Architecture 201
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Service Oriented Architectures
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Fault tolerance, fault protection, masking, dependability fundamentals
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Fail open, fail closed
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Perspective: node, network, cluster, application
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Caching Concerns
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Static assets
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Data
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Eviction and replacement policies and evaluation
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Approaches
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(TTL, purge-on-write, no-purge versioning, constantly churning cache versus
contained, working set sizing)

Crash only
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Synchronous vs. Asynchronous
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Business continuity vs. Disaster Recovery
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Designing for Scalability: Horizontal, Vertical
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Simplicity
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Performance
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Tiered architectures
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MTTR > MTBF
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http://www.kitchensoap.com/2010/11/07/mttr-mtbf-for-most-types-of-f/