..
      Copyright 2012 New Dream Network (DreamHost)

      Licensed under the Apache License, Version 2.0 (the "License"); you may
      not use this file except in compliance with the License. You may obtain
      a copy of the License at

          http://www.apache.org/licenses/LICENSE-2.0

      Unless required by applicable law or agreed to in writing, software
      distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
      WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
      License for the specific language governing permissions and limitations
      under the License.

==========
 Glossary
==========

.. glossary::

   agent
     Software service running on the OpenStack infrastructure
     measuring usage and sending the results to the :term:`collector`.

   API server
     HTTP REST API service for ceilometer.

   ceilometer
     From WikiPedia [#]_:

       A ceilometer is a device that uses a laser or other light
       source to determine the height of a cloud base.

   central agent
     Software service running on a central management node within the
     OpenStack infrastructure measuring usage and sending the results
     to the :term:`collector`.

   collector
     Software service running on the OpenStack infrastructure
     monitoring notifications from other OpenStack components and
     meter events from the ceilometer agent and recording the results
     in the database.

   compute agent
     Software service running on a compute node within the OpenStack
     infrastructure measuring usage and sending the results to the
     :term:`collector`.

   data store
     Storage system for recording data collected by ceilometer.

   non-repudiable
    From WikiPedia [#]_:

      Non-repudiation refers to a state of affairs where the purported
      maker of a statement will not be able to successfully challenge
      the validity of the statement or contract. The term is often
      seen in a legal setting wherein the authenticity of a signature
      is being challenged. In such an instance, the authenticity is
      being "repudiated".

.. [#] http://en.wikipedia.org/wiki/Ceilometer
.. [#] http://en.wikipedia.org/wiki/Non-repudiation
