The team is now working on supporting up to 64 devices per rack and making the process of pushing new code to the devices more efficient.
The latest version of the mobile device rack the company is currently using in Prineville also features a camera to track what’s happening on the devices, though it seems the team hasn’t quite activated this feature yet.
The team also experimented with building a wall with 240 devices, but that took up too much space. The earliest versions of these racks were pretty basic and didn’t really work well (largely because they were made from metal and too much metal means the Wi-Fi signal simply didn’t work anymore). Early on, engineers would test apps on a single device, but given how many phones and tablets there are on the market today, that simply didn’t scale and a small team within Facebook’s Production Engineering organization set off to build these racks. While Facebook didn’t say all that much about how it pushes updates to the phones besides that it uses Chef, Reversat noted that the device lab grew out of the company’s work on CT-Scan, a performance-monitoring service the company first talked about last year. “For example, we wouldn’t be able to track down a 1 percent performance regression in a simulator,” Reversat says in today’s formal announcement.
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Facebook uses eight Mac Minis per rack for iOS testing (because each one can only talk to four iPhones) or four OCP Leopard servers for testing Android devices.īut why opt for on-device testing when there are plenty of simulators that would be much easier to handle? The Facebook teams argues that while simulators are good at figuring out why apps may not be working right, they aren’t great for performance testing. Because of this, there are PCs and Mac Mini’s under every rack.
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To ensure that tests are comparable, the phones all reboot after every test.Īll of the phones also need to be connected to a PC or Mac in order to receive the latest code. For Android, that’s all the latest versions from KitKat on, and for iOS, that’s iOS 7 to 9 (I assume the team is also testing iOS 10 already, as well). As Reversat noted, these devices also run a number of different versions of their respective operating systems. The available devices run from basic Android Galaxy phones to the latest iPhones. Each rack holds 32 phones, for a total of almost 2,000 devices, but, as Facebook’s Antoine Reversat told us, the plan is to bring this number to 64 devices per rack.Įach rack features its own Wi-Fi signal and is also an EMI enclosure to make sure that neighboring racks can’t pick up the Wi-Fi signals from its neighbors.Įvery time an engineer makes changes to one of Facebook’s main mobile apps, that new version of the app is automatically tested on these devices to ensure that there are no crashes or performance issues. The mobile device lab currently occupies 60 racks in the data center. In the process, the company also showed off its mobile device lab for testing on physical devices new iOS and Android versions of the Facebook app, Messenger and Instagram. If you and CROSS Imaging-Supplies are a match, do not hesitate to get in touch with us.Īt the moment we have no vacant positions.Earlier this week, Facebook gave a small group of reporters a tour of its Prineville, OR data center. Now – are you convinced? We are interested in hearing more about you and your personal ambitions, experiences, and aspirations. Ready to work in an organization where your ideas and initiative and flexibility will be valued?.Are you fluent in German, English and at least one additional foreign language?.Do you appreciate being part of a small and highly motivated team?.If so – here a quick check to see if you and CROSS Imaging-Supplies are matching: Our terms and conditions of employment are advanced and we take pride in a straight-forward culture where we focus on our customers and supporting them when it comes to compatible toner. Our success depends a great deal on finding the right people that are sharing our values and are dedicated to support our flexible and performance driven culture. We are exporting and cooperating with customers and suppliers in more then 40 countries and are offering interesting job opportunities in marketing & sales, product-managment, and purchasing mainly.
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