When I create a Roll-Up, will I see the reports for the past historical data as well?

Yes, we automatically set the creation date of a Roll-Up to the creation date of the oldest source website. This way you can view reports in the past for a Roll-Up.

If you are not seeing historical reports for your Roll-Up, please check the following:

1. Go to “Administration => General Settings” as a super user and check that the setting “RollUp Reporting => Synchronize creation date” is enabled.
2. Then check how your Matomo reports are processed. What we recommend is to setup the cron archiver core:archive. Once you create this crontab entry, it should also process all your historical reports for the Rollups after the crontab is executed the first time.
3. Then if you are still not seeing your historical data for your Roll-Up(s), try to force process all historical data, by first invalidating the data you want reprocessed and then running this command: ./console core:archive --force-all-websites --url=YOUR_MATOMO_URL_HERE
   (or if you are using Matomo 3.x, run the following command: ./console core:archive --force-all-websites --force-all-periods=315576000 --force-date-last-n=1000 --url=YOUR_MATOMO_URL_HERE)