On 2012-10-20 at 19:41 -0400, Jonathan Bayer wrote: > We are stuck with a really stupid load balancer right now (in process of > upgrading), which only has least-connection, round-robin or weighted > round-robin. Due to historical reasons, we are using the > least-connection method, which has no way to do any weighting.
Corollary: you're using a method which means that if one server can only handle less load than all the other servers, then as the load level ramps up past the limit of that one server, the loadbalancers will keep trying to send load to it, because it has the least number of connections, because you capped the number it would take but all the other servers will have a couple more than it, at any given time. Least-connection is only tenable when all servers can handle identical load. The moment one can handle less than the others, you've created a setup which will start trying to funnel requests to the most constrained server. Given your limited options, I suggest exploring weighted round-robin as an approach to keep you alive until you can replace the loadbalancers with something that understands "most available capacity" or better. -Phil _______________________________________________ Discuss mailing list [email protected] https://lists.lopsa.org/cgi-bin/mailman/listinfo/discuss This list provided by the League of Professional System Administrators http://lopsa.org/
