[CentOS] Large scale Postfix/Cyrus email system for 100,000+ users

Craig White craigwhite at azapple.com
Thu Oct 25 02:15:21 UTC 2007

On Thu, 2007-10-25 at 09:58 +0800, Christopher Chan wrote:
> Les Mikesell wrote:
> > Christopher Chan wrote:
> > 
> >>>>> I thought the usual ways of doing this were to either use a 
> >>>>> high-performance NFS server (netapp filer...) and maildir format so 
> >>>>> you can run imap from any client facing server, or to keep the 
> >>>>> delivery host information in an LDAP attribute that you find when 
> >>>>> validating the address.
> >>>>>
> >>>>
> >>>> This is the 'I have the money' way of doing this ;-)
> >>>
> >>> There are at least 2 free ldap servers.  Or if you are stuck with 
> >>> mysql you can probably add your own field for delivery host.
> >>
> >> The service provider I used to work for tried openldap in 98. They got 
> >> burned big time. Maybe it is up to the task today. What kind of 
> >> hardware, though, would you use for one that the OP indicates will get 
> >> a lot of writes? Everything I have read says LDAP is not for high 
> >> write problems.
> > 
> > 1998 was a long time ago.  Red Hat (fedora) directory server has claimed 
> >  good performce for several years now.
> > http://directory.fedoraproject.org/
> Yeah, well, I guess the Fedora Directory server is unlikely to drop its 
> entire datastore and will actually keep running but hey, are you going 
> to migrate back to ldap if you have a system that is distributed across 
> different mysql boxes running on cheap boxes and does its job?
what I can't figure out is why you are asking questions when you have
already decided answers...in part based on experiences from 10 years


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