The SPDY protocol was developed by Google to accelerate the web browsing experience. There are currently four drafts; the final one supported in NGINX labeled Draft 3.1. NGINX supported this draft as of version 1.5.10.
The protocol developers also had a hand in the ratification of HTTP/2. SPDY has since been deprecated; all support for it will end in 2016. It is superseded by HTTP version 2 (HTTP/2), which NGINX has supported since version 1.9.5.
Support for HTTP/2 can be activated by including the compile-time flag, --with-http_v2_module
. This will make the following directives available for configuration: