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Avoiding Loadbalancers on Linux clusters

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When you think of implementing virtual servers, either because you need to cope with a higher load or to provide enhanced reliability, you face a new problem: how to avoid making the load balancers (or directors) the bottleneck and the single point of failure for the whole architecture. And there is an associated cost with traditional load balancing as you also need to add one (or better two for redundancy) more servers for the load balancer function itself.

The solution is simple: donít use load balancers at all.

Clusterip is a relatively new iptables extension written by Harald Welte, which allows the configuration of server farms (or clusters) without load balancers (or directors in Linux Virtual Server jargon). The iptables clusterip module is included with the latest 2.6 kernels so it will be present right out of the box in most modern Linux distributions.
 read more | mail this link | score:3902 | -Flavio Villanustre, June 13, 2005 (Updated: August 13, 2005)
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