Question regarding url_param hashing

Hi all,

I have a question regarding the balancing algorithm with "balance url_param site": ist the distribution of requests to the back-ends reproducible or random?

The urls will look like this:
http://hostname.com?site=www.someplace.com/bla/blubb.html <http://hostname.com/?site=www.someplace.com/bla/blubb.html>

Actual problem:
According to the site parameter in the request our back-end servers respond with a certain info regarding to the particular url given. For some reasons the back-end servers cannot hold all possible site urls responses and thus we want to distribute requests among the backends so that every site url is answered always by the same server (so with two back-end servers every server only needs to hold half of the responses). That's what the url_param does.

But what happens if we need two haproxy servers as front-end (too much requests per second for one machine)? will every haproxy instance deliver the same url to the same back-end server as the other haproxy machines? Granted that the haproxy's configurations are identical.

Or can I force the behaviour with some other means?

I know that the entire idea is far from ideal, but for the moment I have to find a quick solution (and then think about something elegant).

Thanks in advance for any help Received on 2010/04/08 21:14