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Re: cdn.debian.net not working in Germany



>>>>> In <19538.55557.46736.318089@fisica.ufpr.br> 
>>>>>	Carlos Carvalho <carlos@fisica.ufpr.br> wrote:
>> ISHIKAWA Mutsumi (ishikawa@debian.org) wrote on 30 July 2010 15:48:
>>  >>>>>> In <19537.59866.871270.311169@fisica.ufpr.br> 
>>  >>>>>>	Carlos Carvalho <carlos@fisica.ufpr.br> wrote:
>>  >>> Another cdn problem: In
>>  >>> http://lists.debian.org/debian-devel/2008/02/msg00700.html Araki says
>>  >
>>  >>> This CDN checks your hosts DNS query to retrive your national location.
>>  >>> [removed]
>>  >>> - This CDN checks debian rsync mirror process. If mirror site is mirroring, CDN hides this site. 
>>  >
>>  >>> This is not appropriate. Debian mirrors are required to update in a
>>  >>> way that guarantees coherence between packages and indices.
>>  >
>>  > I think you misunderstand.
>>  >
>>  > Yes, coherence between packages and indices on single site is
>>  >guaranteed, but coherence the debian tree between a mirror site and
>>  >another mirror site is not guaranted.
>>
>> Yes but why is this relevant in this case? A client will only go to
>> one mirror.

  It is not true. You forget user need to run apt-get `update' and
  `upgrade (or install or so)'


 For example,

  Site A and Site B is CDN member, user query for cdn.debian.net
  will be returned both Site A and B's IP (the query answer includes
  two IN A entries)

  When Site A's debian tree is newer than Site B's debian tree,

   * It is OK, both apt-get update and upgrade (or install or so)
     access to same IP, e.g apt-get update fetch from Site A and
     apt-get upgrade fetch from Site A)

   * It is not OK, when apt-get update and upgrade
     access to deffernt IPs, e.g apt-get update fetch from Site A
     and apt-get upgrade fetch from Site B. In this example stuation,
     Site A's Packages file is newer than Site B, some packages
     will not be able to download from Site B.

-- 
ISHIKAWA Mutsumi
 <ishikawa@debian.org>, <ishikawa@hanzubon.jp>, <ishikawa@osdn.jp>


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