http://nginx.org/en/docs/http/ngx_http_upstream_module.html#sticky http://nginx.org/en/docs/http/ngx_http_upstream_module.html#... - to make clients 'stick' to

http://nginx.org/en/docs/http/ngx_http_upstream_module.html#sticky http://nginx.org/en/docs/http/ngx_http_upstream_module.html#... - to make clients 'stick' to upstreams, if you're using nginx.