SSD random-read Round-trip in same datacenter Physical disk seek Round-trip from US to EU 0 50,000,000 100,000,000 150,000,000 200,000,000 1 4 100 16,000 500,000 4,000,000 150,000,000 I/O Latency Time cost [ns]
http://www.slideshare.net/mongodb/everything-you-need-to-know-about-sharding System Capacity $ Scale-up Limits High Capacity/$ Scale-out to 100- 1000s of servers Optimize on Capacity/$ Scale-down and re- allocate resources Apps of the Past Modern Apps Trend
Josh C. Powell, “Single Page Web Applications: JavaScript end-to-end,” p.5 Data storage Data retrieval Business logic Authentication Authorization Validation Business logic HTML generation HTML rendering Decorative JS LAMP Data storage Data retrieval Authentication Authorization Validation HTML rendering Decorative JS Business Logic JS HTML generation MEAN Front-End Back-End Database