AWS re:Invent 2017: How Netflix Tunes Amazon EC2 Instances for Performance (CMP325)
Amazon Web ServicesCited 3× on HN, 2018-2022
18K views · 8 years ago · talk · dated
A Netflix performance engineer presents how Netflix tunes EC2 instances, covering instance type choice, Xen modes, SR-IOV and kernel tuning. The goal is near bare-metal performance in the cloud.
HN cites it as an example of workload-dependent performance tuning at scale and of Netflix's AWS practices.
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3 comments from Hacker News
it was actually 5x, my bad, but here's the references: Original info being mentioned as a rumour (2016): link Slides for confirmation by Greeg (2017): link Talk (2017): ▶ this video More discussion: link Original tweet has been deleted, but I have a screenshot here slide 9: link
Well, most distributions choose saner defaults. For instance, RHEL/CentOS/AmazonLinux use noop io-scheduler by default for SSD based machines. Though, I get your point: for instance, the TCP keep-alive defaults aren't suitable for all kinds of workloads: link I guess, that's why performance tuning is an art form as it is workload dependant: ▶ this video
They use a lot of AWS services - not just virtual machines - First they use Ubuntu Linux - SES (Email) - ElasticSearch (AWS has their own managed version) - SQS (queueing system) - S3 (storage) -auto scaling Most of the optimization's they do are standard things at scale where they are tuning by measuring performance. ▶ this video and the slide deck from the presentation. link But that's even more of a reason to choose AWS, Netflix has open sourced dozens of tools specifically related to AWS. You get to take advantage of their tools and knowledge.