implementations, so the reader should already be familiar with the patterns, or be prepared to spend some time researching. [sent-16, score-0.314]

16 Wikipedia has more details on Pattern languages to check out. [sent-18, score-0.072]


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