Merge pull request #1083 from obfuscurity/readme_rewrite

Simplify README and add diagram

README.md

@@ -4,48 +4,16 @@
 
 Graphite consists of two major components:
 
-1. the frontend Django webapp that runs under Apache/mod_wsgi
-2. the backend carbon-cache.py daemon
+1. The Django web application that runs under a wsgi-compatible webserver
+2. The [Carbon](https://github.com/graphite-project/carbon) metric processing daemons
+3. The [Whisper](https://github.com/graphite-project/whisper) time-series database library
 
-Client applications connect to the running carbon-cache.py daemon on port 2003 and send it
-lines of text of the following format:
+![Graphite Components](https://github.com/obfuscurity/graphite-web/raw/master/webapp/content/img/overview.png "Graphite Components")
 
-    my.metric.name value unix_timestamp
+## Installation, Configuration and Usage
 
-For example:
+Please refer to the instructions at [readthedocs](http://graphite.readthedocs.org/).
 
-    performance.servers.www01.cpuUsage 42.5 1208815315
+## License
 
-The metric name is like a filesystem path that uses `.` as a separator instead of `/`.
-The value is some scalar integer or floating point value.
-The unix_timestamp is unix epoch time, as an integer.
-
-Each line like this corresponds to one data point for one metric.
-
-Once you've got some clients sending data to carbon-cache, you can view
-graphs of that data in the frontend webapp.
-
-
-## Webapp Installation
-
-Use the instructions in the `docs/` folder or [on
-readthedocs](http://graphite.readthedocs.org/).
-
-## Running carbon-cache.py
-
-First you must tell carbon-cache what user it should run as.
-This must be a user with write privileges to `$GRAPHITE_ROOT/storage/whisper/`
-Specify the user account in `$GRAPHITE_ROOT/carbon/conf/carbon.conf`
-
-This user must also have write privileges to `$GRAPHITE_ROOT/storage/log/carbon-cache/`
-
-
-## Writing a client
-
-First you obviously need to decide what data it is you want to graph with
-graphite. The script `examples/example-client.py` demonstrates a simple client
-that sends loadavg data for your local machine to carbon on a minutely basis.
-
-The default storage schema stores data in one-minute intervals for 2 hours.
-This is probably not what you want so you should create a custom storage schema
-according to the docs on the graphite wiki (http://graphite.readthedocs.org/).
+Graphite-Web is licensed under version 2.0 of the Apache License. See the [LICENSE](https://github.com/graphite-project/graphite-web/blob/master/LICENSE) file for details.