>At Alibaba, the system transfers 2 billion times and distributes 3.4PB of data every month, it has become one of the most important piece of infrastructure at Alibaba. The reliability is up to 99.9999%.
I took at look at their repo and it turns out there are surprisingly lots of good stuffs in it which never gets much spotlight or attentions.
If you have 5000 nodes running this, that could be as small as distributing 23.8 gigs/day to each node over the course of the month.
Also keep in mind this is a data distribution system. In the case of large data pushes, new builds, etc. it's important that all peers get the new data on a timely and reliable manner.
I suspect you're underestimating the problem this project solves by focusing on a mostly irrelevant data rate stat.
"up to"... Certainly looks like a wrong wording.
if I write a shell script with a scp line right now I can tell you it has 100% reliability. up to X% reliability means that "in the very nice and controlled environment, with the own devs attacking every production problem, trying to get 100% got us up to X%"