how to do a test with heavy load?

Marten Lehmann lehmann at cnm.de
Sun Sep 5 19:49:16 UTC 2004


Hello,

sometimes strange DNS-errors occur in my system of firewalled webservers 
and firewalled caching-nameservers. For example: A webserver needs to 
lookup a domain name for a mysql-server and gets a "host not found". 
Some minutes later, everything works fine again. Same for mailservers. 
Our caching nameservers are running with query-source * 53. Is it 
possible that this is a bottleneck? Could bind resolve queries more 
reliable if it can use random ports for every query? How can I run a 
test under heavy load to reporduce this behaviour?

Regards
Marten


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