Like most other RADIUS server load testers it merely tests how fast the
client load test can run and doesn't really test the server load.
The Evolynx tester is especially prone to this problem because you can't
set the client time out. And 20 concurrent threads won't result in
much of a load. And CPU load may not be much of a measure of a server's
capacity.
In a number of my own tests I've found that the shorter the time out the
faster the server appears to run with only slightly more packets being
dropped.
What we're seeing is that a long time out can make it appear that all
packets are being processed but the long time out also slows the client
load test. If half of those threads are waiting a very short time for
responses and half are waiting a long time (essentially waiting for the
short responses to be processed by the server) you're now down to half
the threads testing the server. As time goes by more and more threads
are waiting for fewer quick thread responses and the test becomes
meaningless.
Being able to set the time out to something like one tenth of a second
can show a significant increase in server packets processed with only a
slight increase in dropped packets for simple authentication methods. A
dramatic increase in packet loss usually shows a back end problem. The
only real way to load test a server is to run many tests from many machines.
For example, I saw the graph of over 100,000 customers using a RADIUS
accounting server. The dropped packet count was sloping up gradually as
the morning progressed and more people were using the system. Finally
the back end server completely bogged down and then the dropped packets
spiked enormously as customers started re-accounting causing a complete
failure of the system from which it wouldn't recover until most of the
customers gave up. That's the test you're looking for and that's the
load you want :)
Kostas Kalevras wrote:
O/H [EMAIL PROTECTED] έγραψε:
You do. ;-)
If you have freeradius you have radiusclient.
Ivan Kalik
Kalik Informatika ISP
Dana 4/10/2007, "Amr el-Saeed" <[EMAIL PROTECTED]> piše:
Dear All,
Does any one have any tool to stress test the freeRadius ??
http://www.evolynx.com/radius/dl_loadtest.aspx
regards,
Amr el-Saeed
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