We're starting down the path of using HAProxy (among other things such as Crossroads, or LVS-NAT/LVS-DR) and putting them in front of our LDAP/S servers. We're starting w/HAProxy cause it was so easy to set up :) It obviously works out-of-the-box, so to speak. But I was wondering if anyone had any recommendations for tuning parameters (be it HAProxy or /etc/sysctl.conf, or anything else, at least software wise.) The LBs are a pair of old Sun X2100's running Centos 5.4, pretty generic stock.
As best as I understand our current setup, there are tons of tiny connections from our SMTP server pool to our LDAP server pool. Our existing load-balancer isn't cutting it anymore (at least we think that's the case.) As a trial, we want to simply replace our existing LB with a HAProxy based LB for starters, just to see if the problem we're having remains. If it all goes away, then we know the problems we're having are indeed because of our existing LB. If the problems remain, then maybe it's not the LB after all, and we need to dig more. I realize it's a bit tough to make recommendations, and there are many different ways to do this. But as far as haproxy.cfg or sysctl.conf or other more "common" locations, if anyone has a suggestions on configurations geared to process tons of tiny short connections, that'd be great. Low latency, small packets, short lived connections, many connections at one time. Thank you, Paul
