Must read articles on systems architecture

• Youtube architecture http://highscalability.com/youtube-architecture

• PlentyOfFish architecture http://highscalability.com/plentyoffish-architecture     

• Scaling Twitter http://highscalability.com/scaling-twitter-making-twitter-10000-percent-faster
      
• Amazon architecture http://highscalability.com/amazon-architecture
      
• Google architecture http://highscalability.com/google-architecture
      
• Database sharding http://highscalability.com/blog/2009/8/6/an-unorthodox-approach-to-database-design-the-coming-of-the.html
      
• StackOverflow architecture http://highscalability.com/blog/2009/8/5/stack-overflow-architecture.html
      
• Flickr architecture http://highscalability.com/flickr-architecture
      
• Facebook http://highscalability.com/blog/category/facebook

source: https://www.quora.com/What-are-the-good-resources-to-learn-about-distributed-scalable-robust-software-architecture-infrastructure-building