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Netflix operates on FreeBSD servers equipped with AMD Epyc CPUs and achieves roughly 400 Gbit/s per server.
A demonstration of Netflix's video streaming technology was held during the EuroBSD conference. That in and of itself isn't significant, but the company's optimizations in order to achieve 400 Gbit/s per server are certainly noteworthy.
According to developer Drew Gallatin, the popular streaming service is powered by AMD Epyc-7502P servers with 32 cores and 256 GB DDR4-3200 RAM. Four 100GbE connections are provided by two Mellanox ConnectX-6 Dx switches. They are running FreeBSD. Because of the restricted amount of memory available, the developer has configured the systems to accommodate data rates of up to 400 Gbit/s.
Gallatin was able to accomplish this by utilizing a TLS offload to transfer data directly via the network infrastructure. This is enabled by the FreeBSD kernel, which reduces the load on the CPU. However, while the TLS session is still formed in userspace, the keys are transferred to the network hardware for encryption through the kernel. It is no longer necessary to make use of the processor.
TLS offloading on Intel hardware hasn't been tested yet, according to the team. Additionally, they already have hardware prototypes capable of 800 Gbit/s network connections, although none of these have been tested. Check out his presentation, which can be download here.
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Loobyluggs
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#5948271 Posted on: 09/21/2021 11:07 AM
Francesco
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#5948274 Posted on: 09/21/2021 11:20 AM
Someone would need to design and build hardware for such specific workloads... and that would mean selling it in very limited quantities… it would be very expensive, probably not less expensive than the current solution.
Always surprises me that they don't make specific content delivery systems for video, rather than rely on off-the-shelf parts. As they don't need general compute, but just video encode/decode and high raw bandwidth seems weird?
Someone would need to design and build hardware for such specific workloads... and that would mean selling it in very limited quantities… it would be very expensive, probably not less expensive than the current solution.
Stairmand
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Posts: 304
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#5948278 Posted on: 09/21/2021 11:35 AM
True, but it's a growing market, and it's not like a Epic CPU and 250GB RAM setup is a bargain!
True, but it's a growing market, and it's not like a Epic CPU and 250GB RAM setup is a bargain!
Kaarme
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#5948284 Posted on: 09/21/2021 11:59 AM
Nah, that's probably a bargain enough. Remember that it's for business. As long as your business generates revenue, which Netflix does, you can deduct investments from taxes. This is the huge difference between private consumers and business enterprises. Often businesses can't even afford to look for bargains because they need reliability. For example, a contract manufacturer in continental East Asia might make tools that would only last a month in serious use, but the factory itself requires quality tools to avoid production delays. The real question mark about the Netflix Epyc system would be the power use compared to specialised hardware.
True, but it's a growing market, and it's not like a Epic CPU and 250GB RAM setup is a bargain!
Nah, that's probably a bargain enough. Remember that it's for business. As long as your business generates revenue, which Netflix does, you can deduct investments from taxes. This is the huge difference between private consumers and business enterprises. Often businesses can't even afford to look for bargains because they need reliability. For example, a contract manufacturer in continental East Asia might make tools that would only last a month in serious use, but the factory itself requires quality tools to avoid production delays. The real question mark about the Netflix Epyc system would be the power use compared to specialised hardware.
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Always surprises me that they don't make specific content delivery systems for video, rather than rely on off-the-shelf parts. As they don't need general compute, but just video encode/decode and high raw bandwidth seems weird?