Re: my CDN measure_get

[Chris Marusich]

Hi Simon,

Thank you for sharing the data with us!  It seems that for you, in
Paris, CloudFront represents a very nice performance improvement.

zimoun <address@hidden> writes:

> laptop$ measure_get
> https://berlin.guixsd.org/nar/gzip/1bq783rbkzv9z9zdhivbvfzhsz2s5yac-linux-libre-4.19
> 2>/dev/null
> 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: 2088170.000 B/s
> time_appconnect: 0.123089 s
> time_connect: 0.042923 s
> time_namelookup: 0.004140 s
> time_pretransfer: 0.123141 s
> time_redirect: 0.000000 s
> time_starttransfer: 0.199722 s
> time_total: 33.474630 s

For this request, berlin.guixsd.org throughput is 17 Mbps, and latency
is 39 ms after DNS name resolution.

> laptop$ measure_get
> https://berlin-mirror.marusich.info/nar/gzip/1bq783rbkzv9z9zdhivbvfzhsz2s5yac-linux-libre-4.19
> 2>/dev/null
> 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: 143.204.229.90
> remote_port: 443
> size_download: 69899433 B
> speed_download: 10793612.000 B/s
> time_appconnect: 0.024161 s
> time_connect: 0.010927 s
> time_namelookup: 0.007414 s
> time_pretransfer: 0.024253 s
> time_redirect: 0.000000 s
> time_starttransfer: 0.029704 s
> time_total: 6.476473 s

For this request, berlin-mirror.marusich.info throughput is 86 Mbps, and
latency is 3.5 ms after DNS name resolution.  The throughput is about
400% greater than going directly to berlin.guixsd.org, and the latency
is about 91% less than going directly to berlin.guixsd.org.

> cluster$ measure_get
> https://berlin.guixsd.org/nar/gzip/1bq783rbkzv9z9zdhivbvfzhsz2s5yac-linux-libre-4.19
> 2>/dev/null
> url_effective: 
> https://berlin.guixsd.org/nar/gzip/1bq783rbkzv9z9zdhivbvfzhsz2s5yac-linux-libre-4.19
> http_code: 200
> num_connects: 1
> num_redirects: 0
> remote_ip:
> remote_port:
> size_download: 69899433 B
> speed_download: 2863050,000 B/s
> time_appconnect: 0,272 s
> time_connect: 0,041 s
> time_namelookup: 0,004 s
> time_pretransfer: 0,272 s
> time_redirect: 0,000 s
> time_starttransfer: 0,346 s
> time_total: 24,414 s

For this request, berlin.guixsd.org throughput is 23 Mbps, and latency
is 37 ms after DNS name resolution.  Compared to the previous direct
request to berlin.guixsd.org, the throughput is 35% greater, and the
latency is 5.1% less.

> cluster$ measure_get
> https://berlin-mirror.marusich.info/nar/gzip/1bq783rbkzv9z9zdhivbvfzhsz2s5yac-linux-libre-4.19
> 2>/dev/null
> 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:
> remote_port:
> size_download: 69899433 B
> speed_download: 43271174,000 B/s
> time_appconnect: 0,179 s
> time_connect: 0,006 s
> time_namelookup: 0,004 s
> time_pretransfer: 0,179 s
> time_redirect: 0,000 s
> time_starttransfer: 0,182 s
> time_total: 1,615 s

For this request, berlin-mirror.marusich.info throughput is 346 Mbps,
and latency is 2 ms after DNS name resolution.  Compared to the direct
request to berlin.guixsd.org, this request's throughput is 1400%
greater, and its latency is 95% lower.  I suppose your cluster must be
close to a CloudFront edge location.

So yes, I think this makes it quite clear that for you, CloudFront
represents a very nice performance improvement, both on your laptop and
especially in your cluster.

-- 
Chris

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