F5 BIG-IP systems won hands down, according to Kelty. In 2007, Pandora considered several replacement ADC solutions and ran pilot testing on three. In 2012, Pandora decided its projected growth required another ADC upgrade, with even more massive scalability than it had needed in the past. The result was a transition to F5 BIG-IP systems in 2007, which lasted Pandora through five years of enormous growth. “We needed a solution capable of handling 100 application server nodes or more in a single pool without any performance bottlenecks.”įinally, Pandora was looking for a product that could manage SSL offload at a future date. “We needed a solution that would do what the vendor promised, with a solid code base that wouldn’t force us to devise all kinds of tweaks, scripts, and workarounds,” says Kelty. When the two failover ADC units proved incapable of handling Pandora’s traffic volume, leading to significant downtime, Pandora decided it was time for a change. “We needed 14 ADC units in one data center-including 2 for failover-just for audio delivery.” Pandora’s ADC solution also required its already overextended engineering team to create and implement manual tweaks and workarounds just to allow application server nodes to be taken down for servicing and updates. “Our ADC solution was just not living up to the vendor’s promises,” says Kelty. However, the solution wasn’t meeting Pandora’s scalability and performance needs. “We have to be sure we can always handle the next wave of users and user traffic six months down the road.”įive years ago, Pandora was using a different Application Delivery Controller (ADC) to distribute user application requests to a data center farm of music delivery servers. “Since we’re an Internet radio service, we want users to have the best possible listening experience with no delays or outages,” says James Kelty, Director of Network Engineering for Pandora. With listeners tuning in for more than a billion hours per month, Pandora must always be ready to handle massive amounts of traffic with top-level performance. Launched in 2005, Pandora is the leading Internet radio service, streaming personalized music and comedy to tens of millions of listeners worldwide based on each user’s individual preferences.
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