ngx_http_upstream_fair_module

This module is not distributed with the Nginx source. Installation instructions are below.

The upstream_fair module sends an incoming request to the least-busy backend server, rather than distributing requests round-robin.

Example

upstream backend {
    server server1;
    server server2;
    fair;
}

Directives

syntax fair

context upstream

Enables fairness.

syntax upstream_fair_shm_size size

default upstream_fair_shm_size 32k

context main

Size of the shared memory for storing information about the busy-ness of backends. Defaults to 8 pages (so 32k on most systems).

This module is not distributed with the Nginx source. You can browse its git repository, or download the tar ball.

After extracting, add the following option to your Nginx ./configure command:

    --add-module=path/to/upstream_fair/directory

Then "make" and "make install" as usual.