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Raspbian リポジトリのミラーサーバー

Prologue

  • Raspbian には 2 つのリポジトリがある。

    1. ひとつは /etc/apt/sources.listこちら
    2. もうひとつは /etc/apt/sources.list.d/raspi.list
      こちらです。
  • apt upgrade で遅くて困るのは大抵 2. の方。

    • kernel や chromium-browser など、デカい package が多い。
    • 1. のように、勝手に近場のミラーを参照してくれない。※
      • ※近場のミラーが無いため?

TD;LR

  • /etc/apt/sources.list.d/raspi.list
    を以下のように修正しましょう。
    • :arrow_down: は stretch の場合です
-deb http://archive.raspberrypi.org/debian/ stretch main ui
+deb http://mirrors.ustc.edu.cn/archive.raspberrypi.org/debian/ stretch main ui

ミラーサーバーの比較検討

ご注意

  • 比較は ping の ack にかかる時間を見ているだけなので、
    実際のダウンロード速度とは必ずしも関係がありません。
    • 悪しからずご了承ください :bow:

1. archive.raspberrypi.org

  • official さんです。いつもお世話になっております。
$ nslookup archive.raspberrypi.org
Server:     2001:ce8:116:261f::1
Address:    2001:ce8:116:261f::1#53

Non-authoritative answer:
archive.raspberrypi.org canonical name = lb.raspberrypi.org.
Name:   lb.raspberrypi.org
Address: 93.93.130.214
Name:   lb.raspberrypi.org
Address: 93.93.130.39
Name:   lb.raspberrypi.org
Address: 46.235.231.111
Name:   lb.raspberrypi.org
Address: 93.93.135.188
Name:   lb.raspberrypi.org
Address: 93.93.128.133
Name:   lb.raspberrypi.org
Address: 93.93.130.104
Name:   lb.raspberrypi.org
Address: 93.93.128.211
Name:   lb.raspberrypi.org
Address: 93.93.128.230
Name:   lb.raspberrypi.org
Address: 46.235.227.11
  • さすがに一手に引き受けているだけあってロードバランスされてそう
$ ping -c 4 93.93.130.214
PING 93.93.130.214 (93.93.130.214): 56 data bytes
64 bytes from 93.93.130.214: icmp_seq=0 ttl=45 time=260.093 ms
64 bytes from 93.93.130.214: icmp_seq=1 ttl=45 time=260.088 ms
64 bytes from 93.93.130.214: icmp_seq=2 ttl=45 time=259.821 ms
64 bytes from 93.93.130.214: icmp_seq=3 ttl=45 time=266.456 ms

--- 93.93.130.214 ping statistics ---
4 packets transmitted, 4 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 259.821/261.615/266.456/2.797 ms
  • avg: 261.615 ms
$ ping -c 4 46.235.231.111
PING 46.235.231.111 (46.235.231.111): 56 data bytes
64 bytes from 46.235.231.111: icmp_seq=0 ttl=41 time=261.321 ms
64 bytes from 46.235.231.111: icmp_seq=1 ttl=41 time=265.325 ms
64 bytes from 46.235.231.111: icmp_seq=2 ttl=41 time=258.463 ms
64 bytes from 46.235.231.111: icmp_seq=3 ttl=41 time=262.659 ms

--- 46.235.231.111 ping statistics ---
4 packets transmitted, 4 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 258.463/261.942/265.325/2.472 ms
  • avg: 261.942 ms

2. mirrors.ustc.edu.cn

  • 見つけた中では最も近場の CN さん
$ nslookup mirrors.ustc.edu.cn
Server:     127.0.0.53
Address:    127.0.0.53#53

Non-authoritative answer:
Name:   mirrors.ustc.edu.cn
Address: 202.141.176.110
Name:   mirrors.ustc.edu.cn
Address: 218.104.71.170
$ ping -c 4 202.141.176.110
PING 202.141.176.110 (202.141.176.110): 56 data bytes
64 bytes from 202.141.176.110: icmp_seq=0 ttl=47 time=114.302 ms
64 bytes from 202.141.176.110: icmp_seq=1 ttl=47 time=117.460 ms
64 bytes from 202.141.176.110: icmp_seq=2 ttl=47 time=116.605 ms
64 bytes from 202.141.176.110: icmp_seq=3 ttl=47 time=114.785 ms

--- 202.141.176.110 ping statistics ---
4 packets transmitted, 4 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 114.302/115.788/117.460/1.292 ms
  • さすが、ご近所さんです!
$ ping -c 4 218.104.71.170
PING 218.104.71.170 (218.104.71.170): 56 data bytes
64 bytes from 218.104.71.170: icmp_seq=0 ttl=47 time=76.374 ms
64 bytes from 218.104.71.170: icmp_seq=1 ttl=47 time=73.496 ms
64 bytes from 218.104.71.170: icmp_seq=2 ttl=47 time=76.184 ms
64 bytes from 218.104.71.170: icmp_seq=3 ttl=47 time=76.207 ms

--- 218.104.71.170 ping statistics ---
4 packets transmitted, 4 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 73.496/75.565/76.374/1.197 ms
  • もう一方は更に :thumbsup:

3. mirror.ox.ac.uk

  • オックスフォード大学 さん (UK) です。
$ nslookup mirror.ox.ac.uk
Server:     2001:ce8:116:261f::1
Address:    2001:ce8:116:261f::1#53

Non-authoritative answer:
Name:   mirror.ox.ac.uk
Address: 163.1.160.163
Name:   mirror.ox.ac.uk
Address: 163.1.221.67
$ ping -c 4 163.1.160.163
PING 163.1.160.163 (163.1.160.163): 56 data bytes
64 bytes from 163.1.160.163: icmp_seq=0 ttl=40 time=307.555 ms
64 bytes from 163.1.160.163: icmp_seq=1 ttl=40 time=326.474 ms
64 bytes from 163.1.160.163: icmp_seq=2 ttl=40 time=248.140 ms
64 bytes from 163.1.160.163: icmp_seq=3 ttl=40 time=265.501 ms

--- 163.1.160.163 ping statistics ---
4 packets transmitted, 4 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 248.140/286.918/326.474/31.436 ms
$ ping -c 4 163.1.221.67
PING 163.1.221.67 (163.1.221.67): 56 data bytes
64 bytes from 163.1.221.67: icmp_seq=0 ttl=41 time=351.393 ms
64 bytes from 163.1.221.67: icmp_seq=1 ttl=41 time=269.717 ms
64 bytes from 163.1.221.67: icmp_seq=2 ttl=41 time=289.034 ms
64 bytes from 163.1.221.67: icmp_seq=3 ttl=41 time=251.012 ms

--- 163.1.221.67 ping statistics ---
4 packets transmitted, 4 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 251.012/290.289/351.393/37.753 ms
  • 結論:UK さんは遠い。

4. rpi.rutgers.edu

  • ラトガース大学さん (US) です
$ nslookup rpi.rutgers.edu
Server:     2001:ce8:116:261f::1
Address:    2001:ce8:116:261f::1#53

Non-authoritative answer:
rpi.rutgers.edu canonical name = debian-camden.camden.rutgers.edu.
Name:   debian-camden.camden.rutgers.edu
Address: 128.6.34.106
$ ping -c 4 128.6.34.106
PING 128.6.34.106 (128.6.34.106): 56 data bytes
64 bytes from 128.6.34.106: icmp_seq=0 ttl=47 time=174.724 ms
64 bytes from 128.6.34.106: icmp_seq=1 ttl=47 time=174.605 ms
64 bytes from 128.6.34.106: icmp_seq=2 ttl=47 time=174.347 ms
64 bytes from 128.6.34.106: icmp_seq=3 ttl=47 time=175.808 ms

--- 128.6.34.106 ping statistics ---
4 packets transmitted, 4 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 174.347/174.871/175.808/0.558 ms
  • CN さんとの物理的な距離には及びませんでしたか。

Epilogue

  • これだけでパッケージの fetch がかなりストレスフリーになります。

    • ustc.edu.cn さん多謝! :bow:
  • ただ fetch の速度が改善しても、結局インストールに時間がかかる :thinking:


EOF

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