I am looking for a traffic generator for stresstesting load balancers. Has
anyone an idea if there is software or anything else? I'm particularly
interested in testtraffic for DOMAIN and WHOIS.
Thanks, Arnold
On Thu, May 10, 2001 at 12:49:06AM +0200, Arnold Nipper exclaimed:
I am looking for a traffic generator for stresstesting load balancers. Has
anyone an idea if there is software or anything else? I'm particularly
interested in testtraffic for DOMAIN and WHOIS.
we have always liked http_load - used it to test Alteon, Extreme and
ClickArray load balancing apparatus so far. While it's perhaps not the most
featureful or powerful tool available, it's small, simple and free as in
beer (GPL'd IIRC). Check http://freshmeat.net and search for http_load.
Several possibilities below:
http_load (http://www.acme.com/software/http_load) is a good tool,
although it takes some liberties that can in some cases make it
not-at-all representative of real-life performance. It's HTTPS
support is especially non-representative, because it does not
shortcut an ACK resend problem in the SSL protocol that almost all
web clients do shortcut, causing a .2 second delay in every transaction.
If you have enough clients (say 50), the delay per connection is
small enough to disregard.
For arbitrary protocols, we've found that Perl's Net::RawIP
(http://quake.skif.net/RawIP/) to be surprisingly efficient. You still
need lots of clients, but it's easy to code a distributed benchmarking
tool in Perl with it.
Get the source for a WHOIS and wrap a for loop around the send() call.
DNSflood.pl (http://packetstorm.securify.com/DoS/dnsflood.pl). Sends
requests with spoofed source addresses. BE CAREFUL!!! If you're not
on an isolated network, the responses to the spoofed requests can leak
out of your network, causing hate mail, bandwidth throttling, embarrassment,
and possibly camel toe!
The DoS section of PacketStorm (http://packetstorm.securify.com/DoS) can
be a great source of benchmarking tools!
Good luck.
JMH
Arnold Nipper wrote:
I am looking for a traffic generator for stresstesting load balancers. Has
anyone an idea if there is software or anything else? I'm particularly
interested in testtraffic for DOMAIN and WHOIS.Thanks, Arnold