Apache Module mod_lbmethod_bytraffic

Summary

This module does not provide any configuration directives of its own.It requires the services ofmod_proxy_balancer, andprovides thebytraffic load balancing method.

Topics

• Weighted Traffic Counting Algorithm

Directives

This module provides no directives.

Bugfix checklist

• httpd changelog
• Known issues
• Report a bug

See also

• mod_proxy
• mod_proxy_balancer
• Comments

Weighted Traffic Counting Algorithm

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

lbfactor ishow 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:

Then we mean that we wantb to process twice the amount of bytes thana orc should. It does not necessarily mean thatb 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.