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We are
getting a new server this week or next week. I could do a configuration with HT
on ad with HT off and if we could find some user to load the server after our
business hours we could do come real testing on a server not setup for
production.
It is
going to be a dual zeon 3.0 with 1 gig of ram. We will have 6 drives 3 mirrors,
system, spool and log, mailboxes.
Anyone
willing to help load the server after our business hours?
Matt
what configuration would you like to see?? We only run declude with iamil and
our virus scanning is done on our gateways.
Kevin
Bilbee
Kevin,
That's a good question and
one that I was wondering about myself. Sniffer isn't hyperthreaded, but
by it's nature, that has no ill effects on the application, although it would
perform better with it off. It is just simply lean enough that it
shouldn't be maxing out a processor before the bulk of Declude and IMail
does. Maybe with persistent Sniffer it would make some sense to make it
multi-processor capable, but on the flipside, the leanness of the application
might add more overhead than benefit when made multi-processor aware (I have
no idea where the point is that a benefit would be found). On a dual 3
GHz hyperthreaded system, Sniffer's single thread is undetectable, and on a
dual 1 GHz system run to capacity, it was barely noticeable when using the
persistent mode.
With Declude there is more opportunity for refinement
due to the overhead in some configurations (especially custom filters).
Declude is multi-processor capable and it can use a lot of processor over
periods of several seconds as it goes from virus scanning to spam blocking to
message handling. The big determining factor probably has more to do
with how many processes might be running at one time. On my system we
typically have 5-10 processes running simultaneously during peak hours, and
I'm thinking that the number of processes should play into the
determination. Much of the CPU overhead comes with the virus scanning,
especially if you are running two scanners, and it appears that this stuff is
also multi-processor capable. So it seems like the norm for this stuff,
but I am not sure if it would be better or worse with it off.
I just
wanted to add some thoughts of mine that would play into the logic for someone
with the experience that would know. I could probably do a stress test
at some point to get a better idea, but that would be a big production
considering the distance to my server and the hours that I would need to do
this at. Maybe we have some other volunteers :) I'm thinking that
a 5,000 message load with a scannable attachment dropped into a MS SMTP
instance to relay off of IMail/Declude tried both ways ought to show the
difference.
Matt
Kevin Bilbee wrote:
Speaking of hyperthreading has anyone checked the performance of
Imail/declude with hyperthreading turned on and off. I know some apps have
showed better perforamnce with hyperthreading turned off.
Kevin Bilbee
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Sanford Whiteman
Sent: Saturday, October 09, 2004 3:22 PM
To: Keith Johnson
Subject: Re[4]: [Declude.JunkMail] Filter file maintenance suggestion
What type of CPU overhead do you experience with running SA/SPAMD
with Declude? I saw the tech doc and it mentioned that it takes up
20MB of memory for each config file load in serial.
Memory, shmemory. Pretty cheap stuff. :)
Are you aware of anyone running this on machines pulling over 200K
emails each day?
Yes, but not on _mailbox servers_. These are dedicated relay/scanning
boxes, purpose built with RAID 0+1 and two (four w/hyperthreading)
CPUs. You have to know what you're building for.
--Sandy
------------------------------------
Sanford Whiteman, Chief Technologist
Broadleaf Systems, a division of
Cypress Integrated Systems, Inc.
e-mail: [EMAIL PROTECTED]
SpamAssassin plugs into Declude!
http://www.mailmage.com/products/software/freeutils/SPAMC32/download/release
/
Defuse Dictionary Attacks: Turn Exchange or IMail mailboxes into IMail
Aliases!
http://www.mailmage.com/products/software/freeutils/exchange2aliases/downl
oad/release/
http://www.mailmage.com/products/software/freeutils/ldap2aliases/download/
release/
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=====================================================
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http://www.mailpure.com/software/
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