Glossary A–ZLetter L
Log
A log is a continuous record of events that a device or software keeps with timestamps, such as start-ups, errors, logins or content played.
It serves troubleshooting, evidence and traceability.
There are several kinds in screen networks. The player’s device log helps with troubleshooting, for example when a video does not start. The playback log shows what ran and when, and is the basis for proof of play. The change and login log in the management software shows who changed what and when. Many players send their logs to the management software, where they can be viewed centrally.
Logs need a retention period: if it is too short, the data is missing when a fault occurs; if it is too long, logs fill up storage and contain unnecessary personal data such as user names and IP addresses. Timestamps are only as good as the device’s clock. Proof of play for advertising may be subject to different retention rules than an error log. Where logs are used to evaluate employees’ behaviour, the works council may have a right of co-determination.