Re: [exim] spamassassin and clamAV server specs? (somewhat o…

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Autor: Chad Leigh
Data:  
A: Martin Hepworth
CC: exim-users
Assumpte: Re: [exim] spamassassin and clamAV server specs? (somewhat offtopic)

On May 19, 2005, at 2:05 AM, Martin Hepworth wrote:

> Chad Leigh -- Shire.Net LLC wrote:
>
>> I run exim and am using the localscan version of callout to spamc/  
>> spamd (been a while since I configured it) from Marc Merlin.  I  
>> do  not currently run any sort of AV.
>> I am thinking of adding in a spare single CPU opteron server that  
>> may  come available soon as a dedicated spamassassin and clamAV  
>> server to  handle the spam and AV tasks on a handoff from the main  
>> exim and imap  server.  This is not for a lot of mail accounts,  
>> yet, but rather for  testing of a new mail service to be launched  
>> later this year.
>> If I reconfigure this server at all before I start this   
>> experimentation, I want to make sure I address the pieces of the   
>> server most likely to be stressed by spamassassin and clamAV.    
>> Is  RAM, disk IO, or CPU the most important element of this sort  
>> of  processing?  Something tells me RAM is ,as spamassassin is  
>> perl  (don't know what ClamAV is written in), but that disk is  
>> also  important to be able to quickly read and write the temporary  
>> mail  files as they come in.
>> Any suggestions on what to emphasize on the server if I have a  
>> chance  to reconfigure (ie, add or adjust the HW) it first.
>> Thanks
>> Chad
>> ---
>> Chad Leigh -- Shire.Net LLC
>> Your Web App and Email hosting provider
>> chad@???

>>
>
> Depends on how many messages per day/hour and what size those
> messages are.
>
> For example I use MailScanner on FreeBSD 4.10 to glue exim,
> Spamassassin, ClamAv and Sophos together. I have lots of extra
> rules in my spamassassin, use bayes, a couple of RBL's all the URI-
> RBL's and even the 'experimental' black/greylist URI-RBLs.
>
> I have a single P4(ht)2.8ghz with 1.5GB DDR and a single SATA drive.
>
> It's not tuned, left the kernel more of less standard, but I use
> softupdates (a little like journaling) on the filesystems.
>
> It can handle about 3,600 messages per hour on an average size of
> 26kb. Now given my daily average if 2,450 messages per day it's
> well over spec. Oh and I reject unknown email addresses straight
> away which would increase the load by about 50%.
>
> Things to watch out for is disk i/o (esp syslog tuning this can
> help alot) on the temp areas too - a ram disk can help esp on
> Linux. RAM is also very important, the more the better. CPU helps
> but that's prob the last area you can change easily anyway.
>



Thanks, this confirms what I was thinking kind of. I am on FreeBSD 5
myself.

Chad

---
Chad Leigh -- Shire.Net LLC
Your Web App and Email hosting provider
chad@???