[LibreQoS] monitoring twitter rtt looks useful

[Dave Taht]

My specific point from TFA was that they had 100 anycasted IPs all over the
world,

the distance to their dns server shouldn't matter. remarkably *all* of my
tcpdump  traffic for the last 60 seconds was ipv6, the only ipv4s I can see
were 104.244.42.193 104.244.42.2
which are twitters. (really shocking they have no ipv6)

https://bgp.he.net/AS13414#_prefixes

really awful ping times over verizon 5g

root at balthazar:/home/d# ping 104.244.42.2
PING 104.244.42.2 (104.244.42.2) 56(84) bytes of data.
64 bytes from 104.244.42.2: icmp_seq=1 ttl=52 time=268 ms
64 bytes from 104.244.42.2: icmp_seq=2 ttl=52 time=89.5 ms
64 bytes from 104.244.42.2: icmp_seq=3 ttl=52 time=111 ms
64 bytes from 104.244.42.2: icmp_seq=4 ttl=52 time=134 ms
64 bytes from 104.244.42.2: icmp_seq=5 ttl=52 time=158 ms
64 bytes from 104.244.42.2: icmp_seq=6 ttl=52 time=59.6 ms


On Sun, Nov 13, 2022 at 2:50 PM dan <dandenson at gmail.com> wrote:

> It's pretty interesting and though they were 'surprised' at the results,
> as someone who lives 'a lot' of hops from major datacenters this makes
> perfect sense lol.
> Here's a local Spectrum circuit to twitter:
> [image: Screenshot 2022-11-13 at 3.45.00 PM.png]
> and here's off one of my Lumen fiber circuits:
> [image: Screenshot 2022-11-13 at 3.45.19 PM.png]
>
> 41ms is 'fine'... except this is about the best it gets here to a major
> service that lives in tons of datacenters off a DIA 10G fiber circuit.
> 104.244.42.65/.1 are the two DNS records I get for twitter and have the
> same numbers between them.
>
> Also, not to 'brag' here but I'm rocking that solid 41ms and the furthest
> edges of my network are 15ms out so my wISP service spanks Spectrum in
> latency every time.  Also note that the 41ms is through a cake shaper at a
> site that is passing about 1600x200Mbps right now.
>
>
> On Sun, Nov 13, 2022 at 2:43 PM Dave Taht via LibreQoS <
> libreqos at lists.bufferbloat.net> wrote:
>
>> If we only knew which 100 ips it was.
>>
>>
>> https://blog.twitter.com/engineering/en_us/topics/infrastructure/2019/expand-the-edge
>>
>> --
>> This song goes out to all the folk that thought Stadia would work:
>>
>> https://www.linkedin.com/posts/dtaht_the-mushroom-song-activity-6981366665607352320-FXtz
>> Dave Täht CEO, TekLibre, LLC
>> _______________________________________________
>> LibreQoS mailing list
>> LibreQoS at lists.bufferbloat.net
>> https://lists.bufferbloat.net/listinfo/libreqos
>>
>

-- 
This song goes out to all the folk that thought Stadia would work:
https://www.linkedin.com/posts/dtaht_the-mushroom-song-activity-6981366665607352320-FXtz
Dave Täht CEO, TekLibre, LLC
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