How Channel 4 handles the 'Davina effect' with cloud

Channel 4 has been one of the early adopters of cloud using Amazon to power its website and ensuring maximum reliability

It was almost inevitable that Channel 4 would be one of the pace-setters when it comes to cloud computing. The television channel earned its reputation for a host of innovative programmes, so the company's decision to become an early adopter of Amazon cloud services could be regarded as the perfect marriage.

And yet, the move to Amazon came about almost by accident and when the company did start to investigate what the US giant could offer it, there was even confusion as to what product would be taken up. In what sounds like a technological version of those footballing stories where a scout tries to sign a promising schoolboy and comes back with another player, the broadcaster first started investigating another product. “One of our guys went to a conference and learned about Amazon's S3 product,” says Bob Harris, Channel 4's CTO, “but when we looked into it, it was clear that it wasn't S3 that we wanted but EC2”.

Channel 4 was trying to streamline its web hosting. The company had a variety of sites, all supporting individual TV programmes but it wanted a more concerted approach and more scalablity.

A cloud-based approach was the obvious solution and the company decided to look around for a supplier. The clear market leader was Amazon but Channel 4 also decided to look at some alternative providers and concentrated on some UK ones, as that would simplify concerns about

physical location of data. The results were not satisfactory, “one provider actually asked us to “back-off” as they felt we might overwhelm their service,” says Harris.

The clear choice then was Amazon but it wasn't purely because it was the market leader and had the economic clout, according to Harris there were several other factors too. “Even back then AWS was already displaying the traits which are a must for a credible public Virtual Cloudsvider: self provisioning, pay as you go pricing, and elasticity. Since then, AWS has evolved adding new features and services, at both the IAAS and PAAS levels, which make it relatively straightforward to build complex platforms quickly and turn them off again when no longer required.”

By the nature of its business, Channel 4 expects a lot of peaks for its web; the website for a popular TV programme could possibly expect hundreds and thousands of visitors over a short period of time: the Amazon-supported sites have handled everything that has been thrown at it.

From small beginnings, Channel 4 has quickly moved towards cloud being the default platform for all websites with the organisation. Harris cannot say exactly how many are supported but he will say that there are more than 50 sites. Part of the appeal of cloud is the fluidity and the ability to put up (and take down) sites quickly and Channel 4 certainly makes the most of this. “Being a TV channel, we have the ability to drive huge peaks of traffic to sites when somebody on air says “go to now“; I call it the 'Davina factor'. The ability to scale those sites to meet those peaks is something I really wish I’d had back in the early 2000s when we started running Big Brother,” says Harris.

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