[CentOS] Large scale Postfix/Cyrus email system for 100,000+ users
christopher at ias.com.hk
Thu Oct 25 02:30:36 UTC 2007
Craig White wrote:
> 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.
>> 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
Well, I do not work for that service provider anymore...I was just
putting forth the question they would probably ask...
In any case, the money for hardware stands I believe unless Fedora
Directory/OpenLDAP has really good performance in a heavy read/write
environment versus mysql.
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