Apache Module mod_lbmethod_bytraffic

Available Languages: en | + fr

+ + + + +

Description:	Weighted Traffic Counting load balancer scheduler algorithm for `mod_proxy_balancer`
Status:	Extension
Module Identifier:	lbmethod_bytraffic_module
Source File:	mod_lbmethod_bytraffic.c
Compatibility:	Split off from `mod_proxy_balancer` in 2.3

Summary

+ +

This module does not provide any configuration directives of its own. +It requires the services of mod_proxy_balancer, and +provides the bytraffic load balancing method.

Topics

Weighted Traffic Counting Algorithm

Directives

This module provides no + directives.

Bugfix checklist

Weighted Traffic Counting Algorithm

+ +

Enabled via lbmethod=bytraffic, the idea behind this + scheduler is very similar to the Request Counting method, with + the following changes:

+ +

lbfactor is how much traffic, in bytes, we want + this worker to handle. This is also a normalized value + representing their "share" of the amount of work to be done, + but instead of simply counting the number of requests, we take + into account the amount of traffic this worker has either seen + or produced.

+ +

If a balancer is configured as follows:

+ + + + + + + + + +

worker	a	b	c
lbfactor	1	2	1

+ +

Then we mean that we want b to process twice the + amount of bytes than a or c should. It does + not necessarily mean that b would handle twice as + many requests, but it would process twice the I/O. Thus, the + size of the request and response are applied to the weighting + and selection algorithm.

+ +

Note: input and output bytes are weighted the same.

+ +