Andrea,

this only belongs to the case, if any DNS config value is changed or the 
threads have to reread the config.
While normal work, only the MaintThread (10000) checks the DNS Servers 
every 60 seconds (if nothing other is to do).

But how ever, you are right, it does not make sense that all Workers are 
checking the DNS Servers in the above case. This will be change in the 
next release. Only the MainThread (0) and the MaintThread (10000) will 
check the DNS Servers.
An overload of the DNS Servers should never be reached, because in normal 
work it could be possible that all Workers are doing a DNS-query at the 
same moment.

Hi all,

if anyone uses V2, I recommend to install a local DNS-Server with 
'root-based' (no forwarding) DNS-resolving and a large record cache. If 
ASSP is running on a high load system (>=30.000 requests per day), the 
DNS-Server should not be installed on the same machine. Nearly all checks 
are DNS based (except bayes and some regex checks) - so it could be 
possible that one thread is doing 100 or even more DNS-querys for one 
mail.
For such systems the DNS-Server should be able to handle (and answer !!!) 
at least 50 querys per second.


Thomas





"GrayHat" <[email protected]> 
20.10.2009 09:27
Bitte antworten an
GrayHat <[email protected]>; Bitte antworten an
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Kopie

Thema
Re: [Assp-test] fixes and changes in 2.0.1_RC0.5.01






Just a minor "nit"; looking at the logs sounds like each thread
performs a DNS response time check; now, while it isn't really
a big issue, it doesn't make much sense to me; it would be a
better idea to let just a given thread perform DNS checks, not
that the DNS is "overloaded" (in general) but, again, it doesn't
seem to make much sense to check the DNS at the same time
from all the worker threads


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