> ## Documentation Index
> Fetch the complete documentation index at: https://docs.occtoo.com/llms.txt
> Use this file to discover all available pages before exploring further.

# CDN usage

> Daily hits and bandwidth across every destination, with a table view and a CSV export.

The **Content delivery network (CDN)** board plots what your destinations served, one point per day, across all destinations in the environment.

<img src="https://mintcdn.com/occtoo/2pv-aQldRCltpqYX/images/guides/studio/analytics/analytics-cdn-widget.png?fit=max&auto=format&n=2pv-aQldRCltpqYX&q=85&s=c0643e9451ed9c5aa40ace0b83aa0d3f" alt="The CDN board" width="1184" height="483" data-path="images/guides/studio/analytics/analytics-cdn-widget.png" />

## Choose what to plot

The first selector picks the measure:

| Option             | What it plots                                                      |
| ------------------ | ------------------------------------------------------------------ |
| **Total Hits**     | Number of requests served                                          |
| **Megabytes (MB)** | Volume served, converted from bytes and rounded to whole megabytes |
| **MB / hits**      | Average size of a response, to three decimals                      |

The second picks the period: **Last 7 days**, **Current month**, **Last month** or **Last 3 months**.

<Info>
  Days with no traffic are plotted as zero rather than skipped, so the horizontal axis always covers the whole period. On the **MB / hits** measure a day with no hits is also zero — it is not an average of nothing.
</Info>

## See the numbers behind the chart

The expand icon in the board header opens a full-screen view: the same chart, with a table of every day underneath.

<img src="https://mintcdn.com/occtoo/2pv-aQldRCltpqYX/images/guides/studio/analytics/analytics-cdn-expanded.png?fit=max&auto=format&n=2pv-aQldRCltpqYX&q=85&s=002e9f6f114a5c2a3ce7586bd1e5254a" alt="The expanded CDN board" width="1440" height="900" data-path="images/guides/studio/analytics/analytics-cdn-expanded.png" />

The table shows all three measures at once — **Date**, **Total Hits**, **Megabytes (MB)** and **MB / hits** — regardless of which one the chart is plotting. Every column header sorts. The selectors and **Export CSV** stay available at the top of the full-screen view.

Close it with the **X** or the Escape key.

## Export to CSV

**Export CSV** downloads the currently selected period as `CDN-Stats-<YYYY-MM-DD>.csv`, stamped with today's date.

The file is **semicolon-delimited** and splits the date into two numeric columns:

```
Month;Day;Total Hits;Megabytes (MB);MB / hits
8;27;200;29;0.144
```

<Warning>
  The export follows the period selector but ignores the measure selector — every export contains all three measures. It carries no year column, so exports spanning a year boundary need the file name to tell them apart.
</Warning>