| .. |
| .. Copyright 2015 Comcast Cable Communications Management, LLC |
| .. |
| .. 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. |
| .. |
| |
| Introduction |
| ============ |
| Traffic Control is a control plane for a CDN, which includes all of the components mentioned in the CDN Basics section, except for the Log File Analysis System. The caching software chosen for Traffic Control is `Apache Traffic Server <http://trafficserver.apache.org/>`_ (ATS). Although the current release only supports ATS as a cache, this may change with future releases. |
| |
| Traffic Control was first developed at Comcast for internal use and released to Open Source in April of 2015. |
| |
| Traffic Control implements the blue boxes in the architecture diagram below. |
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| |
| .. image:: traffic_control_overview_3.png |
| :align: center |
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| In the next sections each of these components will be explained further. |
