To manage the accumulation of production data, InterSystems IRIS enables users to manage the database size by periodically purging the data. This purge can apply to messages, logs, business processes, and managed alerts.

Please check the documentation for more details on the settings of the purge task:
https://docs.intersystems.com/irislatest/csp/docbook/DocBook.UI.Page.cls?KEY=EGMG_purge#EGMG_purge_settings

The complex record mapper can help you process text file data consisting of various types of records to persistent messages in IRIS. To gain a basic understanding of the complex record mapper and see an example implemented in the production, check out the learning services video below:

https://community.intersystems.com/post/video-using-complex-record-mapper