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Tim Wu wrote:
>
> I found another problem.
> I setup only 2 real servers before starting AB and
> add one while ab is sending. It don't dispatch connections to this
> new real server until I stop AB and wait for a moment.
>
> I am sure it's not a problem of LVS because LVS can
> dispatch connections from another client to new real server .
>
> Anyone know why? Thanks for help.
Any chance ab is using keep-alives, or are you setting them explicitly
(-k)?
This isn't the place, but I may have noticed some "accounting" oddities
with ab - with regards to concurrency * total requests, etc.
For instance: (Version 1.3c <$Revision: 1.38 $>)
/www/bin/ab http://localhost/ -n 2 -c 2 (2 requests)
/www/bin/ab http://localhost/ -n 2 -c 1 (2 requests)
/www/bin/ab http://localhost/ -n 2 -c 3 (3 requests)
/www/bin/ab http://localhost/ -n 1 -c 3 (3 requests)
and, -n 2 -c 5 .. reports:
Concurrency Level: 5
Time taken for tests: 0.030 seconds
Complete requests: 2
.. But actually hits the server with 5 requests.
I feel sorta bad, but I guess I'm suggesting you might look at 'ab'
first ..
-Jay
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