nate wrote:

><quote who="Luc de Louw">
>
>
>
>>I tested amavis a few months ago. It eats up a lot of CPU, and
>>mailprocessing was very slow.
>>its good for a one-user-private-mail-server, but not for lots of users,
>>if there was no big change since then.
>>It uncompresses all attachements and checks the uncompressed stuff for
>>viruses.
>>
>>
>
>
>how fast was the system you ran it on? the mail system that recieves
>the most mail that I run gets an average of 227 messages/hour according
>to mrtg. system load is an average of 0.03, system is Dual P3-733, 256MB
>ECC ram, dual 10krpm drives in software raid1 for /var/spool (where all
>mail is processed & stored). Maximum 5-minute load average for this
>system over the past 5 weeks is 0.07. system runs amavis-perl-11
>with sophos, and sendmail (with dual queue setup). with this setup
>scanning a message takes about a second(recieve, scan, deliver)
>
>

Just to put my 2p in...

I run Postfix (snapshot-20021226) with amavisd and vscan. This is on a
matched pair of RS6000-H50's (4 way 332MHz CPU's, with 1.5 GB of RAM
each), with SSA disk (The old SSA40 stuff, not the newer & faster SSA160).

Over the two servers we do around 160,000-190,000 mails per day (By
pflogsum). And we peak at around 400-500 mails per minute. We usually
run at 100% CPU utilisation (Almost all of it from amavisd and uvscan),
but don't suffer from it, mails are delivered from internal to somewhere
like hotmail in around 10 seconds... The postfix servers are purley
gateways. No local mailboxes. SO this 10 seconds includes the time to
pass through the internal user mail servers, (2 hops through notes & a
notes->smtp conversion before it hits postfix)

YMMV.

[deleted]

>my personal server recieves probably 600 messages/day and theres
>no problems there either. P3-800 1.5GB ram (it does a lot of
>other stuff other then mail) 4x9GB drives in raid5(software)
>
>

600 message / day? On a P3-800? My PDA could handle > 600 messages per
day... I don't see that you'd have performance problems with that setup
on such a light load.

>no matter what you run though, if your server processes a lot of
>large attachments you will want a much faster system. I restrict
>all mails to 10MB(without encoding it drops to about 6.7MB). my
>main company mail hub averages 1.5MBytes/hour (in and out combined)
>of mail over the past 5 weeks, so with my probably-wrong-math
>it comes out to about 6.7kbytes per message.
>
>i suppose if you receieve tens of thousands of messages per day
>amavis may not scale well :) i haven't had any issues with my
>loads though.
>
>

It scales fine (Here). Don't be scared of high CPU. We don't suffer from
excessive disk IO either, although we're not running el-cheapo IDE or
even SCSI (OK. I know SSA is really just SCSI-III with a serial physical
layer alright? Same as FC...). IN fact we don't even see the IO wait on
our systems (Mainly because we're cpu saturated anyway).

-- 
I don't suffer from Insanity... 	| Linux User #16396
	I enjoy every minute of it...	|
					|
http://www.travellingkiwi.com/		|
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