How does OpenX collect event data?

The Ad ServerA complete digital advertising platform where publishers sell, manage, and deliver their advertising inventory across all digital formats. collects event-level data, processes the events based on IAB-certified rules and procedures, and then the Feed Server stores them as GZIP compressed files. Depending on your configuration, the Feed Server generates files per minute (the default) or per hour, and stores them per event. That is, each minute or hour, the Feed Server generates and stores up to four files (one for each event type). Each tab-delimited file contains a header row and is UTF-8-encoded. Each row in the file contains a record for a single event, where each column contains a piece of collected data. For example, each row of an impressionA single display of an ad on a web page, mobile app, or other delivery medium. For deals, impression is a metric to relay the total number of ads that have served. See also billable impression, forecasted impressions. event file contains details about a single impression within the hour or minute for which data was collected.

This topic applies to Ad Server. This topic applies to Ad Exchange. This topic applies to Programmatic Direct.