Shop Direct, the owner of Littlewoods and Very, has improved site availability from an "abysmal" 57 percent to 99.99 percent after re-architecting its front-end ecommerce platform on Amazon Web Service’s public cloud.
In recent years, the retailer has undergone a transformation of its business, successfully shifting from catalogue sales to becoming a fully fledged digital retailer. This has placed more importance on its customer-facing systems and underlying infrastructure as it competes in a multi-billion pound retail market.
According to Shop Direct CIO Andy Wolfe, the migration of its main Oracle ATG ecommerce platform to Amazon Web Service's public cloud played a key role in improving customer experience across its retail websites, which had not always met expectations in the past.
“When approaching our sales peak in December 2012 we achieved about 57 percent [site] availability, which is absolutely abysmal for a digital retailer,” Wolfe said at a recent event. "Last year I am pleased to say we achieved 99.99 percent, right across every single one of our sites. In part that was down to a lot of the work we have done with AWS in re-architecting our front-end platform.”
Legacy architecture problems
The Oracle ATG ecommerce platform is a core part of Shop Direct’s retail operation, supporting around £1.7 billion transactions across the business each year.
The company had previously relied on an on-premise deployment of ATG, version 7, which was integrated into legacy back-end systems, creating problems with application performance.
When deciding to upgrade to the latest version of the software, Shop Direct chose to implement it in the cloud and is now running ATG version 10, using between 400 to 600 EC2 instances depending on peaks in demand.
“One of the biggest reasons for us deploying ATG in AWS was service reliability. We had a number of problems: we have a fairly eclectic architecture, as you can imagine for a retailer that spans 80 years. There are some interesting applications that I have to deal with on a daily basis,” said Wolfe.
“Our previous version of ATG was heavily entwined with a lot of that legacy architecture. As we approached peak trading periods, we found that problems in the back end were resulting in outages in the front-end. We had to do something about that - you can't be a world class retailer if your shop is shut.”
The migration had immediate benefits for the company, such as enabling a substantial increase in the amount of business it was able to transact.
“On Black Friday last year we did 10,000 orders per hour across one of our brands, Very. We have never previously done that order rate across all of our brands together, let alone one. That availability and increased promotional activity helped transform our business, and manifested itself in our bottom line, in terms of online sales growing by nearly 14 percent.”
Configuring application for the cloud
Migrating a major production application to the public cloud wasn't without its challenges, however.
Wolfe explained: “AWS is a fantastic platform, but when you couple that with an application that wasn't engineered for cloud you start to have some interesting challenges. It was really hard work. It took a lot of support from Oracle and from AWS to be able to configure ATG to scale for our business in the cloud.”
The company has a number of other systems in the cloud already. This ranges from Amazon S3 storage to Microsoft Office 365 and Sharepoint tools, as well as onsite search and navigation platform Endeca, and WebLogic middleware, which sits in the cloud to support back-end integration with the ecommerce platform.
However, the public cloud is not seen as a panacea, said Wolfe, and there are no plans for a wholesale move of its core applications in the near future. Decisions will be made on an application by application basis where there is a clear benefit, with customer-facing systems making the most sense for the business, he said.
“It is not a ‘cloud for clouds sake’ decision, everything else lends itself well to fixed infrastructure,” he told ComputerworldUK.
“We have over 80 applications which support our business, and some of those applications won’t suit being moved to the cloud.”
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