slow distfiles mirror

Daniel J. Luke dluke at
Mon Aug 8 10:24:07 PDT 2016

On Aug 8, 2016, at 1:20 PM, Ryan Schmidt <ryandesign at> wrote:
> On Aug 8, 2016, at 10:25 AM, Daniel J. Luke wrote:
>> On Aug 7, 2016, at 5:22 PM, Ryan Schmidt wrote:
>>> It decides this based on lowest ping time. This is not necessarily 100% reliable: it's possible for a server to respond quickly to pings but slowly to actual file transfers.
>> If this is true for any of our mirror sites, they shouldn't be mirror sites.
>> Mirrors should have adequate bandwith to push data, so the determining factor in transfer speed is going to be the rtt (see also tcp bandwith-delay product).
> As I said in my next sentence:
>>> The UWaterloo server is often the one chosen for me, and it's been fast for me, but it depends on your unique network situation.

I'm interested in what unique network situation causes the rtt test to be an unreliable indicator of which mirror to choose.

Daniel J. Luke

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