Re: Using a CDN or some other mirror?

[Giovanni Biscuolo]

Hi Chris,

thank you for your CDN testing environment!

Chris Marusich <address@hidden> writes:

[...]

> For experimentation, I've set up a CloudFront distribution at
> berlin-mirror.marusich.info that uses berlin.guixsd.org as its origin
> server.  Let's repeat these steps to measure the performance of the
> distribution from my machine's perspective (before I did this, I made
> sure the GET would result in a cache hit by downloading the substitute
> once before and verifying that the same remote IP address was used):

[...]

> It would be interesting to see what the performance is for others.

[...]

measures from my office network: Italy, 20Km north Milan, FTTC
(90Mbit/sec measured bandwidth)

measure from Berlin:

--8<---------------cut here---------------start------------->8---
url_effective: 
https://berlin.guixsd.org/nar/gzip/1bq783rbkzv9z9zdhivbvfzhsz2s5yac-linux-libre-4.19
  http_code: 200
  num_connects: 1
  num_redirects: 0
  remote_ip: 141.80.181.40
  remote_port: 443
  size_download: 69899433 B
  speed_download: 9051388,000 B/s
  time_appconnect: 0,229271 s
  time_connect: 0,110443 s
  time_namelookup: 0,061754 s
  time_pretransfer: 0,229328 s
  time_redirect: 0,000000 s
  time_starttransfer: 0,326907 s
  time_total: 7,722509 s
--8<---------------cut here---------------end--------------->8---

latency measured with mtr:

--8<---------------cut here---------------start------------->8---
HOST: roquette                  Loss%   Snt   Last   Avg  Best  Wrst StDev
  1.|-- 10.38.2.1                  0.0%    10    0.3   0.4   0.3   0.4   0.0

[...]

 18.|-- 141.80.181.40              0.0%    10  112.5  77.1  55.6 201.7  47.1
--8<---------------cut here---------------end--------------->8---


from your mirror (third download):

--8<---------------cut here---------------start------------->8---
url_effective: 
https://berlin-mirror.marusich.info/nar/gzip/1bq783rbkzv9z9zdhivbvfzhsz2s5yac-linux-libre-4.19
  http_code: 200
  num_connects: 1
  num_redirects: 0
  remote_ip: 54.230.102.61
  remote_port: 443
  size_download: 69899433 B
  speed_download: 9702091,000 B/s
  time_appconnect: 0,172660 s
  time_connect: 0,037833 s
  time_namelookup: 0,003772 s
  time_pretransfer: 0,173263 s
  time_redirect: 0,000000 s
  time_starttransfer: 0,212716 s
  time_total: 7,204574 s
--8<---------------cut here---------------end--------------->8---

latency measured with mtr:

--8<---------------cut here---------------start------------->8---
HOST: roquette                   Loss%   Snt   Last   Avg  Best  Wrst StDev
  1.|-- 10.38.2.1                   0.0%    10    0.4   0.4   0.4   0.4   0.0

[...]

 11.|-- ???                        100.0    10    0.0   0.0   0.0   0.0   0.0
 12.|-- ???                        100.0    10    0.0   0.0   0.0   0.0   0.0
 13.|-- ???                        100.0    10    0.0   0.0   0.0   0.0   0.0
 14.|-- ???                        100.0    10    0.0   0.0   0.0   0.0   0.0
 15.|-- 52.93.58.190                0.0%    10   36.1  34.6  32.9  37.1   1.2
 16.|-- ???                        100.0    10    0.0   0.0   0.0   0.0   0.0
--8<---------------cut here---------------end--------------->8---

100% loss?

from here it seems Berlin is as performant as CloudFront

HTH!
Gio

-- 
Giovanni Biscuolo

Xelera IT Infrastructures

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