"Over the past two decades, e-commerce applications have evolved from a single application supporting single channel to multiple ecosystems supporting multiple business channels. Now a day’s shopping begins with a virtual store browsing and concludes also at the webstore.
With increase in touch points, the traffic these systems needs to support has grown exponentially. Therefore, it is imperative that scalability be a key design principle for all e-commerce applications."
Know more: http://www.hcltech.com/white-papers/retail-consumer/building-scalable-e-commerce-system