In 2012, BestBuy.com re-envisioned its high-scale, high-availability eCommerce platform. Instead of buying a vendor product and implementing a big-bang brand-new system, BestBuy.com took the more difficult but lower risk path of evolving out of their proprietary ATG commerce system. The architecture was built in 2012 and survived the holiday selling period with no issues. This presentation covers the cloud architecture of the largest electronics retailer on earth. This is your opportunity to see inside a true linear, elastically scaling architecture from one of the highest trafficked commerce sites in North America.
BestBuy.com needed an overhaul for many reasons; however, the overriding factors were scale and flexibility. The current vendor-supplied product was not architected to scale. At BestBuy.com's scale, each component of the eCommerce architecture must scale independently, but the available commerce systems are monolithic black boxes that can only scale horizontally. BestBuy.com also needed business flexibility—the ability to change the look and feel of its front-end website in hours or days rather than months or years. These two competing paradigms were combined to form a new, unique cloud architecture that achieves both high scale and massive flexibility.
The services architecture is designed for high scale and consists of multiple caching layers and Spring-based REST services. Since we are stringing together 30–50 services per front-end request in less than two seconds, the whole process is asynchronous and fault tolerant.
The data system feeding the service layer is also cloud based. A NoSQL system is used to store BestBuy.com's product catalog and serves that data as another set of REST services. This data system replicates across multiple cloud regions, multiple cloud vendors, and owned datacenters.
Finally, for personalization BestBuy.com uses a cloud-based user grid that serves up customer information from within the cloud. This is a second NoSQL system that allows individual personalization of every page on BestBuy.com.
To operate this cloud architecture and achieve high flexibility, the cloud infrastructure uses infrastructure automation. Using an Infrastructure as Code solution allows us to quickly update and change running cloud servers to new deployments. Furthermore, it allows us to run multiple concurrent versions of our cloud systems to determine which version has higher user engagement.
Overall, every part of the browsing experience on BestBuy.com is now served out of highly redundant and elastically scaling cloud architecture. This presentation will give you an in-depth look at the various aspects and considerations when scaling a massive ecommerce system.