Hacker News Reader

gstaroon Streaming video has surpassed cable subscriptions worldwide

There are several reasons why Internet latency is inflated over direct-route speed-of-light latency. Some reasons may change others may not.

1) speed of light in fibre is 2/3c - unlikely to change soon 2) fibre is laid in the ground on a circuitous route - rarely changes but does happen 3) queueing delay - that's often the main culprit, changeable, but hard (see the buffer bloat debate)

gstaroon Memcached – Caching Beyond RAM: Riding the Cliff

The way I understand this proposal, the idea is to find at which request rate the latency of a storage configuration (eg, 2x Optane) explodes. If your request rate is above that rate, get more RAM. I'm not sure I understand how to figure out how much more RAM? Until the latency goes down I guess?

Also what about diurnal patterns? Can there be a way to dynamically react and save power..

Interesting reference to the morning paper. But don't get how that fits into the story?

https://blog.acolyer.org/2018/10/26/robinhood-tail-latency-a...

gstaroon How to implement a multi-CDN strategy

Thanks for clarifying!

gstaroon How to implement a multi-CDN strategy

Can't you do that with DNS records where there are multiple IPs on a A record?

Basically, we're already doing this for fault tolerance and load balancing within a single CDN. Except that currently we randomize the IPs. To enforce priorities, you'd want the IPs in the A record at least partially ordered by provider.

gstaroon Cache Modeling and Optimization Using Miniature Simulations [pdf]

Another pointer to a paper that seems related: https://www.usenix.org/conference/nsdi18/presentation/beckma...

This is a very hot topic recently. It seems to me that several communities (databases, CDNs, storage, CPU architecture, theory) do a lot of redundant work and don't communicate a lot with each other..

gstaroon RobinHood: dynamic reallocation from cache-rich to cache-poor

Partial discussion: https://news.ycombinator.com/item?id=18307077

gstaroon RobinHood: tail latency aware caching – dynamic reallocation from cache-rich

Partial discussion: https://news.ycombinator.com/item?id=18307077

gstaroon RobinHood: tail latency aware caching – dynamic reallocation

How widely has this been tested? Is this being used in production?

gstaroon Morocco abruptly drops clock change

Is there a service where you can pull constantly updated info about time zones etc? Like a library?

gstaroon Packets per Second Limitations in EC2

Thx for the clarification. Had the same misconception

gstaroon Packets per Second Limitations in EC2

Sounds like a marketing blurb but from just a few days ago:

"Azure is breaking the speed barrier in cloud connectivity. ExpressRoute Direct provides 100G connectivity for customers with extreme bandwidth needs. This is 10x faster than other clouds."

https://azure.microsoft.com/en-us/blog/azure-networking-fall...

Can sb confirm that? Have a useful case in mind.