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Re: postfix dimensioning

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  • mancyborg@gmail.com
    On Thu, 01 Nov 2012 10:22:13 +0100 ... Hi Ram and Robert thank you very much for your pointers, I ll ask on the dovecot mailing list and do some homework :)
    Message 1 of 4 , Nov 1, 2012
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      On Thu, 01 Nov 2012 10:22:13 +0100
      Robert Schetterer <rs@...> wrote:

      > Am 01.11.2012 09:14, schrieb Ram:
      > >
      > > On 11/01/2012 11:49 AM, mancyborg@... wrote:
      > >> Hi All, first post here, nice to meet you :)
      > >>
      > >> I've been using postfix and dovecot for years but always with few users.
      > >>
      > >> Now i must build a server for 1500 users,
      > >> they will use various email software (thunderbird, outlook, ..)
      > >> the webmail (i'm not sure if squirrelmail or roundcube)
      > >> and blackberry devices (with the BIS service).
      > >>
      > >> There will be around 1000 domains (virtual_domains) and postfix will
      > >> read its users and domains from mysql.
      > >>
      > >> I already have the hardware, it is a server with 4 physical cpu (Intel
      > >> Xeon E5504 @ 2.00GHz) and 24 gb of ram,
      > >> do you think it is enough ?
      > >>
      > > Usually postfix would not be the bottleneck for any mail server. You
      > > need to size for dovecot in your case.
      > > And sizing would be impossible unless you know how many mails / hr or
      > > concurrent imap / pop connections you are going to get.
      > > Please size your dovecot server accordingly. The disk i/o will also be
      > > very important when you size dovecot.
      > >
      > > Thank
      > > Ram
      > > PS: 1500 users with 1000 domains means hardly 2 users per domain ..
      > > Are these right numbers ?
      > >
      >
      > Hi, what you need is some idea of tec about backup, failure safety,
      > loadbalancing , cluster storage etc specially on the imap/pop side,
      > postfix side mostly is the more easy part in such setups
      > and not known for needing heavy hardware or producing bottlenecks
      > in short words, you have to think about the whole setup you wanna goal
      > first,
      > not special software like postfix, perhaps you should first look on
      > dovecot site and list for examples and hints
      >
      > Best Regards
      > MfG Robert Schetterer
      >
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      Hi Ram and Robert thank you very much for your pointers, I'll ask on the dovecot mailing list and do some homework :)

      > PS: 1500 users with 1000 domains means hardly 2 users per domain ..
      > Are these right numbers ?

      yes strange but true, almost each domain has just 1 user.

      Regards and have a nice day,
      Mike
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