Carousel Bulletin Impression Reports
Impressions are tracked continuously for bulletins that are set to track. The data is staged in the database for each day and then written to an impression report on disk each night. Only the reports on disk can be downloaded through the Carousel UI, the current day will not be available in the report.
The fields that are written to the impression report are described below. Each day, each tracked bulletin will generate a line in the downloaded report, this consolidates the impressions so they are more manageable. The time of impression is conveyed by a count in a time period for every 15 minutes throughout the day.
Impression reports are removed after a certain number of days automatically so they don't ultimately consume the entire disk in a server. The time at which the reports will be removed can be changed to match the user's preference but it is not available in the Carousel UI, it must be changed in the database Options table: ImpressionDays which is set to 365 by default. The reports are saved in Media\BulletinReports\<year>\<month>\<day>.zip and can be deleted from the Windows Explorer with no disastrous effects if they are no longer needed.
The reports are compressed into .zip files when written to disk.
There is a new health check that will show you how many bulletins are tracked, which zones those bulletins are on and how big the reports are. This can be used by us to determine if the reports are getting out of control or to confirm bulletins are set to be tracked.