Re: Guix / Nix Benchmarks

[Ricardo Wurmus]

Wilko Meyer <w@wmeyer.eu> writes:

> Ricardo Wurmus <rekado@elephly.net> writes:
>> I’ve found download speeds to vary wildly dependent on where you are.
>> From an AWS EC2 instance in Frankfurt we get about 50MiB/s download
>> speeds from ci.guix.gnu.org, whereas some in France get sub 1MiB/s.
>
> So, this could be an ISP related issue, e.g. maybe an issue regarding
> peering capacities? As far as I know there have been historical issues
> in this direction between commerical ISPs (namely DTAG being the one I'm
> aware of) and educational networks such as X-WiN, so (without having any
> deeper knowledge on Guixes situation on this) this could apply here as
> well?
>
> As ci.guix.gnu.org is hosted at AS210482/the Max-Delbrueck-Centrum, I
> would guess that there could be something similar going on causing this,
> e.g. commerical ISP trying to enforce their double payed traffic
> strategies and the educational networks where ci.guix.gnu.org is hosted
> (rightfully) not participating in that/not having direct peering with
> these ISPs ASNs?

Yes, this is our guess.  The head node and ~24 nodes of the Berlin build
farm are hosted in the MDC data center, which is hooked up to the
internet via the DFN network IIUC.

-- 
Ricardo