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| <span class="target" id="reference-label-tc-ts"></span><div class="section" id="traffic-stats"> |
| <h1>Traffic Stats<a class="headerlink" href="#traffic-stats" title="Permalink to this headline">ΒΆ</a></h1> |
| <p>Traffic Stats is a program written in <a class="reference external" href="http://golang.org">Golang</a> that is used to acquire and store statistics about CDNs controlled by Traffic Control. Traffic Stats mines metrics from Traffic Monitor’s JSON APIs and stores the data in <a class="reference external" href="http://influxdb.com">InfluxDb</a>. Data is typically stored in InfluxDb on a short-term basis (30 days or less). The data from InfluxDb is then used to drive graphs created by <a class="reference external" href="http://grafana.org">Grafana</a> - which are linked to from Traffic Ops - as well as provide data exposed through the Traffic Ops API. Traffic Stats performs two functions: first it gathers stat data for Edge Caches and Delivery Services at a configurable interval (10 second default) from the Traffic Monitor API’s and stores the data in InfluxDb; second it summarizes all of the stats once a day (around midnight UTC) and creates a daily rollup containing the Max Gbps served and the Total Bytes served.</p> |
| <p>Stat data is stored in three different databases:</p> |
| <blockquote> |
| <div><ul class="simple"> |
| <li>cache_stats: The cache_stats database is used to store data gathered from edge caches. The <a class="reference external" href="https://influxdb.com/docs/v0.9/concepts/glossary.html#measurement">measurements</a> stored by cache are: bandwidth, maxKbps, and client_connections (ats.proxy.process.http.current_client_connections). Cache Data is stored with <a class="reference external" href="https://influxdb.com/docs/v0.9/concepts/glossary.html#tag">tags</a> for hostname, cachegroup, and CDN. Data can be queried using tags.</li> |
| <li>deliveryservice_stats: The deliveryservice_stats database is used to store data for delivery services. The measurements stored by delivery service are: kbps, status_4xx, status_5xx, tps_2xx, tps_3xx, tps_4xx, tps_5xx, and tps_total. Delivery Service stats are stored with tags for cachegroup, CDN, and Deliveryservice xml_id.</li> |
| <li>daily_stats: The daily_stats database is used to store summary data for daily activities. The stats that are currently summarized are Max Bandwidth and Bytes Served and they are stored by CDN.</li> |
| </ul> |
| </div></blockquote> |
| <hr class="docutils" /> |
| <p>Traffic Stats does not influence overall CDN operation, but is required in order to display charts in Traffic Ops and Traffic Portal.</p> |
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