1. http://www.top500.org/
2. Cisco Global Cloud Index: Forecast and Methodology, 2014-2019, whitepaper (2015), http://www.cisco.com/c/en/us/solutions/service-provider/global-cloud-index-gci/index.html
3. http://www.opencompute.org/
4. http://www.intel.com/content/www/us/en/architecture-and-technology/rack-scale-design-overview.html
5. Is there a need for on-chip photonic integration for large data warehouse switches;Ghuasi,2012