zbobet2012

27 ms·

241.
by zbobet2012 10y ago
Go's epoll abstraction is baked into the runtime. They are called goroutines. Goroutines blocked of FD's automatically use epoll and schedule based on its results: https://github.com/golang/go/blob/m
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by zbobet2012 10y ago
We have a workaround in place for 26492 (a program that just queries all containers, and there VETH info and checks if they are in the bridge, force adding them if they are not) luckily so we don't have to build custom versions of Syst
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by zbobet2012 10y ago
To echo this we have run 10k+ containers in production for close to a year, and docker crashes all the time. Sometimes in ways undetectable by any reasonable health polling mechanism messing up Kube as well. Edit: Relevant details https:&#
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by zbobet2012 10y ago
Not all art tells a story, and not all video games need to either. l(a le af fa ll s) one l iness -ee cummings Art certainly, but no story told. Just an emotion, a brief moment of human connection and emotion evoked. Now play this game, it
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So We've Had a Few Problems with Docker in Production
15 points by zbobet2012 10y ago|3 comments
246.
by zbobet2012 10y ago
A trie is O(k), where k is the length of the key on inserts and deletes. Generally, any hashing algorithm is also O(k) with the additional overhead of the lookup in the table. This also ignores that most hashes have only amortized O(1) inse
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by zbobet2012 10y ago
Trie's are my favorite data structure. The implementation in the Linux kernel is a lock free RCU structure ( http://lxr.free-electrons.com/source/lib/radix-tree.c ). It is used for the page cache among other th
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by zbobet2012 10y ago
Well, no Twitch isn't the largest. NBC/Comcast moved several orders of magnitude more of live video for the last olympics, and those numbers went up substantially this year+. Live presents interesting challenges yes, but in some w
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by zbobet2012 10y ago
I believe _truly_ complex systems will mimic the organic ones which are so successful. They will be chaotic with systems that have an emergent property of order. These systems will _gain_ from chaotic input rather than fail. For More: http
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by zbobet2012 10y ago
IP to the edge (of a CMTS) and then it's flipped to QAM. https://en.wikipedia.org/wiki/Quadrature_amplitude_modulatio... https://en.wikipedia.org/wiki/Cable_modem_termination_system Also syst
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by zbobet2012 10y ago
Yep^^ In addition there is a major encoding downside to this. If your encoder can grab a whole 2-10s chunk of video it can produce a better quality stream. This is actually _super_ important for producing good video quality (especially on t
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by zbobet2012 10y ago
We (Comcast/NBC) run 2s segments for our video streaming service which is... substantially larger than this. High latency mobile networks on clients which don't do keep alive can be _somewhat_ problematic. The best fix for that is
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by zbobet2012 10y ago
How do you think digital cable television works today? It happens, just on closed private networks.
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by zbobet2012 10y ago
A 2Mbps profile (what they mentioned) is about 900Megabytes/hour. They use ABR (hls) so, most likely there _average_ bitrate is actually only 1.5Mbps. That means about 675 MB per hour. Which means about 600k hours where consumed by thi
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by zbobet2012 10y ago
Twitch and Netflix use https://en.wikipedia.org/wiki/Adaptive_bitrate_streaming . So does youtube. It's all the same tech.
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by zbobet2012 10y ago
2.0Mbps is an SD profile, which is worth mentioning.
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by zbobet2012 10y ago
TL;DR: The delay is normally a segment length. Somewhere between 2-16s depending on there configs. Because the system is realtime (live) it _must_ not fall behind live. These systems therefore are always only a single segment behind live.
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by zbobet2012 10y ago
Wow, tbh invest in our (or our allies) bonds is an interesting way to structure this for sure.
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by zbobet2012 10y ago
CGO_ENABLED=0 Otherwise it will dynamically link glibc in case of CGO code. Note: the race detector does not work without cgo enabled.
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by zbobet2012 10y ago
> It doesn't get any easier, you just get faster. - LeMonde Bicycle weight only helps if you don't push yourself already. Going fast is fun, so why not go light?
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by zbobet2012 10y ago
I have over 5k containers running on Kube in our own infrastructure...
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by zbobet2012 10y ago
Garbage collection is an idea. It can be slower, or faster, than other memory management techniques depending on implementation and specific usage. Functional programming languages do not _require_ a GC. They just largely have it. "Fib
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by zbobet2012 10y ago
Research on the subject says this is more dangerous for the cops then the calmer approaches. The irony is cops do this to protect themselves, and statistically speaking it has the exact opposite effect.
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by zbobet2012 10y ago
Everyone is trashing on this; and for the the most part I agree. However, there is a very large value in an English education for programmers. Learning to write well is learning to communicate effectively. And communication is a core goal o
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by zbobet2012 10y ago
The biggest reason is super simple. Emacs works in terminal mode (really well) and can be <insert pkg manager here> installed pretty much everywhere. If you are ever in a situation where you are working on a remote system over SSH (po