The http module allows to expose elasticsearch API over HTTP.

The http mechanism is completely asynchronous in nature, meaning that there is no blocking thread waiting for a response. The benefit of using asynchronous communication for HTTP is solving the C10k problem.

When possible, consider using HTTP keep alive when connecting for better performance and try to get your favorite client not to do HTTP chunking.


The following are the settings the can be configured for HTTP:

Setting Description
http.port A bind port range. Defaults to 9200-9300.
http.max_content_length The max content of an HTTP request. Defaults to 100mb
http.compression Support for compression when possible (with Accept-Encoding). Defaults to false.
http.compression_level Defines the compression level to use. Defaults to 6.

It also shares the uses the common network settings.

Disable HTTP

The http module can be completely disabled and not started by setting http.enabled to false. This make sense when creating non data nodes which accept HTTP requests, and communicate with data nodes using the internal transport.