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Graphite consists of two major components
1) the frontend Django webapp that runs under mod_python Apache
2) the backend daemon
Client applications connect to the running daemon on port 2003 and send it
lines of text of the following format:
" value unix_timestamp", for example:
"performance.servers.www01.cpuUsage 42.5 1208815315"
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 INSTALL file.
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/ 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 (