[lvs-users] High Traffic IMAP deployment

Timo Schoeler timo.schoeler at riscworks.net
Thu Aug 12 09:31:16 BST 2010


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thus David Lang spake:
> I missed the beginning of this thread
> On Thu, 12 Aug 2010, Timo Schoeler wrote:
> 
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>> thus Jose Ildefonso Camargo Tolosa spake:
>>> Hi!
>>>
>>> On Wed, Aug 11, 2010 at 3:56 AM, Faisal Ghulam <f.ghulam at nacspl.com> wrote:
>>>> I want to deploy LVS for highly traffic IMAP,POP3 .
>>>>
>>>> Can any one guide me how to get it with Centos 5.3.
>>>>
>>>> My backend Email server is Postfix.
>>> Postfix handles SMTP, not IMAP/POP3.  I use dovecot for IMAP/POP3, but
>>> I'm more interested on security than performance, so..... maybe
>>> someone else can suggest a faster IMAP server (although dovecot is not
>>> slow, I think, just for the record).
>> Dovecot is one of the best performing (if not *the* best performing)
>> pop/imap servers out there. Just use the search egine you like for
>> benchmark comparisons, and you'll get a bunch of results that will show
>> this, on different OSes (may it be GNU/Linux, xBSD, or whatever).
> 
> take a look at Cyrus, it is _very_ scalable, and includes replication and 
> clustering capabilities. It's routinely used by universities and other larger 
> organizations.

Cyrus is a nice player in the field (still run it myself on some hosts),
but it has some major drawbacks:

- - proprietary mail storage mechanism (compared to MailDir/mbox et al.)

- - slower than Dovecot, e.g.

- - compared to other pop/imap servers, it does not implement RFCs as good
as others (Dovecot is very good here, too)

> David Lang

HTH,

Timo

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