how many nessus clients to run parallel?

[chmod077 at gmx.de]

Hi all,
I am about to implement a distributed scan environment.
To ease the job of scanning for a wide range of subnets
I want do something like that:

 ping target
   if reachable, 
   do the "nessus-command for one ip-addr (in/outfile)>>writing 
   into a database".

The question now is:
Anybody out there, who has experience to say how many parallel nessus-jobs
to run max. is practicable? 

My experience is: to start more than about 100 jobs goes wrong.
(can't connect to localhost... - maybe the nessusd can't answer in this
situation ?).
A sleep 0.2 sec. between every nessus-job solved the problem temporarely.

Is there anybody who has experience with this?


Thanks.





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