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thus Jose Ildefonso Camargo Tolosa spake:
> Hi!
>
> On Wed, Aug 11, 2010 at 3:56 AM, Faisal Ghulam <f.ghulam@xxxxxxxxxx> 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).
> Also, the format of the
> Mailboxes *is* important, and, off course, you need some kind of
> *shared* storage, or storage replication (not sure here), and either
> of these have to be fast.
Keep in mind that there may be some ceveats, depending on your solution.
If you're running bleeding edge stuff, a look at ceph [0] may be
interesting. OTOH...
>> Traffic through put is 500 MB per Second.
>
> 500Mbytes (ie, ~5Gbps) or 500Mbits (500Mbps). Also, is the traffic an
> addition of SMTP + IMAP/POP3 traffic, or just IMAP/POP3 traffic.
...this has to be fed to the mail daemons off the hard discs. So you
surely have some kind of heavyweight RAID subsystem or something like a
big EMC/IBM/whatever storage device?
>> Any one who has deployed it can share his experience.
Also, what about authentication? If you're going to authenticate all
this accesses against one (or or cluster of two) machines there might be
the next bottleneck you might hit...
>> Regards,
>> Faisal Ghulam
HTH,
Timo
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