| .. _glossary: |
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| Glossary |
| ======== |
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| .. glossary:: |
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| 302 content routing |
| :ref:`rl-http-cr`. |
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| astats (stats_over_http) |
| An ATS plugin that allows you to monitor vitals of the ATS server. See :ref:`rl-astats`. |
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| cache |
| A caching proxy server. See :ref:`rl-caching_proxy`. |
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| cachegroup |
| A group of caches that together create a combined larger cache using consistent hashing. See :ref:`rl-cachegroup`. |
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| consistent hashing |
| See `the Wikipedia article <http://en.wikipedia.org/wiki/Consistent_hashing>`_; Traffic Control uses consistent hashing when using :ref:`rl-http-cr` for the edge tier and when selecting parents in the mid tier. |
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| content routing |
| Directing clients (or client systems) to a particular location or device in a location for optimal delivery of content See also :ref:`rl-http-cr` and :ref:`rl-dns-cr`. |
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| coverage zone map |
| The coverage zone map (czm) or coverage zone file (zcf) is a file that maps network prefixes to cachegroups. See :ref:`rl-localization`. |
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| delivery service |
| A grouping of content in the CDN, usually a determined by the URL hostname. See :ref:`rl-ds`. |
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| edge (tier or cache) |
| Closest to the client or end-user. The edge tier is the tier that serves the client, edge caches are caches in the edge tier. In a Traffic Control CDN the basic function of the edge cache is that of a :ref:`rl-rev-proxy`. See also :ref:`rl-cachegroup`. |
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| (traffic ops) extension |
| Using *extensions*, Traffic Ops be extended to use proprietary checks or monitoring sources. See :ref:`rl-trops-ext`. |
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| forward proxy |
| A proxy that works that acts like it is the client to the origin. See :ref:`rl-fwd-proxy`. |
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| geo localization or geo routing |
| Localizing clients to the nearest caches using a geo database like the one from Maxmind. |
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| health protocol |
| The protocol to monitor the health of all the caches. See :ref:`rl-health-proto`. |
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| localization |
| Finding location on the network, or on planet earth. See :ref:`rl-localization`. |
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| mid (tier or cache) |
| The tier above the edge tier. The mid tier does not directly serves the end-user and is used as an additional layer between the edge and the origin. In a Traffic Control CDN the basic function of the mid cache is that of a :ref:`rl-fwd-proxy`. See also :ref:`rl-cachegroup`. |
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| origin |
| The source of content for the CDN. Usually a redundant HTTP/1.1 webserver. |
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| parent (cache or cachegroup) |
| The (group of) cache(s) in the higher tier. See :ref:`rl-cachegroup`. |
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| profile |
| A group of settings (parameters) that will be applied to a server. See :ref:`rl-profile`. |
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| reverse proxy |
| A proxy that acts like it is the origin to the client. See :ref:`rl-rev-proxy`. |
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