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+[[modules-memcached]]
+== memcached
+
+The memcached module allows to expose *elasticsearch*
+APIs over the memcached protocol (as closely
+as possible).
+
+It is provided as a plugin called `transport-memcached` and installing
+is explained
+https://github.com/elasticsearch/elasticsearch-transport-memcached[here]
+. Another option is to download the memcached plugin and placing it
+under the `plugins` directory.
+
+The memcached protocol supports both the binary and the text protocol,
+automatically detecting the correct one to use.
+
+[float]
+=== Mapping REST to Memcached Protocol
+
+Memcached commands are mapped to REST and handled by the same generic
+REST layer in elasticsearch. Here is a list of the memcached commands
+supported:
+
+[float]
+==== GET
+
+The memcached `GET` command maps to a REST `GET`. The key used is the
+URI (with parameters). The main downside is the fact that the memcached
+`GET` does not allow body in the request (and `SET` does not allow to
+return a result...). For this reason, most REST APIs (like search) allow
+to accept the "source" as a URI parameter as well.
+
+[float]
+==== SET
+
+The memcached `SET` command maps to a REST `POST`. The key used is the
+URI (with parameters), and the body maps to the REST body.
+
+[float]
+==== DELETE
+
+The memcached `DELETE` command maps to a REST `DELETE`. The key used is
+the URI (with parameters).
+
+[float]
+==== QUIT
+
+The memcached `QUIT` command is supported and disconnects the client.
+
+[float]
+=== Settings
+
+The following are the settings the can be configured for memcached:
+
+[cols="<,<",options="header",]
+|===============================================================
+|Setting |Description
+|`memcached.port` |A bind port range. Defaults to `11211-11311`.
+|===============================================================
+
+It also shares the uses the common
+<<modules-network,network settings>>.
+
+[float]
+=== Disable memcached
+
+The memcached module can be completely disabled and not started using by
+setting `memcached.enabled` to `false`. By default it is enabled once it
+is detected as a plugin.