Transfer of log files

DataSync is configured to periodically (every hour on the half hour mark) to move the rotated and archived metric log files from EFS to an equivalent location in S3. For details, see the Logging section. This period is set through Cron schedule by DATASYNC_METRICS_SCHEDULE = "cron(30 * * * ? *)" and DATASYNC_LOGS_SCHEDULE = "cron(30 * * * ? *)". These parameters are available through the source/infrastructure/prebid_server/stack_constants.py file in the solution source code.

After each file is copied to S3 and verified, it is removed from the EFS file system through a Lambda function. Only actively written log files are retained on the EFS.